Hi!

Is it possible to read all attributes in case of overloading functions? Example:

struct Att { string name; }
struct Att2 { string name; }
@Att void testUDA(string x) { writeln("test(string ",x,")"); }
@Att2 void testUDA(int x) { writeln("test(string ",x,")"); }

void main(string[] args)
{
	testUDA("aaa");
	testUDA(100);

	foreach (attr; __traits(getAttributes, testUDA)) {
		if (attr.stringof == "Att") writeln("Found Att");
		if (attr.stringof == "Att2") writeln("Found Att2");
	}
}

results in one (!) "Found Att".
Seems like "First comes, first wins".

Regards, Ozan

On Thursday, 17 September 2015 at 11:47:40 UTC, Ozan wrote:
> Hi!
>
> Is it possible to read all attributes in case of overloading functions? Example:
>
> struct Att { string name; }
> struct Att2 { string name; }
> @Att void testUDA(string x) { writeln("test(string ",x,")"); }
> @Att2 void testUDA(int x) { writeln("test(string ",x,")"); }
>
> void main(string[] args)
> {
> 	testUDA("aaa");
> 	testUDA(100);
>
> 	foreach (attr; __traits(getAttributes, testUDA)) {
> 		if (attr.stringof == "Att") writeln("Found Att");
> 		if (attr.stringof == "Att2") writeln("Found Att2");
> 	}
> }
>
> results in one (!) "Found Att".
> Seems like "First comes, first wins".
>
> Regards, Ozan

use __traits(getAttributes, /*...*/) on each of the members of the result of __traits(getOverloads, /*...*/)

On Thursday, 17 September 2015 at 12:36:42 UTC, John Colvin wrote:
> On Thursday, 17 September 2015 at 11:47:40 UTC, Ozan wrote:
...
> use __traits(getAttributes, /*...*/) on each of the members of the result of __traits(getOverloads, /*...*/)

Great! Thanks! Now it works:

	foreach (ov; __traits(getOverloads, Test, "testUDA")) {
		foreach (attr; __traits(getAttributes, ov)) {
			if (attr.stringof == "Att") writeln("Found Att");
			if (attr.stringof == "Att2") writeln("Found Att2");
			if (attr.stringof == "Att3") writeln("Found Att3");
		}
	}

Regards, Ozan

On Thursday, 17 September 2015 at 12:40:24 UTC, Ozan wrote:
> On Thursday, 17 September 2015 at 12:36:42 UTC, John Colvin wrote:
>> On Thursday, 17 September 2015 at 11:47:40 UTC, Ozan wrote:
> ...
>> use __traits(getAttributes, /*...*/) on each of the members of the result of __traits(getOverloads, /*...*/)
>
> Great! Thanks! Now it works:
>
> 	foreach (ov; __traits(getOverloads, Test, "testUDA")) {
> 		foreach (attr; __traits(getAttributes, ov)) {
> 			if (attr.stringof == "Att") writeln("Found Att");
> 			if (attr.stringof == "Att2") writeln("Found Att2");
> 			if (attr.stringof == "Att3") writeln("Found Att3");
> 		}
> 	}
>
> Regards, Ozan

Awesome. By the way, in the next release there will be some more tools in phobos for this stuff, see http://dlang.org/phobos-prerelease/std_traits.html#getSymbolsByUDA for a taster.