Ecosyste.ms: Packages

An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.

conda-forge.org "optional" keyword

optional-lite 3.5.0
optional lite - A C++17-like optional, a nullable object for C++98, C++11 and later in a single-f...
2 versions - Latest release: over 2 years ago - 1 dependent repositories - 363 stars on GitHub