Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This version of Boost is under active development. You are currently in the master branch. The current version is 1.90.0.

value::is_number

`value::is_number`

Check if this is a number.

bool
is_number() const noexcept;

This function returns true when kind() is one of kind::int64, kind::uint64, or kind::double_.

Constant.

No-throw guarantee.