static const bool has_infinity; | (until C++11) | |

static constexpr bool has_infinity; | (since C++11) |

The value of `std::numeric_limits<T>::has_infinity`

is `true`

for all types `T`

capable of representing the positive infinity as a distinct special value. This constant is meaningful for all floating-point types and is guaranteed to be `true`

if `std::numeric_limits<T>::is_iec559 == true`

.

`T` | value of `std::numeric_limits<T>::has_infinity` |
---|---|

/* non-specialized */ | `false` |

`bool` | `false` |

`char` | `false` |

`signed char` | `false` |

`unsigned char` | `false` |

`wchar_t` | `false` |

`char16_t` | `false` |

`char32_t` | `false` |

`short` | `false` |

`unsigned short` | `false` |

`int` | `false` |

`unsigned int` | `false` |

`long` | `false` |

`unsigned long` | `false` |

`long long` | `false` |

`unsigned long long` | `false` |

`float` | usually `true` |

`double` | usually `true` |

`long double` | usually `true` |

[static] | returns the positive infinity value of the given floating-point type (public static member function) |

[static] | identifies floating-point types that can represent the special value "quiet not-a-number" (NaN) (public static member constant) |

[static] | identifies floating-point types that can represent the special value "signaling not-a-number" (NaN) (public static member constant) |

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