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Use SomethingTypeOf in isSomeThing templates

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This commit is contained in:
k-hara 2012-03-11 23:13:16 +09:00
parent 196fa86364
commit a5cff8017e
1 changed files with 52 additions and 53 deletions
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105
std/traits.d
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@ -3019,27 +3019,11 @@ unittest
*/
template StringTypeOf(T) if (isSomeString!T)
{
alias typeof(T.init[]) StringTypeOf;
//alias ArrayTypeOf!T StringTypeOf;
alias ArrayTypeOf!T StringTypeOf;
}
unittest
{
foreach (Ch; TypeTuple!(char, wchar, dchar))
{
foreach (Char; TypeTuple!(Ch, const(Ch), immutable(Ch)))
{
foreach (Str; TypeTuple!(Char[], const(Char)[], immutable(Char)[]))
{
class C(Str) { Str val; alias val this; }
struct S(Str) { Str val; alias val this; }
static assert(is(StringTypeOf!(C!Str) == Str));
static assert(is(StringTypeOf!(S!Str) == Str));
}
}
}
/+
foreach (T; CharTypeList)
foreach (Q; TypeTuple!(MutableOf, ConstOf, ImmutableOf, WildOf))
{
@ -3059,7 +3043,6 @@ unittest
{
static assert(!is(StringTypeOf!( Q!T[] )));
}
+/
}
/*
@ -3144,13 +3127,20 @@ template BuiltinTypeOf(T)
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
/**
* Detect whether T is a built-in integral type. Types $(D bool), $(D
* char), $(D wchar), and $(D dchar) are not considered integral.
* Detect whether we can treat T as a built-in boolean type.
*/
template isBoolean(T)
{
enum bool isBoolean = is(BooleanTypeOf!T);
}
/**
* Detect whether we can treat T as 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;
enum bool isIntegral = is(IntegralTypeOf!T);
}
unittest
@ -3207,13 +3197,11 @@ unittest
}
/**
* Detect whether T is a built-in floating point type.
* Detect whether we can treat T as a built-in floating point type.
*/
template isFloatingPoint(T)
{
enum bool isFloatingPoint = staticIndexOf!(Unqual!(T),
float, double, real) >= 0;
enum bool isFloatingPoint = is(FloatingPointTypeOf!T);
}
unittest
@ -3239,12 +3227,12 @@ unittest
}
/**
Detect whether T is a built-in numeric type (integral or floating
Detect whether we can treat T as a built-in numeric type (integral or floating
point).
*/
template isNumeric(T)
{
enum bool isNumeric = isIntegral!(T) || isFloatingPoint!(T);
enum bool isNumeric = is(NumericTypeOf!T);
}
/**
@ -3252,8 +3240,7 @@ 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;
enum bool isUnsigned = is(UnsignedTypeOf!T);
}
/**
@ -3261,16 +3248,15 @@ 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;
enum bool isSigned = is(SignedTypeOf!T);
}
/**
Detect whether T is one of the built-in character types
Detect whether we can treat T as one of the built-in character types.
*/
template isSomeChar(T)
{
enum isSomeChar = staticIndexOf!(Unqual!T, char, wchar, dchar) >= 0;
enum isSomeChar = is(CharTypeOf!T);
}
unittest
@ -3289,9 +3275,8 @@ unittest
}
/**
Detect whether T is one of the built-in string types
Detect whether we can treat T as one of the built-in string types.
*/
template isSomeString(T)
{
enum isSomeString = isNarrowString!T || is(T : const(dchar[]));
@ -3405,7 +3390,7 @@ unittest
*/
template isAssociativeArray(T)
{
enum bool isAssociativeArray = __traits(isAssociativeArray, T);
enum bool isAssociativeArray = is(AssocArrayTypeOf!T);
}
unittest
@ -3425,6 +3410,11 @@ unittest
static assert(!isAssociativeArray!(int[]));
}
template isBuiltinType(T)
{
enum isBuiltinType = is(BuiltinTypeOf!T);
}
/**
* Detect whether type $(D T) is a pointer.
*/
@ -3895,18 +3885,22 @@ unittest
* Returns the corresponding unsigned type for T. T must be a numeric
* integral type, otherwise a compile-time error occurs.
*/
template Unsigned(T)
{
template Impl(T)
{
static if (isUnsigned!(T)) alias T Impl;
else static if (is(T == byte )) alias ubyte Impl;
else static if (is(T == short)) alias ushort Impl;
else static if (is(T == int )) alias uint Impl;
else static if (is(T == long )) alias ulong Impl;
else static assert(false, "Type " ~ T.stringof
~ " does not have an Unsigned counterpart");
static if (is(UnsignedTypeOf!T X))
alias X Impl;
else static if (is(SignedTypeOf!T X))
{
static if (is(X == byte )) alias ubyte Impl;
static if (is(X == short)) alias ushort Impl;
static if (is(X == int )) alias uint Impl;
static if (is(X == long )) alias ulong Impl;
}
else
static assert(false, "Type " ~ T.stringof ~
" does not have an Unsigned counterpart");
}
alias ModifyTypePreservingSTC!(Impl, OriginalType!T) Unsigned;
@ -3936,7 +3930,7 @@ template Largest(T...) if(T.length >= 1)
{
alias T[0] Largest;
}
static if (T.length == 2)
else static if (T.length == 2)
{
static if(T[0].sizeof >= T[1].sizeof)
{
@ -3969,13 +3963,18 @@ template Signed(T)
{
template Impl(T)
{
static if (isSigned!(T)) alias T Impl;
else static if (is(T == ubyte )) alias byte Impl;
else static if (is(T == ushort)) alias short Impl;
else static if (is(T == uint )) alias int Impl;
else static if (is(T == ulong )) alias long Impl;
else static assert(false, "Type " ~ T.stringof
~ " does not have an Signed counterpart");
static if (is(SignedTypeOf!T X))
alias X Impl;
else static if (is(UnsignedTypeOf!T X))
{
static if (is(X == ubyte )) alias byte Impl;
static if (is(X == ushort)) alias short Impl;
static if (is(X == uint )) alias int Impl;
static if (is(X == ulong )) alias long Impl;
}
else
static assert(false, "Type " ~ T.stringof ~
" does not have an Signed counterpart");
}
alias ModifyTypePreservingSTC!(Impl, OriginalType!T) Signed;