clang/test/SemaCXX/gnu-flags.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wno-gnu
   2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s -DNONE -Wno-gnu
   3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s -DNONE -Wno-gnu
   4
   5 // RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wgnu
   6 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s -DALL -Wgnu
   7 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s -DALL -Wgnu
   8
   9 // RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wno-gnu \
  10 // RUN:   -Wgnu-anonymous-struct -Wredeclared-class-member \
  11 // RUN:   -Wgnu-flexible-array-union-member -Wgnu-folding-constant \
  12 // RUN:   -Wgnu-empty-struct
  13 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s -DALL -Wno-gnu \
  14 // RUN:   -Wgnu-anonymous-struct -Wredeclared-class-member \
  15 // RUN:   -Wgnu-flexible-array-union-member -Wgnu-folding-constant \
  16 // RUN:   -Wgnu-empty-struct
  17 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s -DALL -Wno-gnu \
  18 // RUN:   -Wgnu-anonymous-struct -Wredeclared-class-member \
  19 // RUN:   -Wgnu-flexible-array-union-member -Wgnu-folding-constant \
  20 // RUN:   -Wgnu-empty-struct
  21
  22 // RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wgnu \
  23 // RUN:   -Wno-gnu-anonymous-struct -Wno-redeclared-class-member \
  24 // RUN:   -Wno-gnu-flexible-array-union-member -Wno-gnu-folding-constant \
  25 // RUN:   -Wno-gnu-empty-struct
  26 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s -DNONE -Wgnu \
  27 // RUN:   -Wno-gnu-anonymous-struct -Wno-redeclared-class-member \
  28 // RUN:   -Wno-gnu-flexible-array-union-member -Wno-gnu-folding-constant \
  29 // RUN:   -Wno-gnu-empty-struct
  30 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s -DNONE -Wgnu \
  31 // RUN:   -Wno-gnu-anonymous-struct -Wno-redeclared-class-member \
  32 // RUN:   -Wno-gnu-flexible-array-union-member -Wno-gnu-folding-constant \
  33 // RUN:   -Wno-gnu-empty-struct
  34
  35 // Additional disabled tests:
  36 // %clang_cc1 -fsyntax-only -verify %s -DANONYMOUSSTRUCT -Wno-gnu -Wgnu-anonymous-struct
  37 // %clang_cc1 -fsyntax-only -verify %s -DREDECLAREDCLASSMEMBER -Wno-gnu -Wredeclared-class-member
  38 // %clang_cc1 -fsyntax-only -verify %s -DFLEXIBLEARRAYUNIONMEMBER -Wno-gnu -Wgnu-flexible-array-union-member
  39 // %clang_cc1 -fsyntax-only -verify %s -DFOLDINGCONSTANT -Wno-gnu -Wgnu-folding-constant
  40 // %clang_cc1 -fsyntax-only -verify %s -DEMPTYSTRUCT -Wno-gnu -Wgnu-empty-struct
  41
  42 #if NONE
  43 // expected-no-diagnostics
  44 #endif
  45
  46
  47 #if ALL || ANONYMOUSSTRUCT
  48 // expected-warning@+5 {{anonymous structs are a GNU extension}}
  49 #endif
  50
  51 struct as {
  52   int x;
  53   struct {
  54     int a;
  55     float b;
  56   };
  57 };
  58
  59
  60 #if ALL || REDECLAREDCLASSMEMBER
  61 // expected-note@+6 {{previous declaration is here}}
  62 // expected-warning@+6 {{class member cannot be redeclared}}
  63 #endif
  64
  65 namespace rcm {
  66   class A {
  67     class X;
  68     class X;
  69     class X {};
  70   };
  71 }
  72
  73
  74 #if ALL || FLEXIBLEARRAYUNIONMEMBER
  75 // expected-warning@+6 {{flexible array member 'c1' in a union is a GNU extension}}
  76 #endif
  77
  78 struct faum {
  79    int l;
  80    union {
  81        int c1[];
  82    };
  83 };
  84
  85
  86 #if (ALL || FOLDINGCONSTANT) && (__cplusplus <= 199711L) // C++03 or earlier modes
  87 // expected-warning@+4 {{in-class initializer for static data member is not a constant expression; folding it to a constant is a GNU extension}}
  88 #endif
  89
  90 struct fic {
  91   static const int B = int(0.75 * 1000 * 1000);
  92 };
  93
  94
  95 #if ALL || EMPTYSTRUCT
  96 // expected-warning@+3 {{flexible array member 'a' in otherwise empty struct is a GNU extension}}
  97 #endif
  98
  99 struct ofam {int a[];};
 100