clang/test/Sema/block-args.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -verify -fblocks
   2
   3 void take(void*);
   4
   5 void test(void) {
   6   take(^(int x){});
   7   take(^(int x, int y){});
   8   take(^(int x, int y){});
   9   take(^(int x,      // expected-note {{previous declaration is here}}
  10          int x){});  // expected-error {{redefinition of parameter 'x'}}
  11
  12
  13   take(^(int x) { return x+1; });
  14
  15   int (^CP)(int) = ^(int x) { return x*x; };
  16   take(CP);
  17
  18   int arg;
  19   ^{return 1;}();
  20   ^{return 2;}(arg); // expected-error {{too many arguments to block call}}
  21   ^(void){return 3;}(1); // expected-error {{too many arguments to block call}}
  22   ^(){return 4;}(arg); // expected-error {{too many arguments to block call}}
  23   ^(int x, ...){return 5;}(arg, arg);   // Explicit varargs, ok.
  24 }
  25
  26 int main(int argc, char** argv) {
  27   ^(int argCount) {
  28     argCount = 3;
  29   }(argc);
  30 }
  31
  32 void f0(void) {
  33   ^(int, double d, char) {}(1, 1.34, 'a'); // expected-warning {{omitting the parameter name in a function definition is a C23 extension}} \
  34                                            // expected-warning {{omitting the parameter name in a function definition is a C23 extension}}
  35 }
  36
  37 void test4(void) {
  38   int (^f)(void) = ^((x)) { }; // expected-error {{type specifier missing}} expected-error {{type-id cannot have a name}}
  39 }
  40
  41 void test5_helper(void (^)(int, int[*]));
  42 void test5(void) {
  43   test5_helper(^(int n, int array[n]) {});
  44 }
  45
  46 // Reduced from a problem on platforms where va_list is an array.
  47 struct tag {
  48   int x;
  49 };
  50 typedef struct tag array_ty[1];
  51 void test6(void) {
  52   void (^block)(array_ty) = ^(array_ty arr) { };
  53   array_ty arr;
  54   block(arr);
  55 }