f6198686b8
This is another case where we don't have a paper number for the feature but know about it from the editor's reports.
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
// RUN: %clang_cc1 -verify -std=c99 -ffreestanding %s
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// RUN: %clang_cc1 -verify -std=gnu89 -ffreestanding %s
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// RUN: %clang_cc1 -verify -std=c89 -ffreestanding %s
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// expected-no-diagnostics
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/* WG14 ???: Clang 16
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* Additional floating-point characteristics in <float.h>
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*
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* NB: the original paper number is unknown, this was gleaned from the editor's
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* report in the C99 foreword. There were two new additions to <float.h> in
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* C99, this is testing that we support both of them.
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*
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* Clang added the macros at least as far back as Clang 3.0, but it wasn't
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* until Clang 16.0 that we stopped accidentally providing FLT_EVAL_METHOD in
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* C89 (strict) mode.
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*/
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#include <float.h>
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// We expect all the definitions in C99 mode.
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#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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#define EXPECT_DECIMAL_DIG
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#define EXPECT_FLT_EVAL_METHOD
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#endif
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// If we're not in C99 mode, we still expect the definition of DECIMAL_DIG
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// unless we're in strict ansi mode.
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#if !defined(EXPECT_DECIMAL_DIG) && !defined(__STRICT_ANSI__)
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#define EXPECT_DECIMAL_DIG
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#endif
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#if defined(EXPECT_DECIMAL_DIG)
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#if !defined(DECIMAL_DIG)
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#error "DECIMAL_DIG missing"
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#endif
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#else
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#if defined(DECIMAL_DIG)
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#error "DECIMAL_DIG provided when not expected"
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#endif
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#endif
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#if defined(EXPECT_FLT_EVAL_METHOD)
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#if !defined(FLT_EVAL_METHOD)
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#error "FLT_EVAL_METHOD missing"
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#endif
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#else
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#if defined(FLT_EVAL_METHOD)
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#error "FLT_EVAL_METHOD provided when not expected"
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#endif
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#endif
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