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Standard library header <stdfloat> (C++23)

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C++
Standard library headers

This header is part of the type support library, providing fixed width floating-point types .

Contents

Types

(C++23) (optional)
binary floating-point type with width of exactly 16, 32, 64, and 128 bits respectively
(typedef)
(C++23) (optional)
brain floating-point type with 16 bits exactly
(typedef)

Notes

The fixed width floating-point types must be aliases to extended floating-point types (not float / double / long double ), therefore not drop-in replacements for standard floating-point types.

Synopsis 

namespace std {
  #if defined(__STDCPP_FLOAT16_T__)
    using float16_t  = /* implementation-defined */;
  #endif
  #if defined(__STDCPP_FLOAT32_T__)
    using float32_t  = /* implementation-defined */;
  #endif
  #if defined(__STDCPP_FLOAT64_T__)
    using float64_t  = /* implementation-defined */;
  #endif
  #if defined(__STDCPP_FLOAT128_T__)
    using float128_t = /* implementation-defined */;
  #endif
  #if defined(__STDCPP_BFLOAT16_T__)
    using bfloat16_t = /* implementation-defined */;
  #endif
}

References

  • C++23 standard (ISO/IEC 14882:2024):
  • 17.5 Header <stdfloat> synopsis [stdfloat.syn]