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Merge pull request #4864 from MartinNowak/fix16582

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fix Issue 16582 - ParameterDefaults fails w/ scope parameter
This commit is contained in:
Walter Bright 2016-10-17 11:51:02 -07:00 • committed by GitHub
commit e333b7ad4e
1 changed files with 16 additions and 3 deletions
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19
std/traits.d
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@ -1207,10 +1207,21 @@ template ParameterDefaults(func...)
template Get(size_t i) template Get(size_t i)
{ {
enum ParamName = ParameterIdentifierTuple!(func[0])[i]; enum ParamName = ParameterIdentifierTuple!(func[0])[i];
// workaround scope escape check, see
// https://issues.dlang.org/show_bug.cgi?id=16582
// should use return scope once available
static if (ParamName.length) static if (ParamName.length)
enum get = (PT[i..i+1]) => mixin(ParamName); enum get = (PT[i..i+1]) @trusted
{
PT[i]* __pd_val = &mixin(ParamName); // workaround Bugzilla 16582
return *__pd_val;
};
else // Unnamed parameter else // Unnamed parameter
enum get = (PT[i..i+1] __args) => __args[0]; enum get = (PT[i..i+1] __args) @trusted
{
PT[i]* val = &__args[0]; // workaround Bugzilla 16582
return *val;
};
static if (is(typeof(get()))) static if (is(typeof(get())))
enum Get = get(); enum Get = get();
else else
@ -1288,9 +1299,11 @@ alias ParameterDefaultValueTuple = ParameterDefaults;
static immutable Colour white = Colour(255,255,255,255); static immutable Colour white = Colour(255,255,255,255);
} }
void bug8106(Colour c = Colour.white){} void bug8106(Colour c = Colour.white) {}
//pragma(msg, PDVT!bug8106); //pragma(msg, PDVT!bug8106);
static assert(PDVT!bug8106[0] == Colour.white); static assert(PDVT!bug8106[0] == Colour.white);
void bug16582(scope int* val = null) {}
static assert(PDVT!bug16582[0] is null);
} }