type-spec-struct-union.c revision 3218c4bb3b5d7250f12420de6db7ef3e3f805a75
1// RUN: clang -fsyntax-only -pedantic -verify %s 2 3/* This test checks the introduction of struct and union types based 4 on a type specifier of the form "struct-or-union identifier" when they 5 type has not yet been declared. See C99 6.7.2.3p8. */ 6 7typedef struct S1 { 8 union { 9 struct S2 *x; 10 struct S3 *y; 11 } u1; 12} S1; 13 14int test_struct_scope(S1 *s1, struct S2 *s2, struct S3 *s3) { 15 if (s1->u1.x == s2) return 1; 16 if (s1->u1.y == s3) return 1; 17 return 0; 18} 19 20int test_struct_scope_2(S1 *s1) { 21 struct S2 { int x; } *s2 = 0; 22 if (s1->u1.x == s2) return 1; /* expected-warning {{comparison of distinct pointer types ('struct S2 *' and 'struct S2 *')}} */ 23 return 0; 24} 25 26// FIXME: We do not properly implement C99 6.2.1p4, which says that 27// the type "struct S4" declared in the function parameter list has 28// block scope within the function definition. The problem, in this 29// case, is that the code is ill-formed but we warn about the two S4's 30// being incompatible (we think they are two different types). 31int test_struct_scope_3(struct S4 * s4) { // expected-warning{{declaration of 'struct S4' will not be visible outside of this function}} 32 struct S4 { int y; } *s4_2 = 0; 33 /* if (s4 == s4_2) return 1; */ 34 return 0; 35} 36 37void f(struct S5 { int y; } s5); // expected-warning{{declaration of 'struct S5' will not be visible outside of this function}} 38