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3625 lines
103 KiB
D
3625 lines
103 KiB
D
// Written in the D programming language.
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/**
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* Templates with which to extract information about types and symbols at
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* compile time.
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*
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* Macros:
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* WIKI = Phobos/StdTraits
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*
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* Copyright: Copyright Digital Mars 2005 - 2009.
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* License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
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* Authors: $(WEB digitalmars.com, Walter Bright),
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* Tomasz Stachowiak ($(D isExpressionTuple)),
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* $(WEB erdani.org, Andrei Alexandrescu),
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* Shin Fujishiro
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* Source: $(PHOBOSSRC std/_traits.d)
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*/
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/* Copyright Digital Mars 2005 - 2009.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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module std.traits;
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import std.typetuple;
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import std.typecons : Rebindable;
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import core.vararg;
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//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
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// Functions
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//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
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// Petit demangler
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// (this or similar thing will eventually go to std.demangle if necessary
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// ctfe stuffs are available)
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private
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{
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struct Demangle(T)
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{
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T value; // extracted information
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string rest;
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}
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/* Demangles mstr as the storage class part of Argument. */
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Demangle!uint demangleParameterStorageClass(string mstr)
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{
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uint pstc = 0; // parameter storage class
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// Argument --> Argument2 | M Argument2
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if (mstr.length > 0 && mstr[0] == 'M')
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{
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pstc |= ParameterStorageClass.SCOPE;
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mstr = mstr[1 .. $];
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}
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// Argument2 --> Type | J Type | K Type | L Type
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ParameterStorageClass stc2;
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switch (mstr.length ? mstr[0] : char.init)
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{
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case 'J': stc2 = ParameterStorageClass.OUT; break;
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case 'K': stc2 = ParameterStorageClass.REF; break;
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case 'L': stc2 = ParameterStorageClass.LAZY; break;
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default : break;
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}
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if (stc2 != ParameterStorageClass.init)
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{
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pstc |= stc2;
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mstr = mstr[1 .. $];
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}
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return Demangle!uint(pstc, mstr);
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}
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/* Demangles mstr as FuncAttrs. */
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Demangle!uint demangleFunctionAttributes(string mstr)
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{
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enum LOOKUP_ATTRIBUTE =
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[
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'a': FunctionAttribute.PURE,
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'b': FunctionAttribute.NOTHROW,
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'c': FunctionAttribute.REF,
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'd': FunctionAttribute.PROPERTY,
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'e': FunctionAttribute.TRUSTED,
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'f': FunctionAttribute.SAFE
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];
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uint atts = 0;
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// FuncAttrs --> FuncAttr | FuncAttr FuncAttrs
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// FuncAttr --> empty | Na | Nb | Nc | Nd | Ne | Nf
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while (mstr.length >= 2 && mstr[0] == 'N')
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{
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if (FunctionAttribute att = LOOKUP_ATTRIBUTE[ mstr[1] ])
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{
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atts |= att;
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mstr = mstr[2 .. $];
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}
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else assert(0);
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}
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return Demangle!uint(atts, mstr);
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}
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}
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// workaround @@@BUG4333@@@
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private template staticLength(tuple...)
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{
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enum size_t staticLength = tuple.length;
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}
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/***
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* Get the type of the return value from a function,
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* a pointer to function, a delegate, a struct
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* with an opCall, a pointer to a struct with an opCall,
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* or a class with an opCall.
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* Example:
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* ---
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* import std.traits;
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* int foo();
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* ReturnType!(foo) x; // x is declared as int
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* ---
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*/
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template ReturnType(/+@@@BUG4217@@@+/func...)
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if (/+@@@BUG4333@@@+/staticLength!(func) == 1)
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{
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static if (is(FunctionTypeOf!(func) R == return))
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alias R ReturnType;
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else
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static assert(0, "argument has no return type");
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}
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unittest
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{
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struct G
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{
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int opCall (int i) { return 1;}
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}
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alias ReturnType!(G) ShouldBeInt;
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static assert(is(ShouldBeInt == int));
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G g;
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static assert(is(ReturnType!(g) == int));
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G* p;
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alias ReturnType!(p) pg;
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static assert(is(pg == int));
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class C
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{
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int opCall (int i) { return 1;}
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}
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static assert(is(ReturnType!(C) == int));
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C c;
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static assert(is(ReturnType!(c) == int));
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class Test
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{
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int prop() @property { return 0; }
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}
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alias ReturnType!(Test.prop) R_Test_prop;
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static assert(is(R_Test_prop == int));
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alias ReturnType!((int a) { return a; }) R_dglit;
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static assert(is(R_dglit == int));
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}
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/***
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Get, as a tuple, the types of the parameters to a function, a pointer
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to function, a delegate, a struct with an $(D opCall), a pointer to a
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struct with an $(D opCall), or a class with an $(D opCall).
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Example:
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---
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import std.traits;
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int foo(int, long);
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void bar(ParameterTypeTuple!(foo)); // declares void bar(int, long);
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void abc(ParameterTypeTuple!(foo)[1]); // declares void abc(long);
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---
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*/
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template ParameterTypeTuple(/+@@@BUG4217@@@+/dg...)
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if (/+@@@BUG4333@@@+/staticLength!(dg) == 1)
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{
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static if (is(FunctionTypeOf!(dg) P == function))
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alias P ParameterTypeTuple;
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else
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static assert(0, "argument has no parameters");
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}
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unittest
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{
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int foo(int i, bool b) { return 0; }
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static assert (is(ParameterTypeTuple!(foo) == TypeTuple!(int, bool)));
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static assert (is(ParameterTypeTuple!(typeof(&foo))
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== TypeTuple!(int, bool)));
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struct S { real opCall(real r, int i) { return 0.0; } }
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S s;
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static assert (is(ParameterTypeTuple!(S) == TypeTuple!(real, int)));
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static assert (is(ParameterTypeTuple!(S*) == TypeTuple!(real, int)));
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static assert (is(ParameterTypeTuple!(s) == TypeTuple!(real, int)));
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class Test
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{
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int prop() @property { return 0; }
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}
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alias ParameterTypeTuple!(Test.prop) P_Test_prop;
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static assert(P_Test_prop.length == 0);
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alias ParameterTypeTuple!((int a){}) P_dglit;
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static assert(P_dglit.length == 1);
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static assert(is(P_dglit[0] == int));
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}
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/**
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Returns a tuple consisting of the storage classes of the parameters of a
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function $(D func).
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Example:
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--------------------
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alias ParameterStorageClass STC; // shorten the enum name
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void func(ref int ctx, out real result, real param)
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{
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}
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alias ParameterStorageClassTuple!(func) pstc;
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static assert(pstc.length == 3); // three parameters
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static assert(pstc[0] == STC.REF);
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static assert(pstc[1] == STC.OUT);
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static assert(pstc[2] == STC.NONE);
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--------------------
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*/
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enum ParameterStorageClass : uint
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{
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/**
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* These flags can be bitwise OR-ed together to represent complex storage
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* class.
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*/
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NONE = 0,
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SCOPE = 0b000_1, /// ditto
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OUT = 0b001_0, /// ditto
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REF = 0b010_0, /// ditto
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LAZY = 0b100_0, /// ditto
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}
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/// ditto
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template ParameterStorageClassTuple(/+@@@BUG4217@@@+/func...)
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if (/+@@@BUG4333@@@+/staticLength!(func) == 1)
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{
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static if (is(FunctionTypeOf!(func) F))
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alias ParameterStorageClassTupleImpl!(Unqual!(F)).Result
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ParameterStorageClassTuple;
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else
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static assert(0, "argument has no parameters");
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}
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private template ParameterStorageClassTupleImpl(Func)
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{
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/*
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* TypeFuncion:
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* CallConvention FuncAttrs Arguments ArgClose Type
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*/
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alias ParameterTypeTuple!(Func) Params;
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// chop off CallConvention and FuncAttrs
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enum margs = demangleFunctionAttributes(mangledName!(Func)[1 .. $]).rest;
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// demangle Arguments and store parameter storage classes in a tuple
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template demangleNextParameter(string margs, size_t i = 0)
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{
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static if (i < Params.length)
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{
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enum demang = demangleParameterStorageClass(margs);
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enum skip = mangledName!(Params[i]).length; // for bypassing Type
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enum rest = demang.rest;
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alias TypeTuple!(
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demang.value + 0, // workaround: "not evaluatable at ..."
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demangleNextParameter!(rest[skip .. $], i + 1).Result
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) Result;
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}
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else // went thru all the parameters
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{
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alias TypeTuple!() Result;
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}
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}
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alias demangleNextParameter!(margs).Result Result;
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}
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unittest
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{
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alias ParameterStorageClass STC;
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void noparam() {}
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static assert(ParameterStorageClassTuple!(noparam).length == 0);
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void test(scope int, ref int, out int, lazy int, int) { }
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alias ParameterStorageClassTuple!(test) test_pstc;
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static assert(test_pstc.length == 5);
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static assert(test_pstc[0] == STC.SCOPE);
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static assert(test_pstc[1] == STC.REF);
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static assert(test_pstc[2] == STC.OUT);
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static assert(test_pstc[3] == STC.LAZY);
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static assert(test_pstc[4] == STC.NONE);
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interface Test
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{
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void test_const(int) const;
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void test_sharedconst(int) shared const;
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}
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Test testi;
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alias ParameterStorageClassTuple!(Test.test_const) test_const_pstc;
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static assert(test_const_pstc.length == 1);
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static assert(test_const_pstc[0] == STC.NONE);
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alias ParameterStorageClassTuple!(testi.test_sharedconst) test_sharedconst_pstc;
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static assert(test_sharedconst_pstc.length == 1);
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static assert(test_sharedconst_pstc[0] == STC.NONE);
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alias ParameterStorageClassTuple!((ref int a) {}) dglit_pstc;
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static assert(dglit_pstc.length == 1);
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static assert(dglit_pstc[0] == STC.REF);
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}
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/**
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Returns the attributes attached to a function $(D func).
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Example:
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--------------------
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alias FunctionAttribute FA; // shorten the enum name
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real func(real x) pure nothrow @safe
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{
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return x;
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}
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static assert(functionAttributes!(func) & FA.PURE);
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static assert(functionAttributes!(func) & FA.SAFE);
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static assert(!(functionAttributes!(func) & FA.TRUSTED)); // not @trusted
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--------------------
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*/
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enum FunctionAttribute : uint
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{
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/**
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* These flags can be bitwise OR-ed together to represent complex attribute.
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*/
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NONE = 0,
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PURE = 0b00000001, /// ditto
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NOTHROW = 0b00000010, /// ditto
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REF = 0b00000100, /// ditto
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PROPERTY = 0b00001000, /// ditto
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TRUSTED = 0b00010000, /// ditto
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SAFE = 0b00100000, /// ditto
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}
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/// ditto
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template functionAttributes(/+@@@BUG4217@@@+/func...)
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if (/+@@@BUG4333@@@+/staticLength!(func) == 1)
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{
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static if (is(FunctionTypeOf!(func) F))
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enum uint functionAttributes = demangleFunctionAttributes(
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mangledName!(Unqual!(F))[1 .. $] ).value;
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else
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static assert(0, "argument is not a function");
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}
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unittest
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{
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alias FunctionAttribute FA;
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interface Set
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{
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int pureF() pure;
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int nothrowF() nothrow;
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ref int refF();
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int propertyF() @property;
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int trustedF() @trusted;
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int safeF() @safe;
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}
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static assert(functionAttributes!(Set.pureF) == FA.PURE);
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static assert(functionAttributes!(Set.nothrowF) == FA.NOTHROW);
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static assert(functionAttributes!(Set.refF) == FA.REF);
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static assert(functionAttributes!(Set.propertyF) == FA.PROPERTY);
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static assert(functionAttributes!(Set.trustedF) == FA.TRUSTED);
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static assert(functionAttributes!(Set.safeF) == FA.SAFE);
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static assert(!(functionAttributes!(Set.safeF) & FA.TRUSTED));
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int pure_nothrow() pure nothrow { return 0; }
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static assert(functionAttributes!(pure_nothrow) == (FA.PURE | FA.NOTHROW));
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//ref int ref_property() @property { return *(new int); } // @@@BUG2509@@@
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//static assert(functionAttributes!(ref_property) == (FA.REF | FA.PROPERTY));
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void safe_nothrow() @safe nothrow { }
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static assert(functionAttributes!(safe_nothrow) == (FA.SAFE | FA.NOTHROW));
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interface Test2
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{
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int pure_const() pure const;
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int pure_sharedconst() pure shared const;
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}
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static assert(functionAttributes!(Test2.pure_const) == FA.PURE);
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static assert(functionAttributes!(Test2.pure_sharedconst) == FA.PURE);
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static assert(functionAttributes!((int a) {}) == FA.NONE);
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}
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private @safe void dummySafeFunc(alias func)()
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{
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alias ParameterTypeTuple!func Params;
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static if (Params.length)
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{
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Params args;
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func(args);
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}
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else
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{
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func();
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}
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}
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/**
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Checks the func that is @safe or @trusted
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Example:
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--------------------
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@system int add(int a, int b) {return a+b;}
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@safe int sub(int a, int b) {return a-b;}
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@trusted int mul(int a, int b) {return a*b;}
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bool a = isSafe!(add);
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assert(a == false);
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bool b = isSafe!(sub);
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assert(b == true);
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bool c = isSafe!(mul);
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assert(c == true);
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--------------------
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*/
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template isSafe(alias func)
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{
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static if (is(typeof(func) == function))
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{
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enum isSafe = (functionAttributes!(func) == FunctionAttribute.SAFE
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|| functionAttributes!(func) == FunctionAttribute.TRUSTED);
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}
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else
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{
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enum isSafe = is(typeof({dummySafeFunc!func();}()));
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}
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}
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@safe
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unittest
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{
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interface Set
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{
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int systemF() @system;
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int trustedF() @trusted;
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int safeF() @safe;
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}
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static assert(isSafe!((int a){}));
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static assert(isSafe!(Set.safeF));
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static assert(isSafe!(Set.trustedF));
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static assert(!isSafe!(Set.systemF));
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}
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/**
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Checks the all functions are @safe or @trusted
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Example:
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--------------------
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@system int add(int a, int b) {return a+b;}
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@safe int sub(int a, int b) {return a-b;}
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@trusted int mul(int a, int b) {return a*b;}
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bool a = areAllSafe!(add, sub);
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assert(a == false);
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bool b = areAllSafe!(sub, mul);
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assert(b == true);
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--------------------
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*/
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template areAllSafe(funcs...)
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if (funcs.length > 0)
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{
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static if (funcs.length == 1)
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{
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enum areAllSafe = isSafe!(funcs[0]);
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}
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else static if (isSafe!(funcs[0]))
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{
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enum areAllSafe = areAllSafe!(funcs[1..$]);
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}
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else
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{
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enum areAllSafe = false;
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}
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}
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|
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@safe
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unittest
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|
{
|
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interface Set
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{
|
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int systemF() @system;
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int trustedF() @trusted;
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int safeF() @safe;
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}
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static assert(areAllSafe!((int a){}, Set.safeF));
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static assert(!areAllSafe!(Set.trustedF, Set.systemF));
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}
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/**
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Checks the func that is @system
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Example:
|
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--------------------
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@system int add(int a, int b) {return a+b;}
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@safe int sub(int a, int b) {return a-b;}
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@trusted int mul(int a, int b) {return a*b;}
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bool a = isUnsafe!(add);
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assert(a == true);
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bool b = isUnsafe!(sub);
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assert(b == false);
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bool c = isUnsafe!(mul);
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assert(c == false);
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|
--------------------
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*/
|
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template isUnsafe(alias func)
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|
{
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enum isUnsafe = !isSafe!func;
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}
|
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|
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@safe
|
|
unittest
|
|
{
|
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interface Set
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|
{
|
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int systemF() @system;
|
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int trustedF() @trusted;
|
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int safeF() @safe;
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|
}
|
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static assert(!isUnsafe!((int a){}));
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static assert(!isUnsafe!(Set.safeF));
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static assert(!isUnsafe!(Set.trustedF));
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|
static assert(isUnsafe!(Set.systemF));
|
|
}
|
|
|
|
/**
|
|
Returns the calling convention of function as a string.
|
|
|
|
Example:
|
|
--------------------
|
|
string a = functionLinkage!(writeln!(string, int));
|
|
assert(a == "D"); // extern(D)
|
|
|
|
auto fp = &printf;
|
|
string b = functionLinkage!(fp);
|
|
assert(b == "C"); // extern(C)
|
|
--------------------
|
|
*/
|
|
template functionLinkage(/+@@@BUG4217@@@+/func...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(func) == 1)
|
|
{
|
|
static if (is(FunctionTypeOf!(func) F))
|
|
enum string functionLinkage =
|
|
LOOKUP_LINKAGE[ mangledName!(Unqual!(F))[0] ];
|
|
else
|
|
static assert(0, "argument is not a function");
|
|
}
|
|
|
|
private enum LOOKUP_LINKAGE =
|
|
[
|
|
'F': "D",
|
|
'U': "C",
|
|
'W': "Windows",
|
|
'V': "Pascal",
|
|
'R': "C++"
|
|
];
|
|
|
|
unittest
|
|
{
|
|
extern(D) void Dfunc() {}
|
|
extern(C) void Cfunc() {}
|
|
static assert(functionLinkage!(Dfunc) == "D");
|
|
static assert(functionLinkage!(Cfunc) == "C");
|
|
|
|
interface Test
|
|
{
|
|
void const_func() const;
|
|
void sharedconst_func() shared const;
|
|
}
|
|
static assert(functionLinkage!(Test.const_func) == "D");
|
|
static assert(functionLinkage!(Test.sharedconst_func) == "D");
|
|
|
|
static assert(functionLinkage!((int a){}) == "D");
|
|
}
|
|
|
|
|
|
/**
|
|
Determines what kind of variadic parameters function has.
|
|
|
|
Example:
|
|
--------------------
|
|
void func() {}
|
|
static assert(variadicFunctionStyle!(func) == Variadic.NO);
|
|
|
|
extern(C) int printf(in char*, ...);
|
|
static assert(variadicFunctionStyle!(printf) == Variadic.C);
|
|
--------------------
|
|
*/
|
|
enum Variadic
|
|
{
|
|
NO, /// Function is not variadic.
|
|
C, /// Function is a _C-style variadic function.
|
|
/// Function is a _D-style variadic function, which uses
|
|
D, /// __argptr and __arguments.
|
|
TYPESAFE, /// Function is a typesafe variadic function.
|
|
}
|
|
|
|
/// ditto
|
|
template variadicFunctionStyle(/+@@@BUG4217@@@+/func...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(func) == 1)
|
|
{
|
|
static if (is(FunctionTypeOf!(func) F))
|
|
enum Variadic variadicFunctionStyle =
|
|
determineVariadicity!(Unqual!(F))();
|
|
else
|
|
static assert(0, "argument is not a function");
|
|
}
|
|
|
|
private Variadic determineVariadicity(Func)()
|
|
{
|
|
// TypeFuncion --> CallConvention FuncAttrs Arguments ArgClose Type
|
|
immutable callconv = functionLinkage!(Func);
|
|
immutable mfunc = mangledName!(Func);
|
|
immutable mtype = mangledName!(ReturnType!(Func));
|
|
debug assert(mfunc[$ - mtype.length .. $] == mtype, mfunc ~ "|" ~ mtype);
|
|
|
|
immutable argclose = mfunc[$ - mtype.length - 1];
|
|
final switch (argclose)
|
|
{
|
|
case 'X': return Variadic.TYPESAFE;
|
|
case 'Y': return (callconv == "C") ? Variadic.C : Variadic.D;
|
|
case 'Z': return Variadic.NO;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
extern(D) void novar() {};
|
|
extern(C) void cstyle(int, ...) {};
|
|
extern(D) void dstyle(...) {};
|
|
extern(D) void typesafe(int[]...) {};
|
|
|
|
static assert(variadicFunctionStyle!(novar) == Variadic.NO);
|
|
static assert(variadicFunctionStyle!(cstyle) == Variadic.C);
|
|
static assert(variadicFunctionStyle!(dstyle) == Variadic.D);
|
|
static assert(variadicFunctionStyle!(typesafe) == Variadic.TYPESAFE);
|
|
|
|
static assert(variadicFunctionStyle!((int[] a...) {}) == Variadic.TYPESAFE);
|
|
}
|
|
|
|
|
|
/**
|
|
Get the function type from a callable object $(D func).
|
|
|
|
Using builtin $(D typeof) on a property function yields the types of the
|
|
property value, not of the property function itself. Still,
|
|
$(D FunctionTypeOf) is able to obtain function types of properties.
|
|
--------------------
|
|
class C {
|
|
int value() @property;
|
|
}
|
|
static assert(is( typeof(C.value) == int ));
|
|
static assert(is( FunctionTypeOf!(C.value) == function ));
|
|
--------------------
|
|
|
|
Note:
|
|
Do not confuse function types with function pointer types; function types are
|
|
usually used for compile-time reflection purposes.
|
|
*/
|
|
template FunctionTypeOf(/+@@@BUG4217@@@+/func...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(func) == 1)
|
|
{
|
|
alias FunctionTypeOf_bug4333!(func).FunctionTypeOf FunctionTypeOf;
|
|
}
|
|
private template FunctionTypeOf_bug4333(func...)
|
|
{
|
|
/+@@@BUG4333@@@+/enum dummy__ = func.length;
|
|
|
|
static if (is(typeof(& func[0]) Fsym : Fsym*) && is(Fsym == function))
|
|
{
|
|
alias Fsym FunctionTypeOf; // HIT: function symbol
|
|
}
|
|
else static if (is(typeof(& func[0].opCall) Fobj == delegate))
|
|
{
|
|
alias Fobj FunctionTypeOf; // HIT: callable object
|
|
}
|
|
else static if (is(typeof(& func[0].opCall) Ftyp : Ftyp*) && is(Ftyp == function))
|
|
{
|
|
alias Ftyp FunctionTypeOf; // HIT: callable type
|
|
}
|
|
else static if (is(func[0] T) || is(typeof(func[0]) T))
|
|
{
|
|
static if (is(T == function))
|
|
alias T FunctionTypeOf; // HIT: function
|
|
else static if (is(T Fptr : Fptr*) && is(Fptr == function))
|
|
alias Fptr FunctionTypeOf; // HIT: function pointer
|
|
else static if (is(T Fdlg == delegate))
|
|
alias Fdlg FunctionTypeOf; // HIT: delegate
|
|
}
|
|
else static assert(0, "argument is not a callable object");
|
|
}
|
|
|
|
unittest
|
|
{
|
|
int test(int a) { return 0; }
|
|
int function(int) test_fp;
|
|
int delegate(int) test_dg;
|
|
static assert(is( typeof(test) == FunctionTypeOf!(typeof(test)) ));
|
|
static assert(is( typeof(test) == FunctionTypeOf!(test) ));
|
|
static assert(is( typeof(test) == FunctionTypeOf!(test_fp) ));
|
|
static assert(is( typeof(test) == FunctionTypeOf!(test_dg) ));
|
|
|
|
interface Prop { int prop() @property; }
|
|
Prop prop;
|
|
static assert(is( FunctionTypeOf!(Prop.prop) == function ));
|
|
static assert(is( FunctionTypeOf!(prop.prop) == function ));
|
|
|
|
class Callable { int opCall(int) { return 0; } }
|
|
auto call = new Callable;
|
|
static assert(is( FunctionTypeOf!(call) == typeof(test) ));
|
|
|
|
struct StaticCallable { static int opCall(int) { return 0; } }
|
|
StaticCallable stcall_val;
|
|
StaticCallable* stcall_ptr;
|
|
static assert(is( FunctionTypeOf!(stcall_val) == typeof(test) ));
|
|
static assert(is( FunctionTypeOf!(stcall_ptr) == typeof(test) ));
|
|
|
|
interface Overloads {
|
|
void test(string);
|
|
real test(real);
|
|
int test();
|
|
int test() @property;
|
|
}
|
|
alias TypeTuple!(__traits(getVirtualFunctions, Overloads, "test")) ov;
|
|
alias FunctionTypeOf!(ov[0]) F_ov0;
|
|
alias FunctionTypeOf!(ov[1]) F_ov1;
|
|
alias FunctionTypeOf!(ov[2]) F_ov2;
|
|
alias FunctionTypeOf!(ov[3]) F_ov3;
|
|
static assert(is(F_ov0* == void function(string)));
|
|
static assert(is(F_ov1* == real function(real)));
|
|
static assert(is(F_ov2* == int function()));
|
|
static assert(is(F_ov3* == int function() @property));
|
|
|
|
alias FunctionTypeOf!((int a){ return a; }) F_dglit;
|
|
static assert(is(F_dglit* == int function(int)));
|
|
}
|
|
|
|
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
// Aggregate Types
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
|
|
/***
|
|
* Get the types of the fields of a struct or class.
|
|
* This consists of the fields that take up memory space,
|
|
* excluding the hidden fields like the virtual function
|
|
* table pointer.
|
|
*/
|
|
|
|
template FieldTypeTuple(S)
|
|
{
|
|
static if (is(S == struct) || is(S == class) || is(S == union))
|
|
alias typeof(S.tupleof) FieldTypeTuple;
|
|
else
|
|
alias TypeTuple!(S) FieldTypeTuple;
|
|
//static assert(0, "argument is not struct or class");
|
|
}
|
|
|
|
// // FieldOffsetsTuple
|
|
// private template FieldOffsetsTupleImpl(size_t n, T...)
|
|
// {
|
|
// static if (T.length == 0)
|
|
// {
|
|
// alias TypeTuple!() Result;
|
|
// }
|
|
// else
|
|
// {
|
|
// //private alias FieldTypeTuple!(T[0]) Types;
|
|
// private enum size_t myOffset =
|
|
// ((n + T[0].alignof - 1) / T[0].alignof) * T[0].alignof;
|
|
// static if (is(T[0] == struct))
|
|
// {
|
|
// alias FieldTypeTuple!(T[0]) MyRep;
|
|
// alias FieldOffsetsTupleImpl!(myOffset, MyRep, T[1 .. $]).Result
|
|
// Result;
|
|
// }
|
|
// else
|
|
// {
|
|
// private enum size_t mySize = T[0].sizeof;
|
|
// alias TypeTuple!(myOffset) Head;
|
|
// static if (is(T == union))
|
|
// {
|
|
// alias FieldOffsetsTupleImpl!(myOffset, T[1 .. $]).Result
|
|
// Tail;
|
|
// }
|
|
// else
|
|
// {
|
|
// alias FieldOffsetsTupleImpl!(myOffset + mySize,
|
|
// T[1 .. $]).Result
|
|
// Tail;
|
|
// }
|
|
// alias TypeTuple!(Head, Tail) Result;
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
// template FieldOffsetsTuple(T...)
|
|
// {
|
|
// alias FieldOffsetsTupleImpl!(0, T).Result FieldOffsetsTuple;
|
|
// }
|
|
|
|
// unittest
|
|
// {
|
|
// alias FieldOffsetsTuple!(int) T1;
|
|
// assert(T1.length == 1 && T1[0] == 0);
|
|
// //
|
|
// struct S2 { char a; int b; char c; double d; char e, f; }
|
|
// alias FieldOffsetsTuple!(S2) T2;
|
|
// //pragma(msg, T2);
|
|
// static assert(T2.length == 6
|
|
// && T2[0] == 0 && T2[1] == 4 && T2[2] == 8 && T2[3] == 16
|
|
// && T2[4] == 24&& T2[5] == 25);
|
|
// //
|
|
// class C { int a, b, c, d; }
|
|
// struct S3 { char a; C b; char c; }
|
|
// alias FieldOffsetsTuple!(S3) T3;
|
|
// //pragma(msg, T2);
|
|
// static assert(T3.length == 3
|
|
// && T3[0] == 0 && T3[1] == 4 && T3[2] == 8);
|
|
// //
|
|
// struct S4 { char a; union { int b; char c; } int d; }
|
|
// alias FieldOffsetsTuple!(S4) T4;
|
|
// //pragma(msg, FieldTypeTuple!(S4));
|
|
// static assert(T4.length == 4
|
|
// && T4[0] == 0 && T4[1] == 4 && T4[2] == 8);
|
|
// }
|
|
|
|
// /***
|
|
// Get the offsets of the fields of a struct or class.
|
|
// */
|
|
|
|
// template FieldOffsetsTuple(S)
|
|
// {
|
|
// static if (is(S == struct) || is(S == class))
|
|
// alias typeof(S.tupleof) FieldTypeTuple;
|
|
// else
|
|
// static assert(0, "argument is not struct or class");
|
|
// }
|
|
|
|
/***
|
|
Get the primitive types of the fields of a struct or class, in
|
|
topological order.
|
|
|
|
Example:
|
|
----
|
|
struct S1 { int a; float b; }
|
|
struct S2 { char[] a; union { S1 b; S1 * c; } }
|
|
alias RepresentationTypeTuple!(S2) R;
|
|
assert(R.length == 4
|
|
&& is(R[0] == char[]) && is(R[1] == int)
|
|
&& is(R[2] == float) && is(R[3] == S1*));
|
|
----
|
|
*/
|
|
|
|
template RepresentationTypeTuple(T)
|
|
{
|
|
static if (is(T == struct) || is(T == union) || is(T == class))
|
|
{
|
|
alias RepresentationTypeTupleImpl!(FieldTypeTuple!T)
|
|
RepresentationTypeTuple;
|
|
}
|
|
else static if (is(T U == typedef))
|
|
{
|
|
alias RepresentationTypeTuple!U RepresentationTypeTuple;
|
|
}
|
|
else
|
|
{
|
|
alias RepresentationTypeTupleImpl!T
|
|
RepresentationTypeTuple;
|
|
}
|
|
}
|
|
|
|
private template RepresentationTypeTupleImpl(T...)
|
|
{
|
|
static if (T.length == 0)
|
|
{
|
|
alias TypeTuple!() RepresentationTypeTupleImpl;
|
|
}
|
|
else
|
|
{
|
|
static if (is(T[0] == struct) || is(T[0] == union))
|
|
// @@@BUG@@@ this should work
|
|
// alias .RepresentationTypes!(T[0].tupleof)
|
|
// RepresentationTypes;
|
|
alias .RepresentationTypeTupleImpl!(FieldTypeTuple!(T[0]),
|
|
T[1 .. $])
|
|
RepresentationTypeTupleImpl;
|
|
else static if (is(T[0] U == typedef))
|
|
{
|
|
alias .RepresentationTypeTupleImpl!(FieldTypeTuple!(U),
|
|
T[1 .. $])
|
|
RepresentationTypeTupleImpl;
|
|
}
|
|
else
|
|
{
|
|
alias TypeTuple!(T[0], RepresentationTypeTupleImpl!(T[1 .. $]))
|
|
RepresentationTypeTupleImpl;
|
|
}
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
alias RepresentationTypeTuple!(int) S1;
|
|
static assert(is(S1 == TypeTuple!(int)));
|
|
struct S2 { int a; }
|
|
static assert(is(RepresentationTypeTuple!(S2) == TypeTuple!(int)));
|
|
struct S3 { int a; char b; }
|
|
static assert(is(RepresentationTypeTuple!(S3) == TypeTuple!(int, char)));
|
|
struct S4 { S1 a; int b; S3 c; }
|
|
static assert(is(RepresentationTypeTuple!(S4) ==
|
|
TypeTuple!(int, int, int, char)));
|
|
|
|
struct S11 { int a; float b; }
|
|
struct S21 { char[] a; union { S11 b; S11 * c; } }
|
|
alias RepresentationTypeTuple!(S21) R;
|
|
assert(R.length == 4
|
|
&& is(R[0] == char[]) && is(R[1] == int)
|
|
&& is(R[2] == float) && is(R[3] == S11*));
|
|
|
|
class C { int a; float b; }
|
|
alias RepresentationTypeTuple!C R1;
|
|
static assert(R1.length == 2 && is(R1[0] == int) && is(R1[1] == float));
|
|
}
|
|
|
|
/*
|
|
RepresentationOffsets
|
|
*/
|
|
|
|
// private template Repeat(size_t n, T...)
|
|
// {
|
|
// static if (n == 0) alias TypeTuple!() Repeat;
|
|
// else alias TypeTuple!(T, Repeat!(n - 1, T)) Repeat;
|
|
// }
|
|
|
|
// template RepresentationOffsetsImpl(size_t n, T...)
|
|
// {
|
|
// static if (T.length == 0)
|
|
// {
|
|
// alias TypeTuple!() Result;
|
|
// }
|
|
// else
|
|
// {
|
|
// private enum size_t myOffset =
|
|
// ((n + T[0].alignof - 1) / T[0].alignof) * T[0].alignof;
|
|
// static if (!is(T[0] == union))
|
|
// {
|
|
// alias Repeat!(n, FieldTypeTuple!(T[0])).Result
|
|
// Head;
|
|
// }
|
|
// static if (is(T[0] == struct))
|
|
// {
|
|
// alias .RepresentationOffsetsImpl!(n, FieldTypeTuple!(T[0])).Result
|
|
// Head;
|
|
// }
|
|
// else
|
|
// {
|
|
// alias TypeTuple!(myOffset) Head;
|
|
// }
|
|
// alias TypeTuple!(Head,
|
|
// RepresentationOffsetsImpl!(
|
|
// myOffset + T[0].sizeof, T[1 .. $]).Result)
|
|
// Result;
|
|
// }
|
|
// }
|
|
|
|
// template RepresentationOffsets(T)
|
|
// {
|
|
// alias RepresentationOffsetsImpl!(0, T).Result
|
|
// RepresentationOffsets;
|
|
// }
|
|
|
|
// unittest
|
|
// {
|
|
// struct S1 { char c; int i; }
|
|
// alias RepresentationOffsets!(S1) Offsets;
|
|
// static assert(Offsets[0] == 0);
|
|
// //pragma(msg, Offsets[1]);
|
|
// static assert(Offsets[1] == 4);
|
|
// }
|
|
|
|
// hasRawAliasing
|
|
|
|
private template hasRawPointerImpl(T...)
|
|
{
|
|
static if (T.length == 0)
|
|
{
|
|
enum result = false;
|
|
}
|
|
else
|
|
{
|
|
static if (is(T[0] foo : U*, U) && !isFunctionPointer!(T[0]))
|
|
enum hasRawAliasing = !is(U == immutable);
|
|
else static if (is(T[0] foo : U[], U) && !isStaticArray!(T[0]))
|
|
enum hasRawAliasing = !is(U == immutable);
|
|
else static if (isAssociativeArray!(T[0]))
|
|
enum hasRawAliasing = !is(T[0] == immutable);
|
|
else
|
|
enum hasRawAliasing = false;
|
|
enum result = hasRawAliasing || hasRawPointerImpl!(T[1 .. $]).result;
|
|
}
|
|
}
|
|
|
|
private template HasRawLocalPointerImpl(T...)
|
|
{
|
|
static if (T.length == 0)
|
|
{
|
|
enum result = false;
|
|
}
|
|
else
|
|
{
|
|
static if (is(T[0] foo : U*, U) && !isFunctionPointer!(T[0]))
|
|
enum hasRawLocalAliasing = !is(U == immutable) && !is(U == shared);
|
|
else static if (is(T[0] foo : U[], U) && !isStaticArray!(T[0]))
|
|
enum hasRawLocalAliasing = !is(U == immutable) && !is(U == shared);
|
|
else static if (isAssociativeArray!(T[0]))
|
|
enum hasRawLocalAliasing = !is(T[0] == immutable) && !is(T[0] == shared);
|
|
else
|
|
enum hasRawLocalAliasing = false;
|
|
enum result = hasRawLocalAliasing || HasRawLocalPointerImpl!(T[1 .. $]).result;
|
|
}
|
|
}
|
|
|
|
/*
|
|
Statically evaluates to $(D true) if and only if $(D T)'s
|
|
representation contains at least one field of pointer or array type.
|
|
Members of class types are not considered raw pointers. Pointers to
|
|
immutable objects are not considered raw aliasing.
|
|
|
|
Example:
|
|
---
|
|
// simple types
|
|
static assert(!hasRawAliasing!(int));
|
|
static assert(hasRawAliasing!(char*));
|
|
// references aren't raw pointers
|
|
static assert(!hasRawAliasing!(Object));
|
|
// built-in arrays do contain raw pointers
|
|
static assert(hasRawAliasing!(int[]));
|
|
// aggregate of simple types
|
|
struct S1 { int a; double b; }
|
|
static assert(!hasRawAliasing!(S1));
|
|
// indirect aggregation
|
|
struct S2 { S1 a; double b; }
|
|
static assert(!hasRawAliasing!(S2));
|
|
// struct with a pointer member
|
|
struct S3 { int a; double * b; }
|
|
static assert(hasRawAliasing!(S3));
|
|
// struct with an indirect pointer member
|
|
struct S4 { S3 a; double b; }
|
|
static assert(hasRawAliasing!(S4));
|
|
----
|
|
*/
|
|
private template hasRawAliasing(T...)
|
|
{
|
|
enum hasRawAliasing
|
|
= hasRawPointerImpl!(RepresentationTypeTuple!T).result;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
// simple types
|
|
static assert(!hasRawAliasing!(int));
|
|
static assert(hasRawAliasing!(char*));
|
|
// references aren't raw pointers
|
|
static assert(!hasRawAliasing!(Object));
|
|
static assert(!hasRawAliasing!(int));
|
|
struct S1 { int z; }
|
|
static assert(!hasRawAliasing!(S1));
|
|
struct S2 { int* z; }
|
|
static assert(hasRawAliasing!(S2));
|
|
struct S3 { int a; int* z; int c; }
|
|
static assert(hasRawAliasing!(S3));
|
|
struct S4 { int a; int z; int c; }
|
|
static assert(!hasRawAliasing!(S4));
|
|
struct S5 { int a; Object z; int c; }
|
|
static assert(!hasRawAliasing!(S5));
|
|
union S6 { int a; int b; }
|
|
static assert(!hasRawAliasing!(S6));
|
|
union S7 { int a; int * b; }
|
|
static assert(hasRawAliasing!(S7));
|
|
typedef int* S8;
|
|
static assert(hasRawAliasing!(S8));
|
|
enum S9 { a };
|
|
static assert(!hasRawAliasing!(S9));
|
|
// indirect members
|
|
struct S10 { S7 a; int b; }
|
|
static assert(hasRawAliasing!(S10));
|
|
struct S11 { S6 a; int b; }
|
|
static assert(!hasRawAliasing!(S11));
|
|
static assert(hasRawAliasing!(int[string]));
|
|
static assert(!hasRawAliasing!(immutable(int[string])));
|
|
}
|
|
|
|
/*
|
|
Statically evaluates to $(D true) if and only if $(D T)'s
|
|
representation contains at least one non-shared field of pointer or
|
|
array type. Members of class types are not considered raw pointers.
|
|
Pointers to immutable objects are not considered raw aliasing.
|
|
|
|
Example:
|
|
---
|
|
// simple types
|
|
static assert(!hasRawLocalAliasing!(int));
|
|
static assert(hasRawLocalAliasing!(char*));
|
|
static assert(!hasRawLocalAliasing!(shared char*));
|
|
// references aren't raw pointers
|
|
static assert(!hasRawLocalAliasing!(Object));
|
|
// built-in arrays do contain raw pointers
|
|
static assert(hasRawLocalAliasing!(int[]));
|
|
static assert(!hasRawLocalAliasing!(shared int[]));
|
|
// aggregate of simple types
|
|
struct S1 { int a; double b; }
|
|
static assert(!hasRawLocalAliasing!(S1));
|
|
// indirect aggregation
|
|
struct S2 { S1 a; double b; }
|
|
static assert(!hasRawLocalAliasing!(S2));
|
|
// struct with a pointer member
|
|
struct S3 { int a; double * b; }
|
|
static assert(hasRawLocalAliasing!(S3));
|
|
struct S4 { int a; shared double * b; }
|
|
static assert(hasRawLocalAliasing!(S4));
|
|
// struct with an indirect pointer member
|
|
struct S5 { S3 a; double b; }
|
|
static assert(hasRawLocalAliasing!(S5));
|
|
struct S6 { S4 a; double b; }
|
|
static assert(!hasRawLocalAliasing!(S6));
|
|
----
|
|
*/
|
|
|
|
private template hasRawUnsharedAliasing(T...)
|
|
{
|
|
enum hasRawUnsharedAliasing
|
|
= HasRawLocalPointerImpl!(RepresentationTypeTuple!(T)).result;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
// simple types
|
|
static assert(!hasRawUnsharedAliasing!(int));
|
|
static assert(hasRawUnsharedAliasing!(char*));
|
|
static assert(!hasRawUnsharedAliasing!(shared char*));
|
|
// references aren't raw pointers
|
|
static assert(!hasRawUnsharedAliasing!(Object));
|
|
static assert(!hasRawUnsharedAliasing!(int));
|
|
struct S1 { int z; }
|
|
static assert(!hasRawUnsharedAliasing!(S1));
|
|
struct S2 { int* z; }
|
|
static assert(hasRawUnsharedAliasing!(S2));
|
|
struct S3 { shared int* z; }
|
|
static assert(!hasRawUnsharedAliasing!(S3));
|
|
struct S4 { int a; int* z; int c; }
|
|
static assert(hasRawUnsharedAliasing!(S4));
|
|
struct S5 { int a; shared int* z; int c; }
|
|
static assert(!hasRawUnsharedAliasing!(S5));
|
|
struct S6 { int a; int z; int c; }
|
|
static assert(!hasRawUnsharedAliasing!(S6));
|
|
struct S7 { int a; Object z; int c; }
|
|
static assert(!hasRawUnsharedAliasing!(S7));
|
|
union S8 { int a; int b; }
|
|
static assert(!hasRawUnsharedAliasing!(S8));
|
|
union S9 { int a; int * b; }
|
|
static assert(hasRawUnsharedAliasing!(S9));
|
|
union S10 { int a; shared int * b; }
|
|
static assert(!hasRawUnsharedAliasing!(S10));
|
|
typedef int* S11;
|
|
static assert(hasRawUnsharedAliasing!(S11));
|
|
typedef shared int* S12;
|
|
static assert(hasRawUnsharedAliasing!(S12));
|
|
enum S13 { a };
|
|
static assert(!hasRawUnsharedAliasing!(S13));
|
|
// indirect members
|
|
struct S14 { S9 a; int b; }
|
|
static assert(hasRawUnsharedAliasing!(S14));
|
|
struct S15 { S10 a; int b; }
|
|
static assert(!hasRawUnsharedAliasing!(S15));
|
|
struct S16 { S6 a; int b; }
|
|
static assert(!hasRawUnsharedAliasing!(S16));
|
|
static assert(hasRawUnsharedAliasing!(int[string]));
|
|
static assert(!hasRawUnsharedAliasing!(shared(int[string])));
|
|
static assert(!hasRawUnsharedAliasing!(immutable(int[string])));
|
|
}
|
|
|
|
/*
|
|
Statically evaluates to $(D true) if and only if $(D T)'s
|
|
representation includes at least one non-immutable object reference.
|
|
*/
|
|
|
|
private template hasObjects(T...)
|
|
{
|
|
static if (T.length == 0)
|
|
{
|
|
enum hasObjects = false;
|
|
}
|
|
else static if (is(T[0] U == typedef))
|
|
{
|
|
enum hasObjects = hasObjects!(U, T[1 .. $]);
|
|
}
|
|
else static if (is(T[0] == struct))
|
|
{
|
|
enum hasObjects = hasObjects!(
|
|
RepresentationTypeTuple!(T[0]), T[1 .. $]);
|
|
}
|
|
else
|
|
{
|
|
enum hasObjects = ((is(T[0] == class) || is(T[0] == interface))
|
|
&& !is(T[0] == immutable)) || hasObjects!(T[1 .. $]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
Statically evaluates to $(D true) if and only if $(D T)'s
|
|
representation includes at least one non-immutable non-shared object
|
|
reference.
|
|
*/
|
|
|
|
private template hasUnsharedObjects(T...)
|
|
{
|
|
static if (T.length == 0)
|
|
{
|
|
enum hasUnsharedObjects = false;
|
|
}
|
|
else static if (is(T[0] U == typedef))
|
|
{
|
|
enum hasUnsharedObjects = hasUnsharedObjects!(U, T[1 .. $]);
|
|
}
|
|
else static if (is(T[0] == struct))
|
|
{
|
|
enum hasUnsharedObjects = hasUnsharedObjects!(
|
|
RepresentationTypeTuple!(T[0]), T[1 .. $]);
|
|
}
|
|
else
|
|
{
|
|
enum hasUnsharedObjects = ((is(T[0] == class) || is(T[0] == interface)) &&
|
|
!is(T[0] == immutable) && !is(T[0] == shared)) ||
|
|
hasUnsharedObjects!(T[1 .. $]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
Returns $(D true) if and only if $(D T)'s representation includes at
|
|
least one of the following: $(OL $(LI a raw pointer $(D U*) and $(D U)
|
|
is not immutable;) $(LI an array $(D U[]) and $(D U) is not
|
|
immutable;) $(LI a reference to a class or interface type $(D C) and $(D C) is
|
|
not immutable.) $(LI an associative array that is not immutable.)
|
|
$(LI a delegate.))
|
|
*/
|
|
|
|
template hasAliasing(T...)
|
|
{
|
|
enum hasAliasing = hasRawAliasing!(T) || hasObjects!(T) ||
|
|
anySatisfy!(isDelegate, T);
|
|
}
|
|
|
|
// Specialization to special-case std.typecons.Rebindable.
|
|
template hasAliasing(R : Rebindable!R)
|
|
{
|
|
enum hasAliasing = hasAliasing!R;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
struct S1 { int a; Object b; }
|
|
static assert(hasAliasing!(S1));
|
|
struct S2 { string a; }
|
|
static assert(!hasAliasing!(S2));
|
|
struct S3 { int a; immutable Object b; }
|
|
static assert(!hasAliasing!(S3));
|
|
struct X { float[3] vals; }
|
|
static assert(!hasAliasing!X);
|
|
static assert(hasAliasing!(uint[uint]));
|
|
static assert(!hasAliasing!(immutable(uint[uint])));
|
|
static assert(hasAliasing!(void delegate()));
|
|
static assert(!hasAliasing!(void function()));
|
|
|
|
interface I;
|
|
static assert(hasAliasing!I);
|
|
|
|
static assert(hasAliasing!(Rebindable!(const Object)));
|
|
static assert(!hasAliasing!(Rebindable!(immutable Object)));
|
|
static assert(hasAliasing!(Rebindable!(shared Object)));
|
|
static assert(hasAliasing!(Rebindable!(Object)));
|
|
}
|
|
/**
|
|
Returns $(D true) if and only if $(D T)'s representation includes at
|
|
least one of the following: $(OL $(LI a raw pointer $(D U*);) $(LI an
|
|
array $(D U[]);) $(LI a reference to a class type $(D C).)
|
|
$(LI an associative array.) $(LI a delegate.))
|
|
*/
|
|
|
|
template hasIndirections(T)
|
|
{
|
|
enum hasIndirections = hasIndirectionsImpl!(RepresentationTypeTuple!T);
|
|
}
|
|
|
|
template hasIndirectionsImpl(T...)
|
|
{
|
|
static if (!T.length)
|
|
{
|
|
enum hasIndirectionsImpl = false;
|
|
}
|
|
else static if(isFunctionPointer!(T[0]))
|
|
{
|
|
enum hasIndirectionsImpl = hasIndirectionsImpl!(T[1 .. $]);
|
|
}
|
|
else static if(isStaticArray!(T[0]))
|
|
{
|
|
enum hasIndirectionsImpl = hasIndirectionsImpl!(T[1 .. $]) ||
|
|
hasIndirectionsImpl!(RepresentationTypeTuple!(typeof(T[0].init[0])));
|
|
}
|
|
else
|
|
{
|
|
enum hasIndirectionsImpl = isPointer!(T[0]) || isDynamicArray!(T[0]) ||
|
|
is (T[0] : const(Object)) || isAssociativeArray!(T[0]) ||
|
|
isDelegate!(T[0]) || is(T[0] == interface)
|
|
|| hasIndirectionsImpl!(T[1 .. $]);
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
struct S1 { int a; Object b; }
|
|
static assert(hasIndirections!(S1));
|
|
struct S2 { string a; }
|
|
static assert(hasIndirections!(S2));
|
|
struct S3 { int a; immutable Object b; }
|
|
static assert(hasIndirections!(S3));
|
|
static assert(hasIndirections!(int[string]));
|
|
static assert(hasIndirections!(void delegate()));
|
|
|
|
interface I;
|
|
static assert(hasIndirections!I);
|
|
static assert(!hasIndirections!(void function()));
|
|
static assert(hasIndirections!(void*[1]));
|
|
static assert(!hasIndirections!(byte[1]));
|
|
}
|
|
|
|
// These are for backwards compatibility, are intentionally lacking ddoc,
|
|
// and should eventually be deprecated.
|
|
alias hasUnsharedAliasing hasLocalAliasing;
|
|
alias hasRawUnsharedAliasing hasRawLocalAliasing;
|
|
alias hasUnsharedObjects hasLocalObjects;
|
|
|
|
/**
|
|
Returns $(D true) if and only if $(D T)'s representation includes at
|
|
least one of the following: $(OL $(LI a raw pointer $(D U*) and $(D U)
|
|
is not immutable or shared;) $(LI an array $(D U[]) and $(D U) is not
|
|
immutable or shared;) $(LI a reference to a class type $(D C) and
|
|
$(D C) is not immutable or shared.) $(LI an associative array that is not
|
|
immutable or shared.) $(LI a delegate that is not shared.))
|
|
*/
|
|
|
|
template hasUnsharedAliasing(T...)
|
|
{
|
|
enum hasUnsharedAliasing = hasRawUnsharedAliasing!(T) ||
|
|
anySatisfy!(unsharedDelegate, T) || hasUnsharedObjects!(T);
|
|
}
|
|
|
|
// Specialization to special-case std.typecons.Rebindable.
|
|
template hasUnsharedAliasing(R : Rebindable!R)
|
|
{
|
|
enum hasUnsharedAliasing = hasUnsharedAliasing!R;
|
|
}
|
|
|
|
private template unsharedDelegate(T)
|
|
{
|
|
enum bool unsharedDelegate = isDelegate!T && !is(T == shared);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
struct S1 { int a; Object b; }
|
|
static assert(hasUnsharedAliasing!(S1));
|
|
struct S2 { string a; }
|
|
static assert(!hasUnsharedAliasing!(S2));
|
|
struct S3 { int a; immutable Object b; }
|
|
static assert(!hasUnsharedAliasing!(S3));
|
|
|
|
struct S4 { int a; shared Object b; }
|
|
static assert(!hasUnsharedAliasing!(S4));
|
|
struct S5 { char[] a; }
|
|
static assert(hasUnsharedAliasing!(S5));
|
|
struct S6 { shared char[] b; }
|
|
static assert(!hasUnsharedAliasing!(S6));
|
|
struct S7 { float[3] vals; }
|
|
static assert(!hasUnsharedAliasing!(S7));
|
|
|
|
static assert(hasUnsharedAliasing!(uint[uint]));
|
|
static assert(hasUnsharedAliasing!(void delegate()));
|
|
static assert(!hasUnsharedAliasing!(shared(void delegate())));
|
|
static assert(!hasUnsharedAliasing!(void function()));
|
|
|
|
interface I {}
|
|
static assert(hasUnsharedAliasing!I);
|
|
|
|
static assert(hasUnsharedAliasing!(Rebindable!(const Object)));
|
|
static assert(!hasUnsharedAliasing!(Rebindable!(immutable Object)));
|
|
static assert(!hasUnsharedAliasing!(Rebindable!(shared Object)));
|
|
static assert(hasUnsharedAliasing!(Rebindable!(Object)));
|
|
}
|
|
|
|
/**
|
|
True if $(D S) or any type embedded directly in the representation of $(D S)
|
|
defines an elaborate copy constructor. Elaborate copy constructors are
|
|
introduced by defining $(D this(this)) for a $(D struct). (Non-struct types
|
|
never have elaborate copy constructors.)
|
|
*/
|
|
template hasElaborateCopyConstructor(S)
|
|
{
|
|
static if(!is(S == struct))
|
|
{
|
|
enum bool hasElaborateCopyConstructor = false;
|
|
}
|
|
else
|
|
{
|
|
enum hasElaborateCopyConstructor = is(typeof({
|
|
S s;
|
|
return &s.__postblit;
|
|
})) || anySatisfy!(.hasElaborateCopyConstructor, typeof(S.tupleof));
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(!hasElaborateCopyConstructor!int);
|
|
struct S
|
|
{
|
|
this(this) {}
|
|
}
|
|
static assert(hasElaborateCopyConstructor!S);
|
|
|
|
struct S2
|
|
{
|
|
uint num;
|
|
}
|
|
|
|
struct S3
|
|
{
|
|
uint num;
|
|
S s;
|
|
}
|
|
|
|
static assert(!hasElaborateCopyConstructor!S2);
|
|
static assert(hasElaborateCopyConstructor!S3);
|
|
}
|
|
|
|
/**
|
|
True if $(D S) or any type directly embedded in the representation of $(D S)
|
|
defines an elaborate assignmentq. Elaborate assignments are introduced by
|
|
defining $(D opAssign(typeof(this))) or $(D opAssign(ref typeof(this)))
|
|
for a $(D struct). (Non-struct types never have elaborate assignments.)
|
|
*/
|
|
template hasElaborateAssign(S)
|
|
{
|
|
static if(!is(S == struct))
|
|
{
|
|
enum bool hasElaborateAssign = false;
|
|
}
|
|
else
|
|
{
|
|
enum hasElaborateAssign = is(typeof(S.init.opAssign(S.init))) ||
|
|
anySatisfy!(.hasElaborateAssign, typeof(S.tupleof));
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(!hasElaborateAssign!int);
|
|
struct S { void opAssign(S) {} }
|
|
static assert(hasElaborateAssign!S);
|
|
struct S1 { void opAssign(ref S1) {} }
|
|
static assert(hasElaborateAssign!S1);
|
|
struct S2 { void opAssign(S1) {} }
|
|
static assert(!hasElaborateAssign!S2);
|
|
struct S3 { S s; }
|
|
static assert(hasElaborateAssign!S3);
|
|
}
|
|
|
|
/**
|
|
True if $(D S) or any type directly embedded in the representation
|
|
of $(D S) defines an elaborate destructor. Elaborate destructors
|
|
are introduced by defining $(D ~this()) for a $(D
|
|
struct). (Non-struct types never have elaborate destructors, even
|
|
though classes may define $(D ~this()).)
|
|
*/
|
|
template hasElaborateDestructor(S)
|
|
{
|
|
static if(!is(S == struct))
|
|
{
|
|
enum bool hasElaborateDestructor = false;
|
|
}
|
|
else
|
|
{
|
|
enum hasElaborateDestructor = is(typeof({S s; return &s.__dtor;}))
|
|
|| anySatisfy!(.hasElaborateDestructor, typeof(S.tupleof));
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(!hasElaborateDestructor!int);
|
|
static struct S1 { }
|
|
static assert(!hasElaborateDestructor!S1);
|
|
static struct S2 { ~this() {} }
|
|
static assert(hasElaborateDestructor!S2);
|
|
static struct S3 { S2 field; }
|
|
static assert(hasElaborateDestructor!S3);
|
|
}
|
|
|
|
/**
|
|
Yields $(D true) if and only if $(D T) is a $(D struct) or a $(D
|
|
class) that defines a symbol called $(D name).
|
|
*/
|
|
template hasMember(T, string name)
|
|
{
|
|
static if (is(T == struct) || is(T == class))
|
|
{
|
|
enum bool hasMember =
|
|
staticIndexOf!(name, __traits(allMembers, T)) != -1;
|
|
}
|
|
else
|
|
{
|
|
enum bool hasMember = false;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
//pragma(msg, __traits(allMembers, void delegate()));
|
|
static assert(!hasMember!(int, "blah"));
|
|
struct S1 { int blah; }
|
|
static assert(hasMember!(S1, "blah"));
|
|
struct S2 { int blah(); }
|
|
static assert(hasMember!(S2, "blah"));
|
|
struct C1 { int blah; }
|
|
static assert(hasMember!(C1, "blah"));
|
|
struct C2 { int blah(); }
|
|
static assert(hasMember!(C2, "blah"));
|
|
}
|
|
|
|
|
|
/**
|
|
Retrieves the members of an enumerated type $(D enum E).
|
|
|
|
Params:
|
|
E = An enumerated type. $(D E) may have duplicated values.
|
|
|
|
Returns:
|
|
Static tuple composed of the members of the enumerated type $(D E).
|
|
The members are arranged in the same order as declared in $(D E).
|
|
|
|
Note:
|
|
Returned values are strictly typed with $(D E). Thus, the following code
|
|
does not work without the explicit cast:
|
|
--------------------
|
|
enum E : int { a, b, c }
|
|
int[] abc = cast(int[]) [ EnumMembers!E ];
|
|
--------------------
|
|
Cast is not necessary if the type of the variable is inferred. See the
|
|
example below.
|
|
|
|
Examples:
|
|
Creating an array of enumerated values:
|
|
--------------------
|
|
enum Sqrts : real
|
|
{
|
|
one = 1,
|
|
two = 1.41421,
|
|
three = 1.73205,
|
|
}
|
|
auto sqrts = [ EnumMembers!Sqrts ];
|
|
assert(sqrts == [ Sqrts.one, Sqrts.two, Sqrts.three ]);
|
|
--------------------
|
|
|
|
A generic function $(D rank(v)) in the following example uses this
|
|
template for finding a member $(D e) in an enumerated type $(D E).
|
|
--------------------
|
|
// Returns i if e is the i-th enumerator of E.
|
|
size_t rank(E)(E e)
|
|
if (is(E == enum))
|
|
{
|
|
foreach (i, member; EnumMembers!E)
|
|
{
|
|
if (e == member)
|
|
return i;
|
|
}
|
|
assert(0, "Not an enum member");
|
|
}
|
|
|
|
enum Mode
|
|
{
|
|
read = 1,
|
|
write = 2,
|
|
map = 4,
|
|
}
|
|
assert(rank(Mode.read ) == 0);
|
|
assert(rank(Mode.write) == 1);
|
|
assert(rank(Mode.map ) == 2);
|
|
--------------------
|
|
*/
|
|
template EnumMembers(E)
|
|
if (is(E == enum))
|
|
{
|
|
alias EnumSpecificMembers!(E, __traits(allMembers, E)) EnumMembers;
|
|
}
|
|
|
|
private template EnumSpecificMembers(Enum, names...)
|
|
{
|
|
static if (names.length > 0)
|
|
{
|
|
alias TypeTuple!(
|
|
WithIdentifier!(names[0])
|
|
.Symbolize!(__traits(getMember, Enum, names[0])),
|
|
EnumSpecificMembers!(Enum, names[1 .. $])
|
|
) EnumSpecificMembers;
|
|
}
|
|
else
|
|
{
|
|
alias TypeTuple!() EnumSpecificMembers;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
enum A { a }
|
|
static assert([ EnumMembers!A ] == [ A.a ]);
|
|
enum B { a, b, c, d, e }
|
|
static assert([ EnumMembers!B ] == [ B.a, B.b, B.c, B.d, B.e ]);
|
|
}
|
|
|
|
unittest // typed enums
|
|
{
|
|
enum A : string { a = "alpha", b = "beta" }
|
|
static assert([ EnumMembers!A ] == [ A.a, A.b ]);
|
|
|
|
static struct S
|
|
{
|
|
int value;
|
|
int opCmp(S rhs) const nothrow { return value - rhs.value; }
|
|
}
|
|
enum B : S { a = S(1), b = S(2), c = S(3) }
|
|
static assert([ EnumMembers!B ] == [ B.a, B.b, B.c ]);
|
|
}
|
|
|
|
unittest // duplicated values
|
|
{
|
|
enum A
|
|
{
|
|
a = 0, b = 0,
|
|
c = 1, d = 1, e
|
|
}
|
|
static assert([ EnumMembers!A ] == [ A.a, A.b, A.c, A.d, A.e ]);
|
|
}
|
|
|
|
// Supply the specified identifier to an constant value.
|
|
//
|
|
// The identifier of each enum member will be exposed via this template
|
|
// once the BUG4732 is fixed.
|
|
//
|
|
// enum E { member }
|
|
// assert(__traits(identifier, EnumMembers!E[0]) == "member");
|
|
//
|
|
private template WithIdentifier(string ident)
|
|
{
|
|
static if (ident == "Symbolize")
|
|
{
|
|
template Symbolize(alias value)
|
|
{
|
|
enum Symbolize = value;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mixin("template Symbolize(alias "~ ident ~")"
|
|
~"{"
|
|
~"alias "~ ident ~" Symbolize;"
|
|
~"}");
|
|
}
|
|
}
|
|
|
|
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
// Classes and Interfaces
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
|
|
/***
|
|
* Get a $(D_PARAM TypeTuple) of the base class and base interfaces of
|
|
* this class or interface. $(D_PARAM BaseTypeTuple!(Object)) returns
|
|
* the empty type tuple.
|
|
*
|
|
* Example:
|
|
* ---
|
|
* import std.traits, std.typetuple, std.stdio;
|
|
* interface I { }
|
|
* class A { }
|
|
* class B : A, I { }
|
|
*
|
|
* void main()
|
|
* {
|
|
* alias BaseTypeTuple!(B) TL;
|
|
* writeln(typeid(TL)); // prints: (A,I)
|
|
* }
|
|
* ---
|
|
*/
|
|
|
|
template BaseTypeTuple(A)
|
|
{
|
|
static if (is(A P == super))
|
|
alias P BaseTypeTuple;
|
|
else
|
|
static assert(0, "argument is not a class or interface");
|
|
}
|
|
|
|
unittest
|
|
{
|
|
interface I1 { }
|
|
interface I2 { }
|
|
interface I12 : I1, I2 { }
|
|
static assert(is(BaseTypeTuple!I12 == TypeTuple!(I1, I2)));
|
|
interface I3 : I1 { }
|
|
interface I123 : I1, I2, I3 { }
|
|
static assert(is(BaseTypeTuple!I123 == TypeTuple!(I1, I2, I3)));
|
|
}
|
|
|
|
unittest
|
|
{
|
|
interface I1 { }
|
|
interface I2 { }
|
|
class A { }
|
|
class C : A, I1, I2 { }
|
|
|
|
alias BaseTypeTuple!(C) TL;
|
|
assert(TL.length == 3);
|
|
assert(is (TL[0] == A));
|
|
assert(is (TL[1] == I1));
|
|
assert(is (TL[2] == I2));
|
|
|
|
assert(BaseTypeTuple!(Object).length == 0);
|
|
}
|
|
|
|
/**
|
|
* Get a $(D_PARAM TypeTuple) of $(I all) base classes of this class,
|
|
* in decreasing order. Interfaces are not included. $(D_PARAM
|
|
* BaseClassesTuple!(Object)) yields the empty type tuple.
|
|
*
|
|
* Example:
|
|
* ---
|
|
* import std.traits, std.typetuple, std.stdio;
|
|
* interface I { }
|
|
* class A { }
|
|
* class B : A, I { }
|
|
* class C : B { }
|
|
*
|
|
* void main()
|
|
* {
|
|
* alias BaseClassesTuple!(C) TL;
|
|
* writeln(typeid(TL)); // prints: (B,A,Object)
|
|
* }
|
|
* ---
|
|
*/
|
|
|
|
template BaseClassesTuple(T)
|
|
{
|
|
static if (is(T == Object))
|
|
{
|
|
alias TypeTuple!() BaseClassesTuple;
|
|
}
|
|
static if (is(BaseTypeTuple!(T)[0] == Object))
|
|
{
|
|
alias TypeTuple!(Object) BaseClassesTuple;
|
|
}
|
|
else
|
|
{
|
|
alias TypeTuple!(BaseTypeTuple!(T)[0],
|
|
BaseClassesTuple!(BaseTypeTuple!(T)[0]))
|
|
BaseClassesTuple;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a $(D_PARAM TypeTuple) of $(I all) interfaces directly or
|
|
* indirectly inherited by this class or interface. Interfaces do not
|
|
* repeat if multiply implemented. $(D_PARAM InterfacesTuple!(Object))
|
|
* yields the empty type tuple.
|
|
*
|
|
* Example:
|
|
* ---
|
|
* import std.traits, std.typetuple, std.stdio;
|
|
* interface I1 { }
|
|
* interface I2 { }
|
|
* class A : I1, I2 { }
|
|
* class B : A, I1 { }
|
|
* class C : B { }
|
|
*
|
|
* void main()
|
|
* {
|
|
* alias InterfacesTuple!(C) TL;
|
|
* writeln(typeid(TL)); // prints: (I1, I2)
|
|
* }
|
|
* ---
|
|
*/
|
|
|
|
template InterfacesTuple(T)
|
|
{
|
|
static if (is(T S == super) && S.length)
|
|
alias NoDuplicates!(InterfacesTuple_Flatten!(S))
|
|
InterfacesTuple;
|
|
else
|
|
alias TypeTuple!() InterfacesTuple;
|
|
}
|
|
|
|
// internal
|
|
private template InterfacesTuple_Flatten(H, T...)
|
|
{
|
|
static if (T.length)
|
|
{
|
|
alias TypeTuple!(
|
|
InterfacesTuple_Flatten!(H),
|
|
InterfacesTuple_Flatten!(T))
|
|
InterfacesTuple_Flatten;
|
|
}
|
|
else
|
|
{
|
|
static if (is(H == interface))
|
|
alias TypeTuple!(H, InterfacesTuple!(H))
|
|
InterfacesTuple_Flatten;
|
|
else
|
|
alias InterfacesTuple!(H) InterfacesTuple_Flatten;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
struct Test1_WorkaroundForBug2986 {
|
|
// doc example
|
|
interface I1 {}
|
|
interface I2 {}
|
|
class A : I1, I2 { }
|
|
class B : A, I1 { }
|
|
class C : B { }
|
|
alias InterfacesTuple!(C) TL;
|
|
static assert(is(TL[0] == I1) && is(TL[1] == I2));
|
|
}
|
|
struct Test2_WorkaroundForBug2986 {
|
|
interface Iaa {}
|
|
interface Iab {}
|
|
interface Iba {}
|
|
interface Ibb {}
|
|
interface Ia : Iaa, Iab {}
|
|
interface Ib : Iba, Ibb {}
|
|
interface I : Ia, Ib {}
|
|
interface J {}
|
|
class B : J {}
|
|
class C : B, Ia, Ib {}
|
|
static assert(is(InterfacesTuple!(I) ==
|
|
TypeTuple!(Ia, Iaa, Iab, Ib, Iba, Ibb)));
|
|
static assert(is(InterfacesTuple!(C) ==
|
|
TypeTuple!(J, Ia, Iaa, Iab, Ib, Iba, Ibb)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a $(D_PARAM TypeTuple) of $(I all) base classes of $(D_PARAM
|
|
* T), in decreasing order, followed by $(D_PARAM T)'s
|
|
* interfaces. $(D_PARAM TransitiveBaseTypeTuple!(Object)) yields the
|
|
* empty type tuple.
|
|
*
|
|
* Example:
|
|
* ---
|
|
* import std.traits, std.typetuple, std.stdio;
|
|
* interface I { }
|
|
* class A { }
|
|
* class B : A, I { }
|
|
* class C : B { }
|
|
*
|
|
* void main()
|
|
* {
|
|
* alias TransitiveBaseTypeTuple!(C) TL;
|
|
* writeln(typeid(TL)); // prints: (B,A,Object,I)
|
|
* }
|
|
* ---
|
|
*/
|
|
|
|
template TransitiveBaseTypeTuple(T)
|
|
{
|
|
static if (is(T == Object))
|
|
alias TypeTuple!() TransitiveBaseTypeTuple;
|
|
else
|
|
alias TypeTuple!(BaseClassesTuple!(T),
|
|
InterfacesTuple!(T))
|
|
TransitiveBaseTypeTuple;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
interface J1 {}
|
|
interface J2 {}
|
|
class B1 {}
|
|
class B2 : B1, J1, J2 {}
|
|
class B3 : B2, J1 {}
|
|
alias TransitiveBaseTypeTuple!(B3) TL;
|
|
assert(TL.length == 5);
|
|
assert(is (TL[0] == B2));
|
|
assert(is (TL[1] == B1));
|
|
assert(is (TL[2] == Object));
|
|
assert(is (TL[3] == J1));
|
|
assert(is (TL[4] == J2));
|
|
|
|
assert(TransitiveBaseTypeTuple!(Object).length == 0);
|
|
}
|
|
|
|
|
|
/**
|
|
Returns a tuple of non-static functions with the name $(D name) declared in the
|
|
class or interface $(D C). Covariant duplicates are shrunk into the most
|
|
derived one.
|
|
|
|
Example:
|
|
--------------------
|
|
interface I { I foo(); }
|
|
class B
|
|
{
|
|
real foo(real v) { return v; }
|
|
}
|
|
class C : B, I
|
|
{
|
|
override C foo() { return this; } // covariant overriding of I.foo()
|
|
}
|
|
alias MemberFunctionsTuple!(C, "foo") foos;
|
|
static assert(foos.length == 2);
|
|
static assert(__traits(isSame, foos[0], C.foo));
|
|
static assert(__traits(isSame, foos[1], B.foo));
|
|
--------------------
|
|
*/
|
|
template MemberFunctionsTuple(C, string name)
|
|
if (is(C == class) || is(C == interface))
|
|
{
|
|
static if (__traits(hasMember, C, name))
|
|
alias MemberFunctionTupleImpl!(C, name).result MemberFunctionsTuple;
|
|
else
|
|
alias TypeTuple!() MemberFunctionsTuple;
|
|
}
|
|
|
|
private template MemberFunctionTupleImpl(C, string name)
|
|
{
|
|
/*
|
|
* First, collect all overloads in the class hierarchy.
|
|
*/
|
|
template CollectOverloads(Node)
|
|
{
|
|
static if (__traits(hasMember, Node, name))
|
|
{
|
|
// Get all overloads in sight (not hidden).
|
|
alias TypeTuple!(__traits(getVirtualFunctions, Node, name)) inSight;
|
|
|
|
// And collect all overloads in ancestor classes to reveal hidden
|
|
// methods. The result may contain duplicates.
|
|
template walkThru(Parents...)
|
|
{
|
|
static if (Parents.length > 0)
|
|
alias TypeTuple!(
|
|
CollectOverloads!(Parents[0]).result,
|
|
walkThru!(Parents[1 .. $])
|
|
) walkThru;
|
|
else
|
|
alias TypeTuple!() walkThru;
|
|
}
|
|
|
|
static if (is(Node Parents == super))
|
|
alias TypeTuple!(inSight, walkThru!(Parents)) result;
|
|
else
|
|
alias TypeTuple!(inSight) result;
|
|
}
|
|
else
|
|
alias TypeTuple!() result; // no overloads in this hierarchy
|
|
}
|
|
|
|
// duplicates in this tuple will be removed by shrink()
|
|
alias CollectOverloads!(C).result overloads;
|
|
|
|
/*
|
|
* Now shrink covariant overloads into one.
|
|
*/
|
|
template shrink(overloads...)
|
|
{
|
|
static if (overloads.length > 0)
|
|
{
|
|
alias shrinkOne!(overloads).result temp;
|
|
alias TypeTuple!(temp[0], shrink!(temp[1 .. $]).result) result;
|
|
}
|
|
else
|
|
alias TypeTuple!() result; // done
|
|
}
|
|
|
|
// .result[0] = the most derived one in the covariant siblings of target
|
|
// .result[1..$] = non-covariant others
|
|
template shrinkOne(/+ alias target, rest... +/ args...)
|
|
{
|
|
alias args[0 .. 1] target; // prevent property functions from being evaluated
|
|
alias args[1 .. $] rest;
|
|
|
|
static if (rest.length > 0)
|
|
{
|
|
alias FunctionTypeOf!(target) Target;
|
|
alias FunctionTypeOf!(rest[0]) Rest0;
|
|
|
|
static if (isCovariantWith!(Target, Rest0))
|
|
// target overrides rest[0] -- erase rest[0].
|
|
alias shrinkOne!(target, rest[1 .. $]).result result;
|
|
else static if (isCovariantWith!(Rest0, Target))
|
|
// rest[0] overrides target -- erase target.
|
|
alias shrinkOne!(rest[0], rest[1 .. $]).result result;
|
|
else
|
|
// target and rest[0] are distinct.
|
|
alias TypeTuple!(
|
|
shrinkOne!(target, rest[1 .. $]).result,
|
|
rest[0] // keep
|
|
) result;
|
|
}
|
|
else
|
|
alias TypeTuple!(target) result; // done
|
|
}
|
|
|
|
// done.
|
|
alias shrink!(overloads).result result;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
interface I { I test(); }
|
|
interface J : I { J test(); }
|
|
interface K { K test(int); }
|
|
class B : I, K
|
|
{
|
|
K test(int) { return this; }
|
|
B test() { return this; }
|
|
static void test(string) { }
|
|
}
|
|
class C : B, J
|
|
{
|
|
override C test() { return this; }
|
|
}
|
|
alias MemberFunctionsTuple!(C, "test") test;
|
|
static assert(test.length == 2);
|
|
static assert(is(FunctionTypeOf!(test[0]) == FunctionTypeOf!(C.test)));
|
|
static assert(is(FunctionTypeOf!(test[1]) == FunctionTypeOf!(K.test)));
|
|
alias MemberFunctionsTuple!(C, "noexist") noexist;
|
|
static assert(noexist.length == 0);
|
|
|
|
interface L { int prop() @property; }
|
|
alias MemberFunctionsTuple!(L, "prop") prop;
|
|
static assert(prop.length == 1);
|
|
|
|
interface Test_I
|
|
{
|
|
void foo();
|
|
void foo(int);
|
|
void foo(int, int);
|
|
}
|
|
interface Test : Test_I {}
|
|
alias MemberFunctionsTuple!(Test, "foo") Test_foo;
|
|
static assert(Test_foo.length == 3);
|
|
static assert(is(typeof(&Test_foo[0]) == void function()));
|
|
static assert(is(typeof(&Test_foo[2]) == void function(int)));
|
|
static assert(is(typeof(&Test_foo[1]) == void function(int, int)));
|
|
}
|
|
|
|
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
// Type Conversion
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
|
|
/**
|
|
Get the type that all types can be implicitly converted to. Useful
|
|
e.g. in figuring out an array type from a bunch of initializing
|
|
values. Returns $(D_PARAM void) if passed an empty list, or if the
|
|
types have no common type.
|
|
|
|
Example:
|
|
|
|
----
|
|
alias CommonType!(int, long, short) X;
|
|
assert(is(X == long));
|
|
alias CommonType!(int, char[], short) Y;
|
|
assert(is(Y == void));
|
|
----
|
|
*/
|
|
template CommonType(T...)
|
|
{
|
|
static if (!T.length)
|
|
alias void CommonType;
|
|
else static if (T.length == 1)
|
|
{
|
|
static if(is(typeof(T[0])))
|
|
{
|
|
alias typeof(T[0]) CommonType;
|
|
}
|
|
else
|
|
{
|
|
alias T[0] CommonType;
|
|
}
|
|
}
|
|
else static if (is(typeof(true ? T[0].init : T[1].init) U))
|
|
alias CommonType!(U, T[2 .. $]) CommonType;
|
|
else
|
|
alias void CommonType;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
alias CommonType!(int, long, short) X;
|
|
static assert(is(X == long));
|
|
alias CommonType!(char[], int, long, short) Y;
|
|
static assert(is(Y == void), Y.stringof);
|
|
static assert(is(CommonType!(3) == int));
|
|
static assert(is(CommonType!(double, 4, float) == double));
|
|
static assert(is(CommonType!(string, char[]) == const(char)[]));
|
|
static assert(is(CommonType!(3, 3U) == uint));
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a tuple with all possible target types of an implicit
|
|
* conversion of a value of type $(D_PARAM T).
|
|
*
|
|
* Important note:
|
|
*
|
|
* The possible targets are computed more conservatively than the D
|
|
* 2.005 compiler does, eliminating all dangerous conversions. For
|
|
* example, $(D_PARAM ImplicitConversionTargets!(double)) does not
|
|
* include $(D_PARAM float).
|
|
*/
|
|
|
|
template ImplicitConversionTargets(T)
|
|
{
|
|
static if (is(T == bool))
|
|
alias TypeTuple!(byte, ubyte, short, ushort, int, uint, long, ulong,
|
|
float, double, real, char, wchar, dchar)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == byte))
|
|
alias TypeTuple!(short, ushort, int, uint, long, ulong,
|
|
float, double, real, char, wchar, dchar)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == ubyte))
|
|
alias TypeTuple!(short, ushort, int, uint, long, ulong,
|
|
float, double, real, char, wchar, dchar)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == short))
|
|
alias TypeTuple!(ushort, int, uint, long, ulong,
|
|
float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == ushort))
|
|
alias TypeTuple!(int, uint, long, ulong, float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == int))
|
|
alias TypeTuple!(long, ulong, float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == uint))
|
|
alias TypeTuple!(long, ulong, float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == long))
|
|
alias TypeTuple!(float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == ulong))
|
|
alias TypeTuple!(float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == float))
|
|
alias TypeTuple!(double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == double))
|
|
alias TypeTuple!(real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == char))
|
|
alias TypeTuple!(wchar, dchar, byte, ubyte, short, ushort,
|
|
int, uint, long, ulong, float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == wchar))
|
|
alias TypeTuple!(wchar, dchar, short, ushort, int, uint, long, ulong,
|
|
float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if (is(T == dchar))
|
|
alias TypeTuple!(wchar, dchar, int, uint, long, ulong,
|
|
float, double, real)
|
|
ImplicitConversionTargets;
|
|
else static if(is(T : Object))
|
|
alias TransitiveBaseTypeTuple!(T) ImplicitConversionTargets;
|
|
// @@@BUG@@@ this should work
|
|
// else static if (isDynamicArray!T && !is(typeof(T.init[0]) == const))
|
|
// alias TypeTuple!(const(typeof(T.init[0]))[]) ImplicitConversionTargets;
|
|
else static if (is(T == char[]))
|
|
alias TypeTuple!(const(char)[]) ImplicitConversionTargets;
|
|
else static if (isDynamicArray!T && !is(typeof(T.init[0]) == const))
|
|
alias TypeTuple!(const(typeof(T.init[0]))[]) ImplicitConversionTargets;
|
|
else static if (is(T : void*))
|
|
alias TypeTuple!(void*) ImplicitConversionTargets;
|
|
else
|
|
alias TypeTuple!() ImplicitConversionTargets;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
assert(is(ImplicitConversionTargets!(double)[0] == real));
|
|
}
|
|
|
|
/**
|
|
Is $(D From) implicitly convertible to $(D To)?
|
|
*/
|
|
|
|
template isImplicitlyConvertible(From, To)
|
|
{
|
|
enum bool isImplicitlyConvertible = is(typeof({
|
|
void fun(To) {}
|
|
From f;
|
|
fun(f);
|
|
}()));
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isImplicitlyConvertible!(immutable(char), char));
|
|
static assert(isImplicitlyConvertible!(const(char), char));
|
|
static assert(isImplicitlyConvertible!(char, wchar));
|
|
static assert(!isImplicitlyConvertible!(wchar, char));
|
|
}
|
|
|
|
/**
|
|
Returns $(D true) iff a value of type $(D Rhs) can be assigned to a variable of
|
|
type $(D Lhs).
|
|
|
|
Examples:
|
|
---
|
|
static assert(isAssignable!(long, int));
|
|
static assert(!isAssignable!(int, long));
|
|
static assert(isAssignable!(const(char)[], string));
|
|
static assert(!isAssignable!(string, char[]));
|
|
---
|
|
*/
|
|
template isAssignable(Lhs, Rhs) {
|
|
enum bool isAssignable = is(typeof({
|
|
Lhs l;
|
|
Rhs r;
|
|
l = r;
|
|
return l;
|
|
}));
|
|
}
|
|
|
|
unittest {
|
|
static assert(isAssignable!(long, int));
|
|
static assert(!isAssignable!(int, long));
|
|
static assert(isAssignable!(const(char)[], string));
|
|
static assert(!isAssignable!(string, char[]));
|
|
}
|
|
|
|
|
|
/*
|
|
Works like $(D isImplicitlyConvertible), except this cares only about storage
|
|
classes of the arguments.
|
|
*/
|
|
private template isStorageClassImplicitlyConvertible(From, To)
|
|
{
|
|
enum isStorageClassImplicitlyConvertible = isImplicitlyConvertible!(
|
|
ModifyTypePreservingSTC!(Pointify, From),
|
|
ModifyTypePreservingSTC!(Pointify, To) );
|
|
}
|
|
private template Pointify(T) { alias void* Pointify; }
|
|
|
|
unittest
|
|
{
|
|
static assert(isStorageClassImplicitlyConvertible!( int, const int));
|
|
static assert(isStorageClassImplicitlyConvertible!(immutable int, const int));
|
|
static assert(! isStorageClassImplicitlyConvertible!(const int, int));
|
|
static assert(! isStorageClassImplicitlyConvertible!(const int, immutable int));
|
|
static assert(! isStorageClassImplicitlyConvertible!(int, shared int));
|
|
static assert(! isStorageClassImplicitlyConvertible!(shared int, int));
|
|
}
|
|
|
|
|
|
/**
|
|
Determines whether the function type $(D F) is covariant with $(D G), i.e.,
|
|
functions of the type $(D F) can override ones of the type $(D G).
|
|
|
|
Example:
|
|
--------------------
|
|
interface I { I clone(); }
|
|
interface J { J clone(); }
|
|
class C : I
|
|
{
|
|
override C clone() // covariant overriding of I.clone()
|
|
{
|
|
return new C;
|
|
}
|
|
}
|
|
|
|
// C.clone() can override I.clone(), indeed.
|
|
static assert(isCovariantWith!(typeof(C.clone), typeof(I.clone)));
|
|
|
|
// C.clone() can't override J.clone(); the return type C is not implicitly
|
|
// convertible to J.
|
|
static assert(isCovariantWith!(typeof(C.clone), typeof(J.clone)));
|
|
--------------------
|
|
*/
|
|
template isCovariantWith(F, G)
|
|
if (is(F == function) && is(G == function))
|
|
{
|
|
static if (is(F : G))
|
|
enum isCovariantWith = true;
|
|
else
|
|
enum isCovariantWith = isCovariantWithImpl!(F, G).yes;
|
|
}
|
|
|
|
private template isCovariantWithImpl(Upr, Lwr)
|
|
{
|
|
/*
|
|
* Check for calling convention: require exact match.
|
|
*/
|
|
template checkLinkage()
|
|
{
|
|
enum ok = functionLinkage!(Upr) == functionLinkage!(Lwr);
|
|
}
|
|
/*
|
|
* Check for variadic parameter: require exact match.
|
|
*/
|
|
template checkVariadicity()
|
|
{
|
|
enum ok = variadicFunctionStyle!(Upr) == variadicFunctionStyle!(Lwr);
|
|
}
|
|
/*
|
|
* Check for function storage class:
|
|
* - overrider can have narrower storage class than base
|
|
*/
|
|
template checkSTC()
|
|
{
|
|
// Note the order of arguments. The convertion order Lwr -> Upr is
|
|
// correct since Upr should be semantically 'narrower' than Lwr.
|
|
enum ok = isStorageClassImplicitlyConvertible!(Lwr, Upr);
|
|
}
|
|
/*
|
|
* Check for function attributes:
|
|
* - require exact match for ref and @property
|
|
* - overrider can add pure and nothrow, but can't remove them
|
|
* - @safe and @trusted are covariant with each other, unremovable
|
|
*/
|
|
template checkAttributes()
|
|
{
|
|
alias FunctionAttribute FA;
|
|
enum uprAtts = functionAttributes!(Upr);
|
|
enum lwrAtts = functionAttributes!(Lwr);
|
|
//
|
|
enum WANT_EXACT = FA.REF | FA.PROPERTY;
|
|
enum SAFETY = FA.SAFE | FA.TRUSTED;
|
|
enum ok =
|
|
( (uprAtts & WANT_EXACT) == (lwrAtts & WANT_EXACT)) &&
|
|
( (uprAtts & FA.PURE ) >= (lwrAtts & FA.PURE )) &&
|
|
( (uprAtts & FA.NOTHROW) >= (lwrAtts & FA.NOTHROW)) &&
|
|
(!!(uprAtts & SAFETY ) >= !!(lwrAtts & SAFETY )) ;
|
|
}
|
|
/*
|
|
* Check for return type: usual implicit convertion.
|
|
*/
|
|
template checkReturnType()
|
|
{
|
|
enum ok = is(ReturnType!(Upr) : ReturnType!(Lwr));
|
|
}
|
|
/*
|
|
* Check for parameters:
|
|
* - require exact match for types (cf. bugzilla 3075)
|
|
* - require exact match for in, out, ref and lazy
|
|
* - overrider can add scope, but can't remove
|
|
*/
|
|
template checkParameters()
|
|
{
|
|
alias ParameterStorageClass STC;
|
|
alias ParameterTypeTuple!(Upr) UprParams;
|
|
alias ParameterTypeTuple!(Lwr) LwrParams;
|
|
alias ParameterStorageClassTuple!(Upr) UprPSTCs;
|
|
alias ParameterStorageClassTuple!(Lwr) LwrPSTCs;
|
|
//
|
|
template checkNext(size_t i)
|
|
{
|
|
static if (i < UprParams.length)
|
|
{
|
|
enum uprStc = UprPSTCs[i];
|
|
enum lwrStc = LwrPSTCs[i];
|
|
//
|
|
enum WANT_EXACT = STC.OUT | STC.REF | STC.LAZY;
|
|
enum ok =
|
|
((uprStc & WANT_EXACT) == (lwrStc & WANT_EXACT)) &&
|
|
((uprStc & STC.SCOPE ) >= (lwrStc & STC.SCOPE )) &&
|
|
checkNext!(i + 1).ok;
|
|
}
|
|
else
|
|
enum ok = true; // done
|
|
}
|
|
static if (UprParams.length == LwrParams.length)
|
|
enum ok = is(UprParams == LwrParams) && checkNext!(0).ok;
|
|
else
|
|
enum ok = false;
|
|
}
|
|
|
|
/* run all the checks */
|
|
enum bool yes =
|
|
checkLinkage !().ok &&
|
|
checkVariadicity!().ok &&
|
|
checkSTC !().ok &&
|
|
checkAttributes !().ok &&
|
|
checkReturnType !().ok &&
|
|
checkParameters !().ok ;
|
|
}
|
|
|
|
version (unittest) private template isCovariantWith(alias f, alias g)
|
|
{
|
|
enum bool isCovariantWith = isCovariantWith!(typeof(f), typeof(g));
|
|
}
|
|
unittest
|
|
{
|
|
// covariant return type
|
|
interface I {}
|
|
interface J : I {}
|
|
interface BaseA { const(I) test(int); }
|
|
interface DerivA_1 : BaseA { override const(J) test(int); }
|
|
interface DerivA_2 : BaseA { override J test(int); }
|
|
static assert(isCovariantWith!(DerivA_1.test, BaseA.test));
|
|
static assert(isCovariantWith!(DerivA_2.test, BaseA.test));
|
|
static assert(! isCovariantWith!(BaseA.test, DerivA_1.test));
|
|
static assert(! isCovariantWith!(BaseA.test, DerivA_2.test));
|
|
static assert(isCovariantWith!(BaseA.test, BaseA.test));
|
|
static assert(isCovariantWith!(DerivA_1.test, DerivA_1.test));
|
|
static assert(isCovariantWith!(DerivA_2.test, DerivA_2.test));
|
|
|
|
// scope parameter
|
|
interface BaseB { void test( int, int); }
|
|
interface DerivB_1 : BaseB { override void test(scope int, int); }
|
|
interface DerivB_2 : BaseB { override void test( int, scope int); }
|
|
interface DerivB_3 : BaseB { override void test(scope int, scope int); }
|
|
static assert(isCovariantWith!(DerivB_1.test, BaseB.test));
|
|
static assert(isCovariantWith!(DerivB_2.test, BaseB.test));
|
|
static assert(isCovariantWith!(DerivB_3.test, BaseB.test));
|
|
static assert(! isCovariantWith!(BaseB.test, DerivB_1.test));
|
|
static assert(! isCovariantWith!(BaseB.test, DerivB_2.test));
|
|
static assert(! isCovariantWith!(BaseB.test, DerivB_3.test));
|
|
|
|
// function storage class
|
|
interface BaseC { void test() ; }
|
|
interface DerivC_1 : BaseC { override void test() const; }
|
|
static assert(isCovariantWith!(DerivC_1.test, BaseC.test));
|
|
static assert(! isCovariantWith!(BaseC.test, DerivC_1.test));
|
|
|
|
// increasing safety
|
|
interface BaseE { void test() ; }
|
|
interface DerivE_1 : BaseE { override void test() @safe ; }
|
|
interface DerivE_2 : BaseE { override void test() @trusted; }
|
|
static assert(isCovariantWith!(DerivE_1.test, BaseE.test));
|
|
static assert(isCovariantWith!(DerivE_2.test, BaseE.test));
|
|
static assert(! isCovariantWith!(BaseE.test, DerivE_1.test));
|
|
static assert(! isCovariantWith!(BaseE.test, DerivE_2.test));
|
|
|
|
// @safe and @trusted
|
|
interface BaseF
|
|
{
|
|
void test1() @safe;
|
|
void test2() @trusted;
|
|
}
|
|
interface DerivF : BaseF
|
|
{
|
|
override void test1() @trusted;
|
|
override void test2() @safe;
|
|
}
|
|
static assert(isCovariantWith!(DerivF.test1, BaseF.test1));
|
|
static assert(isCovariantWith!(DerivF.test2, BaseF.test2));
|
|
}
|
|
|
|
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
// isSomething
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
|
|
/**
|
|
* Detect whether T is a built-in integral type. Types $(D bool), $(D
|
|
* char), $(D wchar), and $(D dchar) are not considered integral.
|
|
*/
|
|
|
|
template isIntegral(T)
|
|
{
|
|
enum bool isIntegral = staticIndexOf!(Unqual!(T), byte,
|
|
ubyte, short, ushort, int, uint, long, ulong) >= 0;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isIntegral!(byte));
|
|
static assert(isIntegral!(const(byte)));
|
|
static assert(isIntegral!(immutable(byte)));
|
|
static assert(isIntegral!(shared(byte)));
|
|
static assert(isIntegral!(shared(const(byte))));
|
|
|
|
static assert(isIntegral!(ubyte));
|
|
static assert(isIntegral!(const(ubyte)));
|
|
static assert(isIntegral!(immutable(ubyte)));
|
|
static assert(isIntegral!(shared(ubyte)));
|
|
static assert(isIntegral!(shared(const(ubyte))));
|
|
|
|
static assert(isIntegral!(short));
|
|
static assert(isIntegral!(const(short)));
|
|
static assert(isIntegral!(immutable(short)));
|
|
static assert(isIntegral!(shared(short)));
|
|
static assert(isIntegral!(shared(const(short))));
|
|
|
|
static assert(isIntegral!(ushort));
|
|
static assert(isIntegral!(const(ushort)));
|
|
static assert(isIntegral!(immutable(ushort)));
|
|
static assert(isIntegral!(shared(ushort)));
|
|
static assert(isIntegral!(shared(const(ushort))));
|
|
|
|
static assert(isIntegral!(int));
|
|
static assert(isIntegral!(const(int)));
|
|
static assert(isIntegral!(immutable(int)));
|
|
static assert(isIntegral!(shared(int)));
|
|
static assert(isIntegral!(shared(const(int))));
|
|
|
|
static assert(isIntegral!(uint));
|
|
static assert(isIntegral!(const(uint)));
|
|
static assert(isIntegral!(immutable(uint)));
|
|
static assert(isIntegral!(shared(uint)));
|
|
static assert(isIntegral!(shared(const(uint))));
|
|
|
|
static assert(isIntegral!(long));
|
|
static assert(isIntegral!(const(long)));
|
|
static assert(isIntegral!(immutable(long)));
|
|
static assert(isIntegral!(shared(long)));
|
|
static assert(isIntegral!(shared(const(long))));
|
|
|
|
static assert(isIntegral!(ulong));
|
|
static assert(isIntegral!(const(ulong)));
|
|
static assert(isIntegral!(immutable(ulong)));
|
|
static assert(isIntegral!(shared(ulong)));
|
|
static assert(isIntegral!(shared(const(ulong))));
|
|
|
|
static assert(!isIntegral!(float));
|
|
}
|
|
|
|
/**
|
|
* Detect whether T is a built-in floating point type.
|
|
*/
|
|
|
|
template isFloatingPoint(T)
|
|
{
|
|
enum bool isFloatingPoint = staticIndexOf!(Unqual!(T),
|
|
float, double, real) >= 0;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
foreach (F; TypeTuple!(float, double, real))
|
|
{
|
|
F a = 5.5;
|
|
static assert(isFloatingPoint!(typeof(a)));
|
|
const F b = 5.5;
|
|
static assert(isFloatingPoint!(typeof(b)));
|
|
immutable F c = 5.5;
|
|
static assert(isFloatingPoint!(typeof(c)));
|
|
}
|
|
foreach (T; TypeTuple!(int, long, char))
|
|
{
|
|
T a;
|
|
static assert(!isFloatingPoint!(typeof(a)));
|
|
const T b = 0;
|
|
static assert(!isFloatingPoint!(typeof(b)));
|
|
immutable T c = 0;
|
|
static assert(!isFloatingPoint!(typeof(c)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
Detect whether T is a built-in numeric type (integral or floating
|
|
point).
|
|
*/
|
|
|
|
template isNumeric(T)
|
|
{
|
|
enum bool isNumeric = isIntegral!(T) || isFloatingPoint!(T);
|
|
}
|
|
|
|
/**
|
|
Detect whether $(D T) is a built-in unsigned numeric type.
|
|
*/
|
|
template isUnsigned(T)
|
|
{
|
|
enum bool isUnsigned = staticIndexOf!(Unqual!T,
|
|
ubyte, ushort, uint, ulong) >= 0;
|
|
}
|
|
|
|
/**
|
|
Detect whether $(D T) is a built-in signed numeric type.
|
|
*/
|
|
template isSigned(T)
|
|
{
|
|
enum bool isSigned = staticIndexOf!(Unqual!T,
|
|
byte, short, int, long, float, double, real) >= 0;
|
|
}
|
|
|
|
/**
|
|
Detect whether T is one of the built-in string types
|
|
*/
|
|
|
|
template isSomeString(T)
|
|
{
|
|
enum isSomeString = isNarrowString!T || is(T : const(dchar[]));
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(!isSomeString!(int));
|
|
static assert(!isSomeString!(int[]));
|
|
static assert(!isSomeString!(byte[]));
|
|
static assert(isSomeString!(char[]));
|
|
static assert(isSomeString!(dchar[]));
|
|
static assert(isSomeString!(string));
|
|
static assert(isSomeString!(wstring));
|
|
static assert(isSomeString!(dstring));
|
|
static assert(isSomeString!(char[4]));
|
|
}
|
|
|
|
template isNarrowString(T)
|
|
{
|
|
enum isNarrowString = is(T : const(char[])) || is(T : const(wchar[]));
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(!isNarrowString!(int));
|
|
static assert(!isNarrowString!(int[]));
|
|
static assert(!isNarrowString!(byte[]));
|
|
static assert(isNarrowString!(char[]));
|
|
static assert(!isNarrowString!(dchar[]));
|
|
static assert(isNarrowString!(string));
|
|
static assert(isNarrowString!(wstring));
|
|
static assert(!isNarrowString!(dstring));
|
|
static assert(isNarrowString!(char[4]));
|
|
}
|
|
|
|
/**
|
|
Detect whether T is one of the built-in character types
|
|
*/
|
|
|
|
template isSomeChar(T)
|
|
{
|
|
enum isSomeChar = staticIndexOf!(Unqual!T, char, wchar, dchar) >= 0;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(!isSomeChar!(int));
|
|
static assert(!isSomeChar!(int));
|
|
static assert(!isSomeChar!(byte));
|
|
static assert(isSomeChar!(char));
|
|
static assert(isSomeChar!(dchar));
|
|
static assert(!isSomeChar!(string));
|
|
static assert(!isSomeChar!(wstring));
|
|
static assert(!isSomeChar!(dstring));
|
|
static assert(!isSomeChar!(char[4]));
|
|
static assert(isSomeChar!(immutable(char)));
|
|
}
|
|
|
|
/**
|
|
* Detect whether T is an associative array type
|
|
*/
|
|
|
|
template isAssociativeArray(T)
|
|
{
|
|
enum bool isAssociativeArray = __traits(isAssociativeArray, T);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
struct Foo {
|
|
@property uint[] keys() {
|
|
return null;
|
|
}
|
|
|
|
@property uint[] values() {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
static assert(!isAssociativeArray!(Foo));
|
|
static assert(!isAssociativeArray!(int));
|
|
static assert(!isAssociativeArray!(int[]));
|
|
static assert(isAssociativeArray!(int[int]));
|
|
static assert(isAssociativeArray!(int[string]));
|
|
static assert(isAssociativeArray!(immutable(char[5])[int]));
|
|
}
|
|
|
|
/**
|
|
* Detect whether type T is a static array.
|
|
*/
|
|
template isStaticArray(T : U[N], U, size_t N)
|
|
{
|
|
enum bool isStaticArray = true;
|
|
}
|
|
|
|
template isStaticArray(T)
|
|
{
|
|
enum bool isStaticArray = false;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert (isStaticArray!(int[51]));
|
|
static assert (isStaticArray!(int[][2]));
|
|
static assert (isStaticArray!(char[][int][11]));
|
|
static assert (!isStaticArray!(const(int)[]));
|
|
static assert (!isStaticArray!(immutable(int)[]));
|
|
static assert (!isStaticArray!(const(int)[4][]));
|
|
static assert (!isStaticArray!(int[]));
|
|
static assert (!isStaticArray!(int[char]));
|
|
static assert (!isStaticArray!(int[1][]));
|
|
static assert (isStaticArray!(immutable char[13u]));
|
|
static assert (isStaticArray!(const(real)[1]));
|
|
static assert (isStaticArray!(const(real)[1][1]));
|
|
static assert (isStaticArray!(void[0]));
|
|
static assert (!isStaticArray!(int[int]));
|
|
static assert (!isStaticArray!(int));
|
|
}
|
|
|
|
/**
|
|
* Detect whether type T is a dynamic array.
|
|
*/
|
|
template isDynamicArray(T, U = void)
|
|
{
|
|
enum bool isDynamicArray = false;
|
|
}
|
|
|
|
template isDynamicArray(T : U[], U)
|
|
{
|
|
enum bool isDynamicArray = !isStaticArray!(T);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isDynamicArray!(int[]));
|
|
static assert(!isDynamicArray!(int[5]));
|
|
}
|
|
|
|
/**
|
|
* Detect whether type T is an array.
|
|
*/
|
|
template isArray(T)
|
|
{
|
|
enum bool isArray = isStaticArray!(T) || isDynamicArray!(T);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isArray!(int[]));
|
|
static assert(isArray!(int[5]));
|
|
static assert(!isArray!(uint));
|
|
static assert(!isArray!(uint[uint]));
|
|
static assert(isArray!(void[]));
|
|
}
|
|
|
|
/**
|
|
* Detect whether type $(D T) is a pointer.
|
|
*/
|
|
template isPointer(T)
|
|
{
|
|
static if (is(T P == U*, U))
|
|
{
|
|
enum bool isPointer = true;
|
|
}
|
|
else
|
|
{
|
|
enum bool isPointer = false;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isPointer!(int*));
|
|
static assert(!isPointer!(uint));
|
|
static assert(!isPointer!(uint[uint]));
|
|
static assert(!isPointer!(char[]));
|
|
static assert(isPointer!(void*));
|
|
}
|
|
|
|
/**
|
|
Returns the target type of a pointer.
|
|
*/
|
|
template pointerTarget(T : T*) {
|
|
alias T pointerTarget;
|
|
}
|
|
|
|
unittest {
|
|
static assert(is(pointerTarget!(int*) == int));
|
|
static assert(!is(pointerTarget!int));
|
|
static assert(is(pointerTarget!(long*) == long));
|
|
}
|
|
|
|
/**
|
|
* Returns $(D true) if T can be iterated over using a $(D foreach) loop with
|
|
* a single loop variable of automatically inferred type, regardless of how
|
|
* the $(D foreach) loop is implemented. This includes ranges, structs/classes
|
|
* that define $(D opApply) with a single loop variable, and builtin dynamic,
|
|
* static and associative arrays.
|
|
*/
|
|
template isIterable(T)
|
|
{
|
|
static if (is(typeof({foreach(elem; T.init) {}}))) {
|
|
enum bool isIterable = true;
|
|
} else {
|
|
enum bool isIterable = false;
|
|
}
|
|
}
|
|
|
|
unittest {
|
|
struct OpApply
|
|
{
|
|
int opApply(int delegate(ref uint) dg) { assert(0); }
|
|
}
|
|
|
|
struct Range
|
|
{
|
|
uint front() { assert(0); }
|
|
void popFront() { assert(0); }
|
|
enum bool empty = false;
|
|
}
|
|
|
|
static assert(isIterable!(uint[]));
|
|
static assert(!isIterable!(uint));
|
|
static assert(isIterable!(OpApply));
|
|
static assert(isIterable!(uint[string]));
|
|
static assert(isIterable!(Range));
|
|
}
|
|
|
|
/*
|
|
* Returns true if T is not const or immutable. Note that isMutable is true for
|
|
* string, or immutable(char)[], because the 'head' is mutable.
|
|
*/
|
|
template isMutable(T)
|
|
{
|
|
enum isMutable = !is(T == const) && !is(T == immutable);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isMutable!int);
|
|
static assert(isMutable!string);
|
|
static assert(isMutable!(shared int));
|
|
static assert(isMutable!(shared const(int)[]));
|
|
|
|
static assert(!isMutable!(const int));
|
|
static assert(!isMutable!(shared(const int)));
|
|
static assert(!isMutable!(immutable string));
|
|
}
|
|
|
|
/**
|
|
* Tells whether the tuple T is an expression tuple.
|
|
*/
|
|
template isExpressionTuple(T ...)
|
|
{
|
|
static if (T.length > 0)
|
|
enum bool isExpressionTuple =
|
|
!is(T[0]) && __traits(compiles, { auto ex = T[0]; }) &&
|
|
isExpressionTuple!(T[1 .. $]);
|
|
else
|
|
enum bool isExpressionTuple = true; // default
|
|
}
|
|
|
|
unittest
|
|
{
|
|
void foo();
|
|
static int bar() { return 42; }
|
|
enum aa = [ 1: -1 ];
|
|
alias int myint;
|
|
|
|
static assert(isExpressionTuple!(42));
|
|
static assert(isExpressionTuple!(aa));
|
|
static assert(isExpressionTuple!("cattywampus", 2.7, aa));
|
|
static assert(isExpressionTuple!(bar()));
|
|
|
|
static assert(! isExpressionTuple!(isExpressionTuple));
|
|
static assert(! isExpressionTuple!(foo));
|
|
static assert(! isExpressionTuple!( (a) { } ));
|
|
static assert(! isExpressionTuple!(int));
|
|
static assert(! isExpressionTuple!(myint));
|
|
}
|
|
|
|
|
|
/**
|
|
Detect whether tuple $(D T) is a type tuple.
|
|
*/
|
|
template isTypeTuple(T...)
|
|
{
|
|
static if (T.length > 0)
|
|
enum bool isTypeTuple = is(T[0]) && isTypeTuple!(T[1 .. $]);
|
|
else
|
|
enum bool isTypeTuple = true; // default
|
|
}
|
|
|
|
unittest
|
|
{
|
|
class C {}
|
|
void func(int) {}
|
|
auto c = new C;
|
|
enum CONST = 42;
|
|
|
|
static assert(isTypeTuple!(int));
|
|
static assert(isTypeTuple!(string));
|
|
static assert(isTypeTuple!(C));
|
|
static assert(isTypeTuple!(typeof(func)));
|
|
static assert(isTypeTuple!(int, char, double));
|
|
|
|
static assert(! isTypeTuple!(c));
|
|
static assert(! isTypeTuple!(isTypeTuple));
|
|
static assert(! isTypeTuple!(CONST));
|
|
}
|
|
|
|
|
|
/**
|
|
Detect whether symbol or type $(D T) is a function pointer.
|
|
*/
|
|
template isFunctionPointer(T...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(T) == 1)
|
|
{
|
|
static if (is(T[0] U) || is(typeof(T[0]) U))
|
|
{
|
|
static if (is(U F : F*) && is(F == function))
|
|
enum bool isFunctionPointer = true;
|
|
else
|
|
enum bool isFunctionPointer = false;
|
|
}
|
|
else
|
|
enum bool isFunctionPointer = false;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static void foo() {}
|
|
void bar() {}
|
|
|
|
auto fpfoo = &foo;
|
|
static assert(isFunctionPointer!(fpfoo));
|
|
static assert(isFunctionPointer!(void function()));
|
|
|
|
auto dgbar = &bar;
|
|
static assert(! isFunctionPointer!(dgbar));
|
|
static assert(! isFunctionPointer!(void delegate()));
|
|
static assert(! isFunctionPointer!(foo));
|
|
static assert(! isFunctionPointer!(bar));
|
|
|
|
static assert(!isFunctionPointer!((int a) {}));
|
|
}
|
|
|
|
/**
|
|
Detect whether $(D T) is a delegate.
|
|
*/
|
|
template isDelegate(T...)
|
|
if(staticLength!T == 1)
|
|
{
|
|
enum bool isDelegate = is(T[0] == delegate);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(isDelegate!(void delegate()));
|
|
static assert(isDelegate!(uint delegate(uint)));
|
|
static assert(isDelegate!(shared uint delegate(uint)));
|
|
static assert(!isDelegate!(uint));
|
|
static assert(!isDelegate!(void function()));
|
|
}
|
|
|
|
|
|
/**
|
|
Detect whether symbol or type $(D T) is a function, a function pointer or a delegate.
|
|
*/
|
|
template isSomeFunction(/+@@@BUG4217@@@+/T...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(T) == 1)
|
|
{
|
|
enum bool isSomeFunction = isSomeFunction_bug4333!(T).isSomeFunction;
|
|
}
|
|
private template isSomeFunction_bug4333(T...)
|
|
{
|
|
/+@@@BUG4333@@@+/enum dummy__ = T.length;
|
|
|
|
static if (is(typeof(& T[0]) U : U*) && is(U == function))
|
|
{
|
|
// T is a function symbol.
|
|
enum bool isSomeFunction = true;
|
|
}
|
|
else static if (is(T[0] W) || is(typeof(T[0]) W))
|
|
{
|
|
// T is an expression or a type. Take the type of it and examine.
|
|
static if (is(W F : F*) && is(F == function))
|
|
enum bool isSomeFunction = true; // function pointer
|
|
else
|
|
enum bool isSomeFunction = is(W == function) || is(W == delegate);
|
|
}
|
|
else
|
|
enum bool isSomeFunction = false;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static real func(ref int) { return 0; }
|
|
class C
|
|
{
|
|
real method(ref int) { return 0; }
|
|
real prop() @property { return 0; }
|
|
}
|
|
auto c = new C;
|
|
auto fp = &func;
|
|
auto dg = &c.method;
|
|
real val;
|
|
|
|
static assert(isSomeFunction!(func));
|
|
static assert(isSomeFunction!(C.method));
|
|
static assert(isSomeFunction!(C.prop));
|
|
static assert(isSomeFunction!(c.prop));
|
|
static assert(isSomeFunction!(c.prop));
|
|
static assert(isSomeFunction!(fp));
|
|
static assert(isSomeFunction!(dg));
|
|
static assert(isSomeFunction!(typeof(func)));
|
|
static assert(isSomeFunction!(real function(ref int)));
|
|
static assert(isSomeFunction!(real delegate(ref int)));
|
|
|
|
static assert(! isSomeFunction!(int));
|
|
static assert(! isSomeFunction!(val));
|
|
static assert(! isSomeFunction!(isSomeFunction));
|
|
|
|
static assert(isSomeFunction!((int a) { return a; }));
|
|
}
|
|
|
|
|
|
/**
|
|
Detect whether $(D T) is a callable object, which can be called with the
|
|
function call operator $(D $(LPAREN)...$(RPAREN)).
|
|
*/
|
|
template isCallable(/+@@@BUG4217@@@+/T...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(T) == 1)
|
|
{
|
|
enum bool isCallable = isCallable_bug4333!(T).isCallable;
|
|
}
|
|
private template isCallable_bug4333(T...)
|
|
{
|
|
/+@@@BUG4333@@@+/enum dummy__ = T.length;
|
|
|
|
static if (is(typeof(& T[0].opCall) == delegate))
|
|
// T is a object which has a member function opCall().
|
|
enum bool isCallable = true;
|
|
else static if (is(typeof(& T[0].opCall) V : V*) && is(V == function))
|
|
// T is a type which has a static member function opCall().
|
|
enum bool isCallable = true;
|
|
else
|
|
enum bool isCallable = isSomeFunction!(T);
|
|
}
|
|
|
|
unittest
|
|
{
|
|
interface I { real value() @property; }
|
|
struct S { static int opCall(int) { return 0; } }
|
|
class C { int opCall(int) { return 0; } }
|
|
auto c = new C;
|
|
|
|
static assert( isCallable!(c));
|
|
static assert( isCallable!(S));
|
|
static assert( isCallable!(c.opCall));
|
|
static assert( isCallable!(I.value));
|
|
static assert(!isCallable!(I));
|
|
|
|
static assert(isCallable!((int a) { return a; }));
|
|
}
|
|
|
|
|
|
/**
|
|
Exactly the same as the builtin traits:
|
|
$(D ___traits(_isAbstractFunction, method)).
|
|
*/
|
|
template isAbstractFunction(/+@@@BUG4217@@@+/method...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(method) == 1)
|
|
{
|
|
enum bool isAbstractFunction = __traits(isAbstractFunction, method[0]);
|
|
}
|
|
|
|
|
|
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
// General Types
|
|
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
|
|
/**
|
|
Removes all qualifiers, if any, from type $(D T).
|
|
|
|
Example:
|
|
----
|
|
static assert(is(Unqual!(int) == int));
|
|
static assert(is(Unqual!(const int) == int));
|
|
static assert(is(Unqual!(immutable int) == int));
|
|
static assert(is(Unqual!(shared int) == int));
|
|
static assert(is(Unqual!(shared(const int)) == int));
|
|
----
|
|
*/
|
|
template Unqual(T)
|
|
{
|
|
version (none) // Error: recursive alias declaration @@@BUG1308@@@
|
|
{
|
|
static if (is(T U == const U)) alias Unqual!U Unqual;
|
|
else static if (is(T U == immutable U)) alias Unqual!U Unqual;
|
|
else static if (is(T U == shared U)) alias Unqual!U Unqual;
|
|
else alias T Unqual;
|
|
}
|
|
else // workaround
|
|
{
|
|
static if (is(T U == shared(const U))) alias U Unqual;
|
|
else static if (is(T U == const U )) alias U Unqual;
|
|
else static if (is(T U == immutable U )) alias U Unqual;
|
|
else static if (is(T U == shared U )) alias U Unqual;
|
|
else alias T Unqual;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(is(Unqual!(int) == int));
|
|
static assert(is(Unqual!(const int) == int));
|
|
static assert(is(Unqual!(immutable int) == int));
|
|
static assert(is(Unqual!(shared int) == int));
|
|
static assert(is(Unqual!(shared(const int)) == int));
|
|
alias immutable(int[]) ImmIntArr;
|
|
static assert(is(Unqual!(ImmIntArr) == immutable(int)[]));
|
|
}
|
|
|
|
// [For internal use]
|
|
private template ModifyTypePreservingSTC(alias Modifier, T)
|
|
{
|
|
static if (is(T U == shared(const U))) alias shared(const Modifier!U) ModifyTypePreservingSTC;
|
|
else static if (is(T U == const U )) alias const(Modifier!U) ModifyTypePreservingSTC;
|
|
else static if (is(T U == immutable U )) alias immutable(Modifier!U) ModifyTypePreservingSTC;
|
|
else static if (is(T U == shared U )) alias shared(Modifier!U) ModifyTypePreservingSTC;
|
|
else alias Modifier!T ModifyTypePreservingSTC;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(is(ModifyTypePreservingSTC!(Intify, const real) == const int));
|
|
static assert(is(ModifyTypePreservingSTC!(Intify, immutable real) == immutable int));
|
|
static assert(is(ModifyTypePreservingSTC!(Intify, shared real) == shared int));
|
|
static assert(is(ModifyTypePreservingSTC!(Intify, shared(const real)) == shared(const int)));
|
|
}
|
|
version (unittest) private template Intify(T) { alias int Intify; }
|
|
|
|
/*
|
|
*/
|
|
template StringTypeOf(T) if (isSomeString!T)
|
|
{
|
|
static if (is(T == class) || is(T == struct))
|
|
{
|
|
static if (is(T : const(char[])))
|
|
{
|
|
static if (is(T : char[]))
|
|
alias char[] StringTypeOf;
|
|
else static if (is(T : immutable(char[])))
|
|
alias immutable(char)[] StringTypeOf;
|
|
else
|
|
alias const(char)[] StringTypeOf;
|
|
}
|
|
else static if (is(T : const(wchar[])))
|
|
{
|
|
static if (is(T : wchar[]))
|
|
alias wchar[] StringTypeOf;
|
|
else static if (is(T : immutable(wchar[])))
|
|
alias immutable(wchar)[] StringTypeOf;
|
|
else
|
|
alias const(wchar)[] StringTypeOf;
|
|
}
|
|
else
|
|
{
|
|
static if (is(T : dchar[]))
|
|
alias dchar[] StringTypeOf;
|
|
else static if (is(T : immutable(dchar[])))
|
|
alias immutable(dchar)[] StringTypeOf;
|
|
else
|
|
alias const(dchar)[] StringTypeOf;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
alias T StringTypeOf;
|
|
}
|
|
}
|
|
unittest
|
|
{
|
|
class C(Char, int n)
|
|
{
|
|
static if (n==0) Char[] val;
|
|
static if (n==1) const(Char)[] val;
|
|
static if (n==2) const(Char[]) val;
|
|
static if (n==3) immutable(Char)[] val;
|
|
static if (n==4) immutable(Char[]) val;
|
|
alias val this;
|
|
}
|
|
struct S(Char, int n)
|
|
{
|
|
static if (n==0) Char[] val;
|
|
static if (n==1) const(Char)[] val;
|
|
static if (n==2) const(Char[]) val;
|
|
static if (n==3) immutable(Char)[] val;
|
|
static if (n==4) immutable(Char[]) val;
|
|
alias val this;
|
|
}
|
|
foreach (Char; TypeTuple!(char, wchar, dchar))
|
|
{
|
|
static assert(is(StringTypeOf!(C!(Char, 0)) == Char[]));
|
|
static assert(is(StringTypeOf!(C!(Char, 1)) == const(Char)[]));
|
|
static assert(is(StringTypeOf!(C!(Char, 2)) == const(Char)[])); // cannot get exact string type
|
|
static assert(is(StringTypeOf!(C!(Char, 3)) == immutable(Char)[]));
|
|
static assert(is(StringTypeOf!(C!(Char, 4)) == immutable(Char)[])); // cannot get exact string type
|
|
|
|
|
|
static assert(is(StringTypeOf!(S!(Char, 0)) == Char[]));
|
|
static assert(is(StringTypeOf!(S!(Char, 1)) == const(Char)[]));
|
|
static assert(is(StringTypeOf!(S!(Char, 2)) == const(Char)[])); // cannot get exact string type
|
|
static assert(is(StringTypeOf!(S!(Char, 3)) == immutable(Char)[]));
|
|
static assert(is(StringTypeOf!(S!(Char, 4)) == immutable(Char)[])); // cannot get exact string type
|
|
}
|
|
}
|
|
|
|
/**
|
|
Returns the inferred type of the loop variable when a variable of type T
|
|
is iterated over using a $(D foreach) loop with a single loop variable and
|
|
automatically inferred return type. Note that this may not be the same as
|
|
$(D std.range.ElementType!(Range)) in the case of narrow strings, or if T
|
|
has both opApply and a range interface.
|
|
*/
|
|
template ForeachType(T)
|
|
{
|
|
alias ReturnType!(typeof(
|
|
{
|
|
foreach(elem; T.init) {
|
|
return elem;
|
|
}
|
|
assert(0);
|
|
})) ForeachType;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(is(ForeachType!(uint[]) == uint));
|
|
static assert(is(ForeachType!(string) == immutable(char)));
|
|
static assert(is(ForeachType!(string[string]) == string));
|
|
}
|
|
|
|
|
|
/**
|
|
Strips off all $(D typedef)s (including $(D enum) ones) from type $(D T).
|
|
|
|
Example:
|
|
--------------------
|
|
enum E : int { a }
|
|
typedef E F;
|
|
typedef const F G;
|
|
static assert(is(OriginalType!G == const int));
|
|
--------------------
|
|
*/
|
|
template OriginalType(T)
|
|
{
|
|
alias ModifyTypePreservingSTC!(OriginalTypeImpl, T) OriginalType;
|
|
}
|
|
|
|
private template OriginalTypeImpl(T)
|
|
{
|
|
static if (is(T U == typedef)) alias OriginalType!U OriginalTypeImpl;
|
|
else static if (is(T U == enum)) alias OriginalType!U OriginalTypeImpl;
|
|
else alias T OriginalTypeImpl;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
typedef real T;
|
|
typedef T U;
|
|
enum V : U { a }
|
|
static assert(is(OriginalType!T == real));
|
|
static assert(is(OriginalType!U == real));
|
|
static assert(is(OriginalType!V == real));
|
|
enum E : real { a }
|
|
enum F : E { a = E.a }
|
|
typedef const F G;
|
|
static assert(is(OriginalType!E == real));
|
|
static assert(is(OriginalType!F == real));
|
|
static assert(is(OriginalType!G == const real));
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the corresponding unsigned type for T. T must be a numeric
|
|
* integral type, otherwise a compile-time error occurs.
|
|
*/
|
|
|
|
template Unsigned(T)
|
|
{
|
|
alias ModifyTypePreservingSTC!(UnsignedImpl, OriginalType!T) Unsigned;
|
|
}
|
|
|
|
private template UnsignedImpl(T)
|
|
{
|
|
static if (isUnsigned!(T)) alias T UnsignedImpl;
|
|
else static if (is(T == byte)) alias ubyte UnsignedImpl;
|
|
else static if (is(T == short)) alias ushort UnsignedImpl;
|
|
else static if (is(T == int)) alias uint UnsignedImpl;
|
|
else static if (is(T == long)) alias ulong UnsignedImpl;
|
|
else static assert(false, "Type " ~ T.stringof
|
|
~ " does not have an Unsigned counterpart");
|
|
}
|
|
|
|
unittest
|
|
{
|
|
alias Unsigned!(int) U;
|
|
assert(is(U == uint));
|
|
alias Unsigned!(const(int)) U1;
|
|
assert(is(U1 == const(uint)), U1.stringof);
|
|
alias Unsigned!(immutable(int)) U2;
|
|
assert(is(U2 == immutable(uint)), U2.stringof);
|
|
//struct S {}
|
|
//alias Unsigned!(S) U2;
|
|
//alias Unsigned!(double) U3;
|
|
}
|
|
|
|
/**
|
|
Returns the largest type, i.e. T such that T.sizeof is the largest. If more
|
|
than one type is of the same size, the leftmost argument of these in will be
|
|
returned.
|
|
*/
|
|
template Largest(T...) if(T.length >= 1) {
|
|
static if(T.length == 1) {
|
|
alias T[0] Largest;
|
|
} static if(T.length == 2) {
|
|
static if(T[0].sizeof >= T[1].sizeof) {
|
|
alias T[0] Largest;
|
|
} else {
|
|
alias T[1] Largest;
|
|
}
|
|
} else {
|
|
alias Largest!(Largest!(T[0], T[1]), T[2..$]) Largest;
|
|
}
|
|
}
|
|
|
|
unittest {
|
|
static assert(is(Largest!(uint, ubyte, ulong, real) == real));
|
|
static assert(is(Largest!(ulong, double) == ulong));
|
|
static assert(is(Largest!(double, ulong) == double));
|
|
static assert(is(Largest!(uint, byte, double, short) == double));
|
|
}
|
|
|
|
/**
|
|
Returns the corresponding signed type for T. T must be a numeric integral type,
|
|
otherwise a compile-time error occurs.
|
|
*/
|
|
template Signed(T)
|
|
{
|
|
alias ModifyTypePreservingSTC!(SignedImpl, OriginalType!T) Signed;
|
|
}
|
|
|
|
private template SignedImpl(T)
|
|
{
|
|
static if (isSigned!(T)) alias T SignedImpl;
|
|
else static if (is(T == ubyte)) alias byte SignedImpl;
|
|
else static if (is(T == ushort)) alias short SignedImpl;
|
|
else static if (is(T == uint)) alias int SignedImpl;
|
|
else static if (is(T == ulong)) alias long SignedImpl;
|
|
else static assert(false, "Type " ~ T.stringof
|
|
~ " does not have an Signed counterpart");
|
|
}
|
|
|
|
unittest
|
|
{
|
|
alias Signed!(uint) S;
|
|
assert(is(S == int));
|
|
alias Signed!(const(uint)) S1;
|
|
assert(is(S1 == const(int)), S1.stringof);
|
|
alias Signed!(immutable(uint)) S2;
|
|
assert(is(S2 == immutable(int)), S2.stringof);
|
|
}
|
|
|
|
/**
|
|
* Returns the corresponding unsigned value for $(D x), e.g. if $(D x)
|
|
* has type $(D int), returns $(D cast(uint) x). The advantage
|
|
* compared to the cast is that you do not need to rewrite the cast if
|
|
* $(D x) later changes type to e.g. $(D long).
|
|
*/
|
|
auto unsigned(T)(T x) if (isIntegral!T)
|
|
{
|
|
static if (is(Unqual!T == byte)) return cast(ubyte) x;
|
|
else static if (is(Unqual!T == short)) return cast(ushort) x;
|
|
else static if (is(Unqual!T == int)) return cast(uint) x;
|
|
else static if (is(Unqual!T == long)) return cast(ulong) x;
|
|
else
|
|
{
|
|
static assert(T.min == 0, "Bug in either unsigned or isIntegral");
|
|
return x;
|
|
}
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(is(typeof(unsigned(1 + 1)) == uint));
|
|
}
|
|
|
|
auto unsigned(T)(T x) if (isSomeChar!T)
|
|
{
|
|
// All characters are unsigned
|
|
static assert(T.min == 0);
|
|
return x;
|
|
}
|
|
|
|
/**
|
|
Returns the most negative value of the numeric type T.
|
|
*/
|
|
|
|
template mostNegative(T)
|
|
{
|
|
static if (is(typeof(T.min_normal))) enum mostNegative = -T.max;
|
|
else static if (T.min == 0) enum byte mostNegative = 0;
|
|
else enum mostNegative = T.min;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(mostNegative!(float) == -float.max);
|
|
static assert(mostNegative!(uint) == 0);
|
|
static assert(mostNegative!(long) == long.min);
|
|
}
|
|
|
|
|
|
//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
// Misc.
|
|
//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
|
|
|
|
/**
|
|
Returns the mangled name of symbol or type $(D sth).
|
|
|
|
$(D mangledName) is the same as builtin $(D .mangleof) property, except that
|
|
the correct names of property functions are obtained.
|
|
--------------------
|
|
module test;
|
|
import std.traits : mangledName;
|
|
|
|
class C {
|
|
int value() @property;
|
|
}
|
|
pragma(msg, C.value.mangleof); // prints "i"
|
|
pragma(msg, mangledName!(C.value)); // prints "_D4test1C5valueMFNdZi"
|
|
--------------------
|
|
*/
|
|
template mangledName(sth...)
|
|
if (/+@@@BUG4333@@@+/staticLength!(sth) == 1)
|
|
{
|
|
enum string mangledName = removeDummyEnvelope(Dummy!(sth).Hook.mangleof);
|
|
}
|
|
|
|
private template Dummy(T...) { struct Hook {} }
|
|
|
|
private string removeDummyEnvelope(string s)
|
|
{
|
|
// remove --> S3std6traits ... Z4Hook
|
|
s = s[12 .. $ - 6];
|
|
|
|
// remove --> DIGIT+ __T5Dummy
|
|
foreach (i, c; s)
|
|
{
|
|
if (c < '0' || '9' < c)
|
|
{
|
|
s = s[i .. $];
|
|
break;
|
|
}
|
|
}
|
|
s = s[9 .. $]; // __T5Dummy
|
|
|
|
// remove --> T | V | S
|
|
immutable kind = s[0];
|
|
s = s[1 .. $];
|
|
|
|
if (kind == 'S') // it's a symbol
|
|
{
|
|
/*
|
|
* The mangled symbol name is packed in LName --> Number Name. Here
|
|
* we are chopping off the useless preceding Number, which is the
|
|
* length of Name in decimal notation.
|
|
*
|
|
* NOTE: n = m + Log(m) + 1; n = LName.length, m = Name.length.
|
|
*/
|
|
immutable n = s.length;
|
|
size_t m_upb = 10;
|
|
|
|
foreach (k; 1 .. 5) // k = Log(m_upb)
|
|
{
|
|
if (n < m_upb + k + 1)
|
|
{
|
|
// Now m_upb/10 <= m < m_upb; hence k = Log(m) + 1.
|
|
s = s[k .. $];
|
|
break;
|
|
}
|
|
m_upb *= 10;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
typedef int MyInt;
|
|
MyInt test() { return 0; }
|
|
class C { int value() @property { return 0; } }
|
|
static assert(mangledName!(int) == int.mangleof);
|
|
static assert(mangledName!(C) == C.mangleof);
|
|
//static assert(mangledName!(MyInt)[$ - 7 .. $] == "T5MyInt"); // XXX depends on bug 4237
|
|
//static assert(mangledName!(test)[$ - 7 .. $] == "T5MyInt");
|
|
static assert(mangledName!(C.value)[$ - 12 .. $] == "5valueMFNdZi");
|
|
static assert(mangledName!(mangledName) == "3std6traits11mangledName");
|
|
static assert(mangledName!(removeDummyEnvelope) ==
|
|
"_D3std6traits19removeDummyEnvelopeFAyaZAya");
|
|
int x;
|
|
static assert(mangledName!((int a) { return a+x; })[$ - 5 .. $] == "MFiZi");
|
|
}
|
|
|
|
|
|
/*
|
|
workaround for @@@BUG2234@@@ "allMembers does not return interface members"
|
|
*/
|
|
package template traits_allMembers(Agg)
|
|
{
|
|
static if (is(Agg == class) || is(Agg == interface))
|
|
alias NoDuplicates!( __traits(allMembers, Agg),
|
|
traits_allMembers_ifaces!(InterfacesTuple!(Agg)) )
|
|
traits_allMembers;
|
|
else
|
|
alias TypeTuple!(__traits(allMembers, Agg)) traits_allMembers;
|
|
}
|
|
private template traits_allMembers_ifaces(I...)
|
|
{
|
|
static if (I.length > 0)
|
|
alias TypeTuple!( __traits(allMembers, I[0]),
|
|
traits_allMembers_ifaces!(I[1 .. $]) )
|
|
traits_allMembers_ifaces;
|
|
else
|
|
alias TypeTuple!() traits_allMembers_ifaces;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
interface I { void test(); }
|
|
interface J : I { }
|
|
interface K : J { }
|
|
alias traits_allMembers!(K) names;
|
|
static assert(names.length == 1);
|
|
static assert(names[0] == "test");
|
|
}
|
|
|
|
|
|
|
|
// XXX Select & select should go to another module. (functional or algorithm?)
|
|
|
|
/**
|
|
Aliases itself to $(D T) if the boolean $(D condition) is $(D true)
|
|
and to $(D F) otherwise.
|
|
|
|
Example:
|
|
----
|
|
alias Select!(size_t.sizeof == 4, int, long) Int;
|
|
----
|
|
*/
|
|
template Select(bool condition, T, F)
|
|
{
|
|
static if (condition) alias T Select;
|
|
else alias F Select;
|
|
}
|
|
|
|
unittest
|
|
{
|
|
static assert(is(Select!(true, int, long) == int));
|
|
static assert(is(Select!(false, int, long) == long));
|
|
}
|
|
|
|
/**
|
|
If $(D cond) is $(D true), returns $(D a) without evaluating $(D
|
|
b). Otherwise, returns $(D b) without evaluating $(D a).
|
|
*/
|
|
A select(bool cond : true, A, B)(A a, lazy B b) { return a; }
|
|
/// Ditto
|
|
B select(bool cond : false, A, B)(lazy A a, B b) { return b; }
|
|
|
|
unittest
|
|
{
|
|
real pleasecallme() { return 0; }
|
|
int dontcallme() { assert(0); }
|
|
auto a = select!true(pleasecallme(), dontcallme());
|
|
auto b = select!false(dontcallme(), pleasecallme());
|
|
static assert(is(typeof(a) == real));
|
|
static assert(is(typeof(b) == real));
|
|
}
|