mixin_string

import dmd.globals : Loc;
Expression e = new TypeidExp(Loc.initial, null);
Tuple t = new Tuple();
TemplateTypeParameter tp = new TemplateTypeParameter(Loc.initial, null, null, null);
assert(e.astTypeName == "TypeidExp");
assert(t.astTypeName == "Tuple");
assert(tp.astTypeName == "TemplateTypeParameter");