Bug 24639 – ImportC: defines of negative constants not detected for enum conversion

file2.c: #define blah -1 #define blah2 (-1) #define blah3 (0 - 1) file1.d: import file2; unittest { assert(blah == -1); // can't find blah assert(blah2 == -1); // can't find blah2 assert(blah3 == -1); // OK! } I think the issue is that the parser does not see the `-` sign as a number, and so skips this definition. But it does work for an expression that starts with a number inside parentheses.

@tim-dlang created dlang/dmd pull request #16789 "Fix bugzilla 24639 - ImportC: defines of negative constants not detec…" fixing this issue: - Fix bugzilla 24639 - ImportC: defines of negative constants not detected for enum conversion Negative expressions inside parens are already supported. This adds support for defines with negative numbers without parens, but not more complex expressions. Defines for negative numbers are often used as error codes in C. https://github.com/dlang/dmd/pull/16789

dlang/dmd pull request #16789 "Fix bugzilla 24639 - ImportC: defines of negative constants not detec…" was merged into master: - cf3bdf684c0fd2fede464af7e64496b6bad48709 by Tim Schendekehl: Fix bugzilla 24639 - ImportC: defines of negative constants not detected for enum conversion Negative expressions inside parens are already supported. This adds support for defines with negative numbers without parens, but not more complex expressions. Defines for negative numbers are often used as error codes in C. https://github.com/dlang/dmd/pull/16789