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.
22 lines
1.6 KiB
C
22 lines
1.6 KiB
C
// RUN: %clang_cc1 -x c -verify %s
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// Primary fixed point types
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signed short _Accum s_short_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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signed _Accum s_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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signed long _Accum s_long_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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unsigned short _Accum u_short_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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unsigned _Accum u_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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unsigned long _Accum u_long_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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// Aliased fixed point types
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short _Accum short_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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_Accum accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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// expected-error@-1{{type specifier missing, defaults to 'int'}}
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long _Accum long_accum; // expected-error{{compile with '-ffixed-point' to enable fixed point types}}
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// Cannot use fixed point suffixes
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int accum_int = 10k; // expected-error{{invalid suffix 'k' on integer constant}}
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int fract_int = 10r; // expected-error{{invalid suffix 'r' on integer constant}}
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float accum_flt = 10.0k; // expected-error{{invalid suffix 'k' on floating constant}}
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float fract_flt = 10.0r; // expected-error{{invalid suffix 'r' on floating constant}}
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