clang/test/Sema/warn-shadow.c

   1 // RUN: %clang_cc1 -verify -fsyntax-only -fblocks -Wshadow %s
   2
   3 int i;          // expected-note 4 {{previous declaration is here}}
   4 static int s;   // expected-note 2 {{previous declaration is here}}
   5
   6 void foo(void) {
   7   int pass1;
   8   int i;        // expected-warning {{declaration shadows a variable in the global scope}} \
   9                 // expected-note {{previous declaration is here}}
  10   int s;        // expected-warning {{declaration shadows a variable in the global scope}} \
  11                 // expected-note {{previous declaration is here}}
  12   {
  13     int pass2;
  14     int i;      // expected-warning {{declaration shadows a local variable}} \
  15                 // expected-note {{previous declaration is here}}
  16     int s;      // expected-warning {{declaration shadows a local variable}} \
  17                 // expected-note {{previous declaration is here}}
  18     {
  19       int pass3;
  20       int i;    // expected-warning {{declaration shadows a local variable}}
  21       int s;    // expected-warning {{declaration shadows a local variable}}
  22     }
  23   }
  24
  25   int sin; // okay; 'sin' has not been declared, even though it's a builtin.
  26 }
  27
  28 void (^test1)(int) = ^(int i) { // expected-warning {{declaration shadows a variable in the global scope}} \
  29                                  // expected-note{{previous declaration is here}}
  30   {
  31     int i; // expected-warning {{declaration shadows a local variable}} \
  32            // expected-note{{previous declaration is here}}
  33
  34     (^(int i) { return i; })(i); //expected-warning {{declaration shadows a local variable}}
  35   }
  36 };
  37
  38
  39 struct test2 {
  40   int i;
  41 };
  42
  43 void test3(void) {
  44   struct test4 {
  45     int i;
  46   };
  47 }
  48
  49 void test4(int i) { // expected-warning {{declaration shadows a variable in the global scope}}
  50 }
  51
  52 // Don't warn about shadowing for function declarations.
  53 void test5(int i);
  54 void test6(void (*f)(int i)) {}
  55 void test7(void *context, void (*callback)(void *context)) {}
  56
  57 extern int bob; // expected-note {{previous declaration is here}}
  58
  59 void rdar8883302(void) {
  60   extern int bob; // don't warn for shadowing.
  61 }
  62
  63 void test8(void) {
  64   int bob; // expected-warning {{declaration shadows a variable in the global scope}}
  65 }
  66
  67 enum PR24718_1{pr24718}; // expected-note {{previous declaration is here}}
  68 void PR24718(void) {
  69   enum PR24718_2{pr24718}; // expected-warning {{declaration shadows a variable in the global scope}}
  70 }
  71
  72 struct PR24718_3;
  73 struct PR24718_4 {
  74   enum {
  75     PR24718_3 // Does not shadow a type.
  76   };
  77 };
  78
  79 void static_locals() {
  80   static int i; // expected-warning {{declaration shadows a variable in the global scope}}
  81                 // expected-note@-1 {{previous definition is here}}
  82                 // expected-note@-2 {{previous declaration is here}}
  83   int i;        // expected-error {{non-static declaration of 'i' follows static declaration}}
  84   static int foo; // expected-note {{previous declaration is here}}
  85   static int hoge; // expected-note {{previous declaration is here}}
  86   int s; // expected-warning {{declaration shadows a variable in the global scope}}
  87   {
  88     static int foo; // expected-warning {{declaration shadows a local variable}}
  89                     // expected-note@-1 {{previous declaration is here}}
  90     static int i; // expected-warning {{declaration shadows a local variable}}
  91                   // expected-note@-1 {{previous declaration is here}}
  92     int hoge; // expected-warning {{declaration shadows a local variable}}
  93     {
  94       static int foo; // expected-warning {{declaration shadows a local variable}}
  95       int i; // expected-warning {{declaration shadows a local variable}}
  96       extern int hoge;
  97     }
  98   }
  99 }