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