forked from OSchip/llvm-project
f547fc89c0
[buildbot issues fixed] This check performs basic analysis of macros and replaces them with an anonymous unscoped enum. Using an unscoped anonymous enum ensures that everywhere the macro token was used previously, the enumerator name may be safely used. Potential macros for replacement must meet the following constraints: - Macros must expand only to integral literal tokens. The unary operators plus, minus and tilde are recognized to allow for positive, negative and bitwise negated integers. - Macros must be defined on sequential source file lines, or with only comment lines in between macro definitions. - Macros must all be defined in the same source file. - Macros must not be defined within a conditional compilation block. - Macros must not be defined adjacent to other preprocessor directives. - Macros must not be used in preprocessor conditions Each cluster of macros meeting the above constraints is presumed to be a set of values suitable for replacement by an anonymous enum. From there, a developer can give the anonymous enum a name and continue refactoring to a scoped enum if desired. Comments on the same line as a macro definition or between subsequent macro definitions are preserved in the output. No formatting is assumed in the provided replacements. The check cppcoreguidelines-macro-to-enum is an alias for this check. Fixes #27408 Differential Revision: https://reviews.llvm.org/D117522 |
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