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