ClangCheck — Clang 22.0.0git documentation (original) (raw)

ClangCheck is a small wrapper around LibTooling which can be used to do basic error checking and AST dumping.

$ cat < snippet.cc

void f() { int a = 0 } EOF $ ~/clang/build/bin/clang-check snippet.cc -ast-dump -- Processing: /Users/danieljasper/clang/llvm/tools/clang/docs/snippet.cc. /Users/danieljasper/clang/llvm/tools/clang/docs/snippet.cc:2:12: error: expected ';' at end of declaration int a = 0 ^ ; (TranslationUnitDecl 0x7ff3a3029ed0 <> (TypedefDecl 0x7ff3a302a410 <> __int128_t '__int128') (TypedefDecl 0x7ff3a302a470 <> __uint128_t 'unsigned __int128') (TypedefDecl 0x7ff3a302a830 <> __builtin_va_list '__va_list_tag [1]') (FunctionDecl 0x7ff3a302a8d0 </Users/danieljasper/clang/llvm/tools/clang/docs/snippet.cc:1:1, line:3:1> f 'void (void)' (CompoundStmt 0x7ff3a302aa10 <line:1:10, line:3:1> (DeclStmt 0x7ff3a302a9f8 <line:2:3, line:3:1> (VarDecl 0x7ff3a302a980 <line:2:3, col:11> a 'int' (IntegerLiteral 0x7ff3a302a9d8 col:11 'int' 0)))))) 1 error generated. Error while processing snippet.cc.

The ‘–’ at the end is important as it prevents clang-check from searching for a compilation database. For more information on how to setup and use clang-check in a project, see How To Setup Clang Tooling For LLVM.