There is an example in http://www.digitalmars.com/d/2.0/mixin.html, like belown:

template GenStruct(char[] Name, char[] M1)
{
    const char[] GenStruct = "struct " ~ Name ~ "{ int " ~ M1 ~ "; }";
}

mixin(GenStruct!("Foo", "bar"));


It can be compiled when using in a demo. The char[] should be changed to string.

By the way, it seems that the mixin can only accept the type of const char[]. Should it take string type?