[Issue 1182] New: Mixins scope

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1182

           Summary: Mixins scope
           Product: D
           Version: 1.013
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: aarti at interia.pl


Spec: Mixin Scope
The declarations in a mixin are 'imported' into the surrounding scope. If the
name of a declaration in a mixin is the same as a declaration in the
surrounding scope, the surrounding declaration overrides the mixin one. 

---
Mixins should not only compare name with existing symbols in current scope, but
in case of functions also parameters. It will allow proper function
overloading. Currently following test case fails to compile:

import std.stdio;
template TestTemplate(T) {
    T policy(int i) { return T.init;}
    int policy() { return 1; }
}
class TestClass {
    mixin TestTemplate!(TestClass);
    TestClass policy(int i) { return this; }
}
void main() {
    writefln((new TestClass).policy);
}
---

It is quite painful limitation of mixins, and IMHO should be bug. I put it as
enhancement because it conforms literal interpretation of specs.


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