import std.typetuple;

static assert( is( TypeTuple!( int, "a" ) == TypeTuple!( int, "a" ) );

The above code asserts. Is there some other way to compare mixed tuples, or should i roll my own comparison function?


-- 
Simen

Simen kjaeraas Wrote:
> static assert( is( TypeTuple!( int, "a" ) == TypeTuple!( int, "a" ) );

Look for this problem in the digitalmars.D.learn group, because I have seen this problem recently solved here (I don't remember the solution, it was easy).

Bye,
bearophile

bearophile <bearophileHUGS@lycos.com> wrote:

> Simen kjaeraas Wrote:
>> static assert( is( TypeTuple!( int, "a" ) == TypeTuple!( int, "a" ) );
>
> Look for this problem in the digitalmars.D.learn group, because I have seen this problem recently solved here (I don't remember the solution, it was easy).

Yeah. is( T == U ) only works for type tuples, though. Had to write my
own comparison code. I'd recommend something like this be added to Phobos.

template SameTuple( T... ) {
    template As( U... ) {
        static if ( T.length != U.length ) {
            enum As = false;
        } else static if ( T.length == 0 ) {
            enum As = true;
        } else static if ( T.length == 1 ) {
            enum As = is( T[0] == U[0] ) || T[0] == U[0];
        } else {
            enum As = SameTuple!( T[1..$] ).As!( U[1..$] ) && is( T[0] == U[0] ) || T[0] == U[0];
        }
    }
}

Usage:

if ( SameTuple!( int, "a" ).As( int, "a" ) ) {}

-- 
Simen

Simen kjaeraas <simen.kjaras@gmail.com> wrote:

> if ( SameTuple!( int, "a" ).As( int, "a" ) ) {}

Now if only someone would fix
http://d.puremagic.com/issues/show_bug.cgi?id=242

-- 
Simen

Simen kjaeraas:

>I'd recommend something like this be added to Phobos.<

Looks nice. There are many small bits of functionality like that that are missing still in Phobos and can be added. I suggest you to put that code in a bugzilla entry (otherwise I can do it myself) with a good unittest{} and if you want a ddoc comment too.

Bye,
bearophile

bearophile <bearophileHUGS@lycos.com> wrote:

> Looks nice. There are many small bits of functionality like that that are missing still in Phobos and can be added. I suggest you to put that code in a bugzilla entry (otherwise I can do it myself) with a good unittest{} and if you want a ddoc comment too.

Done: http://d.puremagic.com/issues/show_bug.cgi?id=4239

-- 
Simen