debian-packages/taggedalgebraic
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Fix compilation errors caused by swap().

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This commit is contained in:
Sönke Ludwig 2018-03-20 16:21:36 +01:00
parent 100714d7b8
commit c7f4533d17
1 changed files with 16 additions and 4 deletions
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20
source/taggedalgebraic.d
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@ -88,14 +88,12 @@ struct TaggedAlgebraic(U) if (is(U == union) || is(U == struct))
this(TaggedAlgebraic other)
{
import std.algorithm : swap;
swap(this, other);
rawSwap(this, other);
}
void opAssign(TaggedAlgebraic other)
{
import std.algorithm : swap;
swap(this, other);
rawSwap(this, other);
}
// postblit constructor
@ -1298,3 +1296,17 @@ private void rawEmplace(T)(void[] dst, ref T src)
tdst[0] = src;
}
}
// std.algorithm.mutation.swap sometimes fails to compile due to
// internal errors in hasElaborateAssign!T/isAssignable!T. This is probably
// caused by cyclic dependencies. However, there is no reason to do these
// checks in this context, so we just directly move the raw memory.
private void rawSwap(T)(ref T a, ref T b)
@trusted {
void[T.sizeof] tmp = void;
void[] ab = (cast(void*)&a)[0 .. T.sizeof];
void[] bb = (cast(void*)&b)[0 .. T.sizeof];
tmp[] = ab[];
ab[] = bb[];
bb[] = tmp[];
}