================ @@ -1,13 +1,158 @@ -// RUN: %clang_cc1 %s -verify=c -fsyntax-only -// RUN: %clang_cc1 %s -verify -fsyntax-only -x c++ -// RUN: %clang_cc1 %s -verify -fsyntax-only -fms-compatibility -// RUN: %clang_cc1 %s -verify -fsyntax-only -fms-compatibility -x c++ +// RUN: %clang_cc1 %s -verify=stock,c -fsyntax-only +// RUN: %clang_cc1 %s -verify=stock,cpp -fsyntax-only -x c++ +// RUN: %clang_cc1 %s -verify=stock,cpp -fsyntax-only -fms-compatibility -x c++ +// RUN: %clang_cc1 %s -verify=stock,c,gnu -fsyntax-only -Wgnu-flexible-array-union-member -Wgnu-empty-struct +// RUN: %clang_cc1 %s -verify=stock,c,microsoft -fsyntax-only -fms-compatibility -Wmicrosoft // The test checks that an attempt to initialize union with flexible array // member with an initializer list doesn't crash clang. -union { char x[]; } r = {0}; // c-error {{flexible array member 'x' in a union is not allowed}} +union { char x[]; } r = {0}; /* gnu-warning {{flexible array member 'x' in a union is a GNU extension}} + microsoft-warning {{flexible array member 'x' in a union is a Microsoft extension}} + */ +struct _name1 { + int a; + union { + int b; + char x[]; /* gnu-warning {{flexible array member 'x' in a union is a GNU extension}} + microsoft-warning {{flexible array member 'x' in a union is a Microsoft extension}} + */ + }; +} name1 = { + 10, + 42, /* initializes "b" */ +}; -// expected-no-diagnostics +struct _name1i { + int a; + union { + int b; + char x[]; /* gnu-warning {{flexible array member 'x' in a union is a GNU extension}} + microsoft-warning {{flexible array member 'x' in a union is a Microsoft extension}} + */ + }; +} name1i = { + .a = 10, + .b = 42, +}; + +/* Initialization of flexible array in a union is never allowed. */ +struct _name2 { + int a; + union { + int b; + char x[]; /* gnu-warning {{flexible array member 'x' in a union is a GNU extension}} + microsoft-warning {{flexible array member 'x' in a union is a Microsoft extension}} + stock-note {{initialized flexible array member 'x' is here}} + */ + }; +} name2 = { + 12, + 13, + { 'c' }, /* stock-error {{initialization of flexible array member is not allowed}} */ ---------------- kees wrote:
Prior to this PR, it wasn't possible to use a flex array in a union, so I'll include it here and recheck the entire test suite. Thanks for finding this! I had found the function, but hadn't yet figured out how the position was being walked. :) https://github.com/llvm/llvm-project/pull/84428 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits