Re: What about an identifier that is an mixin

[Daniel Kozák via Digitalmars-d]

Daniel Kozák <kozz...@gmail.com> napsal Pá, led 13, 2017 v 10∶32 :
Daniel Kozák <kozz...@gmail.com> napsal Pá, led 13, 2017 v 10∶29 :
André Puel via Digitalmars-d <digitalmars-d@puremagic.com> napsal 
Pá, led 13, 2017 v 10∶15 :
One thing that I miss sometimes when doing meta programming is 
being able to hide that a function should be called with mixin.

For example (pardon my lack of creativity):

    // Instead of
    string declare_a() {
        return "int a;"
    }

    int func() {
        mixin(declare_a);
        return a;
    }

    // Could we have?
    mixin declare_a() {
        return "int a;";
    }

    int func() {
        declare_a;
        return a;
    }

I think this could be useful when one is creating Idiom and 
Patterns, you could hide implementations details.

You can do this:

mixin template declare_a()
{
    int a;
}

int func()
{
    mixin declare_a;
    return a;
}

but there is no way to exclude mixin before calling declare_a, there 
is a good reason for that (it is really important to be able to tell 
when you use mixin and when not)

Right now you can even use
template declare_a() {...}

there is no difference between template and mixin template

in this context, AFAIK you can not use mixin template like a normal 
template but you can use non mixin template like a mixin template