[Issue 570] New: Bogus recursive mixin error

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=570

           Summary: Bogus recursive mixin error
           Product: D
           Version: 0.174
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: rejects-valid
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: daekharel at gmail.com


import std.stdio;

template TupleDecls(T, R ...) {
    T value;
    static if (R.length)
        mixin TupleDecls!(R) Inner;
}

struct TupleStruct(T ...) { mixin TupleDecls!(T); }

void main() {
    alias TupleStruct!(char[], char[]) twoStrings;
}

---------
The above code generates the following errors when compiling:

err.d(6): mixin
err.TupleStruct!(char[],char[]).TupleStruct.TupleDecls!(char[],char[]).TupleDecls!(char[])
recursive mixin instantiation
err.d(12): template instance err.TupleStruct!(char[],char[]) error
instantiating

The compiler seems to think that TupleDecls!(char[]) is the same as
TupleDecls!(char[], char[]) somehow, and rejects instantiating the former
inside the latter as being recursive, even though it's not.


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