| // RUN: %clang_cc1 %s -std=c2x -Wall -pedantic -fsyntax-only -verify=good |
| // RUN: %clang_cc1 %s -std=c2x -Wpre-c2x-compat -fsyntax-only -verify=c2x |
| // RUN: %clang_cc1 %s -std=c2x -Wpre-c2x-compat -Wno-gnu-empty-initializer -fsyntax-only -verify=c2x |
| // RUN: %clang_cc1 %s -std=c2x -Wgnu-empty-initializer -fsyntax-only -verify=good |
| // RUN: %clang_cc1 %s -std=c17 -Wall -pedantic -fsyntax-only -verify=c2x-ext |
| // RUN: %clang_cc1 %s -std=c17 -Wgnu-empty-initializer -fsyntax-only -verify=good |
| // RUN: %clang_cc1 %s -std=c17 -Wc2x-extensions -fsyntax-only -verify=c2x-ext |
| // RUN: %clang_cc1 %s -std=c17 -Wpre-c2x-compat -fsyntax-only -verify=good |
| |
| // good-no-diagnostics |
| |
| // Empty brace initialization used to be a GNU extension, but the feature was |
| // added to C2x. We now treat empty initialization as a C extension rather than |
| // a GNU extension. Thus, -Wgnu-empty-initializer is always silently ignored. |
| |
| struct S { |
| int a; |
| }; |
| |
| struct S s = {}; /* c2x-warning {{use of an empty initializer is incompatible with C standards before C23}} |
| c2x-ext-warning {{use of an empty initializer is a C23 extension}} |
| */ |
| |
| void func(void) { |
| struct S s2 = {}; /* c2x-warning {{use of an empty initializer is incompatible with C standards before C23}} |
| c2x-ext-warning {{use of an empty initializer is a C23 extension}} |
| */ |
| (void)s2; |
| } |
| |