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34 lines
741 B
D
34 lines
741 B
D
// https://issues.dlang.org/show_bug.cgi?id=23651
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template isCallable(alias callable)
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{
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static if (is(typeof(&callable!())))
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enum bool isCallable = isCallable!(typeof(&callable!()));
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else
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enum bool isCallable = true;
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}
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string foo();
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template FunctionTypeOf(alias func)
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if (isCallable!func)
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{
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alias FunctionTypeOf = typeof(foo);
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}
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template ReturnType(alias func)
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{
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static if (is(FunctionTypeOf!func R == return))
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alias ReturnType = R;
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}
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template isAttrRange()
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{
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alias NameType = ReturnType!((string r) => r);
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//pragma(msg, "isAttrRange ", NameType, " ", string);
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static assert(is(NameType == string));
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enum isAttrRange = is(NameType == string);
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}
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static assert(isAttrRange!());
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