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Use new __traits(isZeroInit) to check for a null initializer at compile time instead of runtime

This commit is contained in:
Nathan Sashihara 2018-10-19 02:20:13 -04:00
parent 3b5709821a
commit 4e8c9bd28f
2 changed files with 20 additions and 5 deletions
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7
source/tanya/algorithm/mutation.d
View File

@ -88,6 +88,12 @@ do
tanya.memory.op.copy((&source)[0 .. 1], (&target)[0 .. 1]);
static if (hasElaborateCopyConstructor!T || hasElaborateDestructor!T)
{
static if (__VERSION__ >= 2083) // __traits(isZeroInit) available.
{
deinitialize!(__traits(isZeroInit, T))(source);
}
else
{
if (typeid(T).initializer().ptr is null)
{
@ -99,6 +105,7 @@ do
}
}
}
}
else
{
target = source;

10
source/tanya/conv.d
View File

@ -185,9 +185,17 @@ out(result; memory.ptr is result)
}
else
{
static const T init = T.init;
static if (__VERSION__ >= 2083 // __traits(isZeroInit) available.
&& __traits(isZeroInit, T))
{
(() @trusted => memory.ptr[0 .. T.sizeof])().fill!0;
}
else
{
static immutable T init = T.init;
trustedCopy(init);
}
}
result.__ctor(args);
}
else static if (Args.length == 1 && is(typeof({ T t = args[0]; })))