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digitalmars.D.bugs - [Issue 4732] New: __traits(identifier) performs constant folding on symbols

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4732

           Summary: __traits(identifier) performs constant folding on
                    symbols
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: patch, rejects-valid
          Severity: minor
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: rsinfu gmail.com



---
Created an attachment (id=741)
Patch against dmd r621

__traits(identifier) tries to fold its argument to a constant. And symbols of
manifest constants cannot be obtained via the traits:
-------------------- test.d
enum symbol = 42;
pragma(msg, __traits(identifier, symbol), " = ", symbol);
--------------------
% dmd -c -o- test
test.d(2): Error: argument 42 has no identifier
false = 42
--------------------

For the 'identifier' traits, folding an argument to a constant does not make
sense. The proposed patch fixes the problem by disabling constfold on arguments
as done in the 'isSame' traits.

With the patch, the result gets corrected:

% dmd-patched -c -o- test
symbol = 42

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parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4732


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |clugdbug yahoo.com.au
         Resolution|                            |FIXED



Fixed
https://github.com/D-Programming-Language/dmd/commit/8469bc2f932f7ac93532da8ee454e86e5da3c0e8

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