Boost.NumericConversion
This is an older version and was released in 2021. The current version is 1.86.0.
C++
03
Added in Boost
1.32.0
Optimized Policy-based Numeric Conversions.
This Release
Boost.NumericConversion
The Boost Numeric Conversion library is a collection of tools to describe and perform conversions between values of different numeric types.
The documentation for the library can be found here