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2cb2cd242c
C89 allowed a type specifier to be elided with the resulting type being int, aka implicit int behavior. This feature was subsequently removed in C99 without a deprecation period, so implementations continued to support the feature. Now, as with implicit function declarations, is a good time to reevaluate the need for this support. This patch allows -Wimplicit-int to issue warnings in C89 mode (off by default), defaults the warning to an error in C99 through C17, and disables support for the feature entirely in C2x. It also removes a warning about missing declaration specifiers that really was just an implicit int warning in disguise and other minor related cleanups.
33 lines
773 B
C++
33 lines
773 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// Don't crash.
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template<typename,typename=int,typename=int>struct basic_string;
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typedef basic_string<char> string;
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template<typename aT,typename,typename oc>
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struct basic_string
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{
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int us;
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basic_string(const aT*,const oc&a=int());
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int _S_construct();
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int _S_construct(int);
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_S_construct(); // expected-error {{a type specifier is required}}
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};
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template<typename _CharT,typename _Traits,typename _Alloc>
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basic_string<_CharT,_Traits,_Alloc>::basic_string(const _CharT* c,const _Alloc&)
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:us(_S_construct)
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{string a(c);}
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struct runtime_error{runtime_error(string);};
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struct system_error:runtime_error{ // expected-note {{to match}}
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system_error():time_error("" // expected-error 3 {{expected}} expected-note {{to match}}
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