One question about templates

[bearophile]

How can I tell that S1 and S2 are different instantiations of the same struct template, while Bar is an instantiation of a different struct template?


struct Foo(T...) {}
struct Bar(T...) {}

template SameStructTemplate(S1, S2) {
    // enum bool SameStructTemplate = ?
}

void main() {
    alias Foo!(int,int,int) S1;
    alias Foo!(float,int,int,int) S2;
    alias Bar!(float,int,int,int) S3;

    static assert(SameStructTemplate!(S1, S2));
    static assert(!SameStructTemplate!(S1, S3));
}


Bye and thank you,
bearophile