clang/test/Preprocessor/pragma_diagnostic_sections.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -Wall -Wunused-macros -Wunused-parameter -Wno-uninitialized -verify %s
   2
   3 struct S {
   4     void m1() { int b; while (b==b); } // expected-warning {{always evaluates to true}}
   5
   6 #pragma clang diagnostic push
   7 #pragma clang diagnostic ignored "-Wtautological-compare"
   8     void m2() { int b; while (b==b); }
   9 #pragma clang diagnostic pop
  10
  11     void m3() { int b; while (b==b); } // expected-warning {{always evaluates to true}}
  12 };
  13
  14 //------------------------------------------------------------------------------
  15
  16 #pragma clang diagnostic push
  17 #pragma clang diagnostic ignored "-Wtautological-compare"
  18 template <typename T>
  19 struct TS {
  20     void m() { T b; while (b==b); }
  21 };
  22 #pragma clang diagnostic pop
  23
  24 void f() {
  25     TS<int> ts;
  26     ts.m();
  27 }
  28
  29 //------------------------------------------------------------------------------
  30
  31 #define UNUSED_MACRO1 // expected-warning {{macro is not used}}
  32
  33 #pragma clang diagnostic push
  34 #pragma clang diagnostic ignored "-Wunused-macros"
  35 #define UNUSED_MACRO2
  36 #pragma clang diagnostic pop
  37
  38 //------------------------------------------------------------------------------
  39
  40 #pragma clang diagnostic push
  41 #pragma clang diagnostic ignored "-Wreturn-type"
  42 int g() { }
  43 #pragma clang diagnostic pop
  44
  45 //------------------------------------------------------------------------------
  46
  47 void ww(
  48 #pragma clang diagnostic push
  49 #pragma clang diagnostic ignored "-Wunused-parameter"
  50         int x,
  51 #pragma clang diagnostic pop
  52         int y) // expected-warning {{unused}}
  53 {
  54 }
  55
  56 //------------------------------------------------------------------------------
  57
  58 struct S2 {
  59     int x, y;
  60     S2() :
  61 #pragma clang diagnostic push
  62 #pragma clang diagnostic ignored "-Wreorder"
  63     y(),
  64     x()
  65 #pragma clang diagnostic pop
  66     {}
  67 };
  68
  69 //------------------------------------------------------------------------------
  70
  71 #define MYMACRO \
  72     _Pragma("clang diagnostic push") \
  73     _Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"") \
  74     _Pragma("clang diagnostic pop")
  75 MYMACRO
  76 #undef MYMACRO
  77
  78 //------------------------------------------------------------------------------