http://d.puremagic.com/issues/show_bug.cgi?id=5175

           Summary: Add a way to get parameter names to std.traits
           Product: D
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: jmdavisProg@gmx.com


--- Comment #0 from Jonathan M Davis <jmdavisProg@gmx.com> 2010-11-05 15:14:08 PDT ---
You can use std.traits.ParameterTypeTuple!() to get the types of the parameters to a function, but there is not currently a way to get the names of the parameters. Apparently, this would be useful for creating bindings with other programming languages, so it should be added. It's discussed in this question on stackoverflow: http://is.gd/gLeNf

So, we should have something like std.traits.ParameterNameTuple!() which gives the names of a function's parameters.

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http://d.puremagic.com/issues/show_bug.cgi?id=5175


Andrej Mitrovic <andrej.mitrovich@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andrej.mitrovich@gmail.com


--- Comment #1 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2013-01-22 19:37:08 PST ---
Well there is now __parameters, but this gives out both the types, param names, and default values:

void test(int x, int y = 1) { }

template ParameterTuple(alias func)
{
    static if(is(typeof(func) P == __parameters))
        alias P ParameterTuple;
    else
        static assert(0);
}

void main()
{
    pragma(msg, ParameterTuple!test);
}

> (int x, int y = 1)

I would personally like to wrap ParameterTypeTuple, ParameterStorageClassTuple, and provide a single GetParameters template which would return a tuple of these struct objects:

struct Parameter(Type, alias DefVal)
{
    ParameterStorageClass stc;
    Type type;
    string name;
    alias DefVal defaultValue;
}

It's questionable how doable this is but it would make the API easier to use.

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