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llvm-project/clang/test/Preprocessor/suggest-typoed-directive.c

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Suggest typo corrections for preprocessor directives When a preprocessor directive is unknown outside of a skipped conditional block, we give an error diagnostic because we don't know how to proceed with preprocessing. But when the directive is in a skipped conditional block, we would not diagnose it on the theory that the directive may be known to an implementation other than Clang. Now, for unknown directives inside a skipped conditional block, we diagnose the unknown directive as a warning if it is sufficiently similar to a directive specific to preprocessor conditional blocks. For example, we'll warn about `#esle` and suggest `#else` but we won't warn about `#progma` because it's not a directive specific to preprocessor conditional blocks. Fixes #51598 Differential Revision: https://reviews.llvm.org/D124726
2022-05-13 21:09:32 +08:00
// RUN: %clang_cc1 -fsyntax-only -verify=pre-c2x-cpp2b %s
// RUN: %clang_cc1 -std=c2x -fsyntax-only -verify=c2x-cpp2b %s
// RUN: %clang_cc1 -x c++ -std=c++2b -fsyntax-only -verify=c2x-cpp2b %s
// id: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#if'?}}
// ifd: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#if'?}}
// ifde: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#ifdef'?}}
// elf: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#elif'?}}
// elsif: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#elif'?}}
// elseif: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#elif'?}}
// elfidef: not suggested to '#elifdef'
// elfindef: not suggested to '#elifdef'
// elfinndef: not suggested to '#elifndef'
// els: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#else'?}}
// endi: pre-c2x-cpp2b-warning@+12 {{invalid preprocessing directive, did you mean '#endif'?}}
#ifdef UNDEFINED
#id
#ifd
#ifde
#elf
#elsif
#elseif
#elfidef
#elfindef
#elfinndef
#els
#endi
#endif
// id: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#if'?}}
// ifd: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#if'?}}
// ifde: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#ifdef'?}}
// elf: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#elif'?}}
// elsif: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#elif'?}}
// elseif: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#elif'?}}
// elfidef: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#elifdef'?}}
// elfindef: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#elifdef'?}}
// elfinndef: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#elifndef'?}}
// els: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#else'?}}
// endi: c2x-cpp2b-warning@-12 {{invalid preprocessing directive, did you mean '#endif'?}}
#ifdef UNDEFINED
#i // no diagnostic
#endif
#if special_compiler
#special_compiler_directive // no diagnostic
#endif