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/* RUN: %clang_cc1 -std=c89 -verify=expected,c89only -pedantic -Wno-c11-extensions %s
RUN: %clang_cc1 -std=c99 -verify=expected -pedantic -Wno-c11-extensions %s
RUN: %clang_cc1 -std=c11 -verify=expected -pedantic %s
RUN: %clang_cc1 -std=c17 -verify=expected -pedantic %s
RUN: %clang_cc1 -std=c2x -verify=expected -pedantic %s
*/
/* WG14 DR502:
* Flexible array member in an anonymous struct
*/
void dr502(void) {
/* This is EXAMPLE 3 from 6.7.2.1 and is intended to show that a flexible
* array member can be used when the only other members of the class are from
* an anonymous structure member.
*/
struct s {
struct { int i; };
int a[]; /* c89only-warning {{flexible array members are a C99 feature}} */
};
/* This is a slightly modified example that looks to see whether the
* anonymous structure itself can provide a flexible array member for the
* containing class.
*
* The committee does not think this is valid because it would mean the
* anonymous structure would have size 0. Additionally, the anonymous
* structure has no additional members and so the flexible array member is
* not valid within the anonymous structure.
*/
struct t {
int i;
struct { int a[]; }; /* expected-error {{flexible array member 'a' not allowed in otherwise empty struct}}
c89only-warning {{flexible array members are a C99 feature}}
expected-warning {{'' may not be nested in a struct due to flexible array member}}
*/
};
}
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