llvm-project/clang/test/Sema/declspec.c

// RUN: clang-cc %s -verify -fsyntax-only
typedef char T[4];

T foo(int n, int m) {  }  // expected-error {{cannot return array or function}}

void foof(const char *, ...) __attribute__((__format__(__printf__, 1, 2))), barf (void);

int typedef validTypeDecl() { } // expected-error {{function definition declared 'typedef'}}

struct _zend_module_entry { }
typedef struct _zend_function_entry { } // expected-error {{cannot combine with previous 'struct' declaration specifier}}
static void buggy(int *x) { } // expected-error {{function definition declared 'typedef'}} \
                              // expected-error {{cannot combine with previous 'typedef' declaration specifier}} \
                              // expected-error {{cannot combine with previous 'struct' declaration specifier}}

// Type qualifiers.
typedef int f(void); 
typedef f* fptr;
const f* v1;         // expected-warning {{qualifier on function type 'f' (aka 'int (void)') has unspecified behavior}}
__restrict__ f* v2;  // expected-error {{restrict requires a pointer or reference ('f' (aka 'int (void)') is invalid)}}
__restrict__ fptr v3; // expected-error {{pointer to function type 'f' (aka 'int (void)') may not be 'restrict' qualified}}
f *__restrict__ v4;   // expected-error {{pointer to function type 'f' (aka 'int (void)') may not be 'restrict' qualified}}