• Timothee Cour via Digitalmars-d-learn (12/12) Mar 14 2015 Why can't we allow mixin templates to contain statements, as is the case
• Meta (3/17) Mar 14 2015 Wouldn't the most basic explanation be that templates cannot
• ketmar (13/29) Mar 15 2015 template Foo(int a, string b) {
• ketmar (2/14) Mar 15 2015 ah, that `+`... ;-)=

Timothee Cour via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:

Why can't we allow mixin templates to contain statements, as is the case
for regular mixins?
Is there a workaround?

here's a dummy example:

template mixin Foo{
 //some statement, eg: 'return;'
}

void fun(){
  mixin Foo;
}

Note that I can do this with a regular mixin, but template mixins are
cleaner (esp in more complex examples).

"Meta" <jared771 gmail.com> writes:

On Sunday, 15 March 2015 at 01:20:55 UTC, Timothee Cour wrote:
 Why can't we allow mixin templates to contain statements, as is 
 the case
 for regular mixins?
 Is there a workaround?

 here's a dummy example:

 template mixin Foo{
  //some statement, eg: 'return;'
 }

 void fun(){
   mixin Foo;
 }

 Note that I can do this with a regular mixin, but template 
 mixins are
 cleaner (esp in more complex examples).

Wouldn't the most basic explanation be that templates cannot 
contain statements, therefore mixin templates can't either?

ketmar <ketmar ketmar.no-ip.org> writes:

On Sat, 14 Mar 2015 18:20:47 -0700, Timothee Cour via Digitalmars-d-learn
wrote:

 Why can't we allow mixin templates to contain statements, as is the case
 for regular mixins?
 Is there a workaround?
=20
 here's a dummy example:
=20
 template mixin Foo{
  //some statement, eg: 'return;'
 }
=20
 void fun(){
   mixin Foo;
 }
=20
 Note that I can do this with a regular mixin, but template mixins are
 cleaner (esp in more complex examples).

template Foo(int a, string b) {
  import std.format : format;
  enum Foo =3D q{
    {
      import std.conv : to;
      return %2$s+to!string(%1$s);
    }
  }.format(a, b.stringof);
}

positional args, syntax highlighting, usage like `mixin(Foo!(42, "z"));`.
maybe this will help.=

ketmar <ketmar ketmar.no-ip.org> writes:

On Sun, 15 Mar 2015 13:28:33 +0000, ketmar wrote:

 template Foo(int a, string b) {
   import std.format : format;
   enum Foo =3D q{
     {
       import std.conv : to; return %2$s+to!string(%1$s);
     }
   }.format(a, b.stringof);
 }
=20
 positional args, syntax highlighting, usage like `mixin(Foo!(42,
 "z"));`.
 maybe this will help.

ah, that `+`... ;-)=