[Issue 12352] New: Consistently stop encoding return type of parent functions

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12352

           Summary: Consistently stop encoding return type of parent
                    functions
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: k.hara.pg at gmail.com


--- Comment #0 from Kenji Hara <k.hara.pg at gmail.com> 2014-03-12 07:39:44 PDT ---
Currently, for a function local symbol, the return types of its parent
functions are normally mangled into the name.

module test;
int foo()
{
    void bar() {
        struct S {}
        pragma(msg, S.mangleof);
        // S 4test 3fooFZi 3barMFZv 1S
        //               |        |
        //      int of foo        |
        //              void of bar
    }
    return 0;
}

But, for Voldemort types, we already has an exception of the rule.

module test;
auto foo()
{
    auto bar() {
        struct S {}
        pragma(msg, S.mangleof);
        //         S 4test 3fooFZ 3barMFZ 1S
        //                      |       |
        // no return type for foo       |
        //         no return type for bar
        return S();
    }
    return 0;
}

The change was introduced to fix Issue 8847. 

Essentially encoding the return types is redundant, because D does not allow
function overloading based on the return types.

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