clang/test/Preprocessor/pragma_diagnostic_sections.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -Wall -Wunused-macros -Wunused-parameter -Wno-uninitialized -verify %s
   2
   3 // rdar://8365684
   4 struct S {
   5     void m1() { int b; while (b==b); } // expected-warning {{always evaluates to true}}
   6
   7 #pragma clang diagnostic push
   8 #pragma clang diagnostic ignored "-Wtautological-compare"
   9     void m2() { int b; while (b==b); }
  10 #pragma clang diagnostic pop
  11
  12     void m3() { int b; while (b==b); } // expected-warning {{always evaluates to true}}
  13 };
  14
  15 //------------------------------------------------------------------------------
  16
  17 #pragma clang diagnostic push
  18 #pragma clang diagnostic ignored "-Wtautological-compare"
  19 template <typename T>
  20 struct TS {
  21     void m() { T b; while (b==b); }
  22 };
  23 #pragma clang diagnostic pop
  24
  25 void f() {
  26     TS<int> ts;
  27     ts.m();
  28 }
  29
  30 //------------------------------------------------------------------------------
  31
  32 #define UNUSED_MACRO1 // expected-warning {{macro is not used}}
  33
  34 #pragma clang diagnostic push
  35 #pragma clang diagnostic ignored "-Wunused-macros"
  36 #define UNUSED_MACRO2
  37 #pragma clang diagnostic pop
  38
  39 //------------------------------------------------------------------------------
  40
  41 #pragma clang diagnostic push
  42 #pragma clang diagnostic ignored "-Wreturn-type"
  43 int g() { }
  44 #pragma clang diagnostic pop
  45
  46 //------------------------------------------------------------------------------
  47
  48 void ww(
  49 #pragma clang diagnostic push
  50 #pragma clang diagnostic ignored "-Wunused-parameter"
  51         int x,
  52 #pragma clang diagnostic pop
  53         int y) // expected-warning {{unused}}
  54 {
  55 }
  56
  57 //------------------------------------------------------------------------------
  58
  59 struct S2 {
  60     int x, y;
  61     S2() :
  62 #pragma clang diagnostic push
  63 #pragma clang diagnostic ignored "-Wreorder"
  64     y(),
  65     x()
  66 #pragma clang diagnostic pop
  67     {}
  68 };
  69
  70 //------------------------------------------------------------------------------
  71
  72 // rdar://8790245
  73 #define MYMACRO \
  74     _Pragma("clang diagnostic push") \
  75     _Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"") \
  76     _Pragma("clang diagnostic pop")
  77 MYMACRO
  78 #undef MYMACRO
  79
  80 //------------------------------------------------------------------------------