Empty ParameterIdentifierTuple for function literal

[dlangBugzillaToGithub]

Meta reported this on 2014-11-26T21:09:58Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=13780

CC List

• Vladimir Panteleev (@CyberShadow)
• Luís Marques
• Daniel

Description

import std.stdio;
import std.traits;

void main()
{
    //Prints a blank line
    writeln(ParameterIdentifierTuple!((int n) => n));
}

[dlangBugzillaToGithub]

wyrlon commented on 2015-08-29T10:20:18Z

I was just hit by this bug as well.

It's possible to workaround with string parsing, but not pretty.

static if(is(FunctionTypeOf!T P == __parameters))
{
  enum decl = P.stringof[1..$-1]; // hack, strip parenthesis
  // parse decl
}

For a proper fix, __traits(identifier, ...) needs to work for function literals.

[dlangBugzillaToGithub]

luis commented on 2015-09-01T09:15:04Z

Pull request:
https://github.com/D-Programming-Language/phobos/pull/3620