Template bug

test.d

import std;

void aFoo() {
}
void aBar() {
}

alias vsh1(string name) = (){};
template vsh1(alias foo) {
	auto vsh1(Parameters!foo args) {
        return;
	}
}
alias vsh2(string name) = (){};
template vsh2(alias foo, alias bar) {
	auto vsh2(Parameters!foo args) {
        return;
	}
}


void main() {
    vsh1!"a"();
    vsh2!"a"();
}

template vsh2(T...) {
        static if(T.length == 1 && is(typeof(T[0]) == string))
                void vsh2() {}
        else static if(T.length == 2) {
                alias foo = T[0];
                alias bar = T[1];
                auto vsh2(Parameters!foo args) {
                        return;
                }
        } else static assert(0);
}

template vshCreate(T...)
if ((T.length==1 && is(typeof(T[0])==string)) || (T.length==2 && isCallable!(T[0]) && isCallable!(T[1]))
{
	static if (T.length==1) {
	}
	static if (T.length==2) {
	}
	static assert(false);
}