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Merge pull request #4164 from Ukalnins/issue_15874

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Fix Issue 15874 - getSymbolsByUDA fails if struct has no UDAs
This commit is contained in:
Brian Schott 2016-04-06 16:21:43 -07:00
commit cf4f09f12e
1 changed files with 10 additions and 2 deletions
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12
std/traits.d
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@ -6723,8 +6723,8 @@ template getSymbolsByUDA(alias symbol, alias attribute) {
// translate a list of strings into symbols. mixing in the entire alias
// avoids trying to access the symbol, which could cause a privacy violation
template toSymbols(names...) {
static if (names.length == 1)
mixin("alias toSymbols = AliasSeq!(symbol.%s);".format(names[0]));
static if (names.length == 0)
alias toSymbols = AliasSeq!();
else
mixin("alias toSymbols = AliasSeq!(symbol.%s, toSymbols!(names[1..$]));"
.format(names[0]));
@ -6796,6 +6796,14 @@ unittest
static assert(getSymbolsByUDA!(C, UDA).length == 2);
static assert(getSymbolsByUDA!(C, UDA)[0].stringof == "C");
static assert(getSymbolsByUDA!(C, UDA)[1].stringof == "d");
static struct D
{
int x;
}
//Finds nothing if there is no member with specific UDA
static assert(getSymbolsByUDA!(D,UDA).length == 0);
}
// #15335: getSymbolsByUDA fails if type has private members