llvm-project/clang/test/SemaOpenCL/func_ptr.cl

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// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only
void foo(void*);
void bar()
{
// declaring a function pointer is an error
void (*fptr)(int); // expected-error{{pointers to functions are not allowed}}
// taking the address of a function is an error
foo((void*)foo); // expected-error{{taking address of function is not allowed}}
foo(&foo); // expected-error{{taking address of function is not allowed}}
// initializing an array with the address of functions is an error
void* vptrarr[2] = {foo, &foo}; // expected-error{{taking address of function is not allowed}} expected-error{{taking address of function is not allowed}}
// just calling a function is correct
foo(0);
}