Re: Simple template constraint question

[WhatMeWorry via Digitalmars-d-learn]

On Saturday, 19 September 2015 at 17:18:23 UTC, Daniel Kozak 
wrote:
WhatMeWorry píše v So 19. 09. 2015 v 17:09 +0000:
[...]

http://dlang.org/expression.html#IsExpression

3. is ( Type == TypeSpecialization )

import std.stdio;

struct S
{
}

class C
{
}

void f(T)(T someStruct) if (is (T == struct)) {
    writeln("struct");
}

void f(T)(T notStruct) if (!is(T == struct)) {
    writeln("not a struct");
}

void main() {
    auto c = new C();
    auto s = S();

   f(c); // not a struct
   f(s); // struct
}

Thanks!  I keep going straight to std.traits and forget about the 
is(Type)