maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/test/Parser/empty-translation-unit.c

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

12 lines
504 B
C
Raw Normal View History

Add pedantic warning -Wempty-translation-unit (C11 6.9p1). In standard C since C89, a 'translation-unit' is syntactically defined to have at least one "external-declaration", which is either a decl or a function definition. In Clang the latter gives us a declaration as well. The tricky bit about this warning is that our predefines can contain external declarations (__builtin_va_list and the 128-bit integer types). Therefore our AST parser now makes sure we have at least one declaration that doesn't come from the predefines buffer. Also, remove bogus warning about empty source files. This doesn't catch source files that only contain comments, and never fired anyway because of our predefines. PR12665 and <rdar://problem/9165548> llvm-svn: 158085
2012-06-07 01:25:21 +08:00
// RUN: %clang_cc1 -fsyntax-only -std=c99 -pedantic -W -verify %s
[Parser] Suppress -Wempty-translation-unit if this is a header file This is motivated by tooling (clangd, libclang etc) - headers without declarations are legitimate even if they're not valid TUs. The other use -x c-header cases (PCH/modules) are nonstandard anyway and this warning doesn't seem necessary there either. Differential Revision: https://reviews.llvm.org/D85789
2020-08-12 06:06:52 +08:00
// RUN: %clang_cc1 -fsyntax-only -x c-header -std=c99 -pedantic-errors -W %s
Add pedantic warning -Wempty-translation-unit (C11 6.9p1). In standard C since C89, a 'translation-unit' is syntactically defined to have at least one "external-declaration", which is either a decl or a function definition. In Clang the latter gives us a declaration as well. The tricky bit about this warning is that our predefines can contain external declarations (__builtin_va_list and the 128-bit integer types). Therefore our AST parser now makes sure we have at least one declaration that doesn't come from the predefines buffer. Also, remove bogus warning about empty source files. This doesn't catch source files that only contain comments, and never fired anyway because of our predefines. PR12665 and <rdar://problem/9165548> llvm-svn: 158085
2012-06-07 01:25:21 +08:00
// RUN: %clang_cc1 -fsyntax-only -x c++ -std=c++03 -pedantic-errors -W %s
#include "completely-empty-header-file.h"
// no-warning -- an empty file is OK
#define A_MACRO_IS_NOT_GOOD_ENOUGH 1
[Parser] Suppress -Wempty-translation-unit if this is a header file This is motivated by tooling (clangd, libclang etc) - headers without declarations are legitimate even if they're not valid TUs. The other use -x c-header cases (PCH/modules) are nonstandard anyway and this warning doesn't seem necessary there either. Differential Revision: https://reviews.llvm.org/D85789
2020-08-12 06:06:52 +08:00
// In C we should get this warning, but in C++ (or a header) we shouldn't.
Our style for diagnostic messages is to not include a trailing dot. llvm-svn: 167379
2012-11-05 13:32:00 +08:00
// expected-warning{{ISO C requires a translation unit to contain at least one declaration}}