31 lines · c
1// RUN: %clang_cc1 %s -std=c2x -Wall -pedantic -fsyntax-only -verify=good2// RUN: %clang_cc1 %s -std=c2x -Wpre-c2x-compat -fsyntax-only -verify=c2x3// RUN: %clang_cc1 %s -std=c2x -Wpre-c2x-compat -Wno-gnu-empty-initializer -fsyntax-only -verify=c2x4// RUN: %clang_cc1 %s -std=c2x -Wgnu-empty-initializer -fsyntax-only -verify=good5// RUN: %clang_cc1 %s -std=c17 -Wall -pedantic -fsyntax-only -verify=c2x-ext6// RUN: %clang_cc1 %s -std=c17 -Wgnu-empty-initializer -fsyntax-only -verify=good7// RUN: %clang_cc1 %s -std=c17 -Wc2x-extensions -fsyntax-only -verify=c2x-ext8// RUN: %clang_cc1 %s -std=c17 -Wpre-c2x-compat -fsyntax-only -verify=good9 10// good-no-diagnostics11 12// Empty brace initialization used to be a GNU extension, but the feature was13// added to C2x. We now treat empty initialization as a C extension rather than14// a GNU extension. Thus, -Wgnu-empty-initializer is always silently ignored.15 16struct S {17 int a;18};19 20struct S s = {}; /* c2x-warning {{use of an empty initializer is incompatible with C standards before C23}}21 c2x-ext-warning {{use of an empty initializer is a C23 extension}}22 */23 24void func(void) {25 struct S s2 = {}; /* c2x-warning {{use of an empty initializer is incompatible with C standards before C23}}26 c2x-ext-warning {{use of an empty initializer is a C23 extension}}27 */28 (void)s2;29}30 31