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Alias traits from druntime (#7148)

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Alias traits from druntime

Signed-off-by: Nicholas Wilson <thewilsonator@users.noreply.github.com>
Signed-off-by: Eduard Staniloiu <edi33416@users.noreply.github.com>
Signed-off-by: Razvan Nitu <RazvanN7@users.noreply.github.com>
Merged-on-behalf-of: Razvan Nitu <RazvanN7@users.noreply.github.com>
This commit is contained in:
Manu Evans 2021-09-15 00:38:59 -07:00 • committed by GitHub
parent ee836dd748
commit b86bb94ab9
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1 changed files with 11 additions and 64 deletions
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75
std/traits.d
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@ -2675,12 +2675,8 @@ template hasNested(T)
*/
template Fields(T)
{
static if (is(T == struct) || is(T == union))
alias Fields = typeof(T.tupleof[0 .. $ - isNested!T]);
else static if (is(T == class) || is(T == interface))
alias Fields = typeof(T.tupleof);
else
alias Fields = AliasSeq!T;
import core.internal.traits : _Fields = Fields;
alias Fields = _Fields!T;
}
///
@ -2718,7 +2714,7 @@ alias FieldTypeTuple = Fields;
static assert(is(FieldTypeTuple!NestedClass == AliasSeq!int));
static interface I {}
static assert(is(Fields!I == AliasSeq!()));
static assert(is(Fields!I == AliasSeq!(I)));
}
//Required for FieldNameTuple
@ -3324,15 +3320,8 @@ $(LI a [context pointer][isNested].))
*/
template hasIndirections(T)
{
static if (is(T == struct) || is(T == union))
enum hasIndirections = anySatisfy!(.hasIndirections, typeof(T.tupleof));
else static if (isStaticArray!T && is(T : E[N], E, size_t N))
enum hasIndirections = is(E == void) ? true : hasIndirections!E;
else static if (isFunctionPointer!T)
enum hasIndirections = false;
else
enum hasIndirections = isPointer!T || isDelegate!T || isDynamicArray!T ||
isAssociativeArray!T || is (T == class) || is(T == interface);
import core.internal.traits : _hasIndirections = hasIndirections;
alias hasIndirections = _hasIndirections!T;
}
///
@ -6025,17 +6014,8 @@ template StaticArrayTypeOf(T)
*/
template DynamicArrayTypeOf(T)
{
static if (is(AliasThisTypeOf!T AT) && !is(AT[] == AT))
alias X = DynamicArrayTypeOf!AT;
else
alias X = OriginalType!T;
static if (is(X == E[], E))
{
alias DynamicArrayTypeOf = X;
}
else
static assert(0, T.stringof~" is not a dynamic array");
import core.internal.traits : _DynamicArrayTypeOf = DynamicArrayTypeOf;
alias DynamicArrayTypeOf = _DynamicArrayTypeOf!T;
}
@safe unittest
@ -7880,29 +7860,8 @@ else
// [For internal use]
package template ModifyTypePreservingTQ(alias Modifier, T)
{
static if (is(T U == immutable U)) alias ModifyTypePreservingTQ = immutable Modifier!U;
else static if (is(T U == shared inout const U)) alias ModifyTypePreservingTQ = shared inout const Modifier!U;
else static if (is(T U == shared inout U)) alias ModifyTypePreservingTQ = shared inout Modifier!U;
else static if (is(T U == shared const U)) alias ModifyTypePreservingTQ = shared const Modifier!U;
else static if (is(T U == shared U)) alias ModifyTypePreservingTQ = shared Modifier!U;
else static if (is(T U == inout const U)) alias ModifyTypePreservingTQ = inout const Modifier!U;
else static if (is(T U == inout U)) alias ModifyTypePreservingTQ = inout Modifier!U;
else static if (is(T U == const U)) alias ModifyTypePreservingTQ = const Modifier!U;
else alias ModifyTypePreservingTQ = Modifier!T;
}
@safe unittest
{
alias Intify(T) = int;
static assert(is(ModifyTypePreservingTQ!(Intify, real) == int));
static assert(is(ModifyTypePreservingTQ!(Intify, const real) == const int));
static assert(is(ModifyTypePreservingTQ!(Intify, inout real) == inout int));
static assert(is(ModifyTypePreservingTQ!(Intify, inout const real) == inout const int));
static assert(is(ModifyTypePreservingTQ!(Intify, shared real) == shared int));
static assert(is(ModifyTypePreservingTQ!(Intify, shared const real) == shared const int));
static assert(is(ModifyTypePreservingTQ!(Intify, shared inout real) == shared inout int));
static assert(is(ModifyTypePreservingTQ!(Intify, shared inout const real) == shared inout const int));
static assert(is(ModifyTypePreservingTQ!(Intify, immutable real) == immutable int));
import core.internal.traits : _ModifyTypePreservingTQ = ModifyTypePreservingTQ;
alias ModifyTypePreservingTQ = _ModifyTypePreservingTQ!(Modifier, T);
}
/**
@ -8049,20 +8008,8 @@ template ForeachType(T)
*/
template OriginalType(T)
{
static if (is(T == enum))
{
template Impl(T)
{
static if (is(T U == enum)) alias Impl = OriginalType!U;
else alias Impl = T;
}
alias OriginalType = ModifyTypePreservingTQ!(Impl, T);
}
else
{
alias OriginalType = T;
}
import core.internal.traits : _OriginalType = OriginalType;
alias OriginalType = _OriginalType!T;
}
///