Summary: Member expression tuple allowed for types, disallowed
                    for expressions
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: patch
          Severity: normal
          Priority: P2
         Component: DMD

--- Comment #0 from Shin Fujishiro <> 2010-09-23 03:18:28 PDT 
Created an attachment (id=765)
Patch against dmd r680

Alias to a non-type tuple can't be used as a member of struct or class. The
following code doesn't compile.
struct Test(parameters_...)
    alias parameters_ parameters;
Test!(10, 20, 30) test;
static assert(typeof(test).parameters[1] == 20); // okay
static assert(       test .parameters[1] == 20); // (7)
% dmd -o- -c test.d
test.d(7): Error: 10 is not a member
test.d(7): Error: static assert  ((__error) == (__error)) is false

DotVarExp::semantic() only allows tuple of member variables as a member. The
proposed patch changes it so that other kinds of tuples are allowed. Passed
dmd/druntime/phobos tests.

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