when a C/C++ programmer says "no dependencies" it means they have copied unknown versions of various dependencies into a particular subdirectory of their project.
you can learn a lot about the author's personality by what directory name they choose.
"vendor" -> web developer adjacent
"deps" -> uncomfortably self-aware
"thirdparty" -> unskilled grifter
"common" -> sneaky
alternate joke:
what they say: no dependencies
what they mean: over half of the project's line count by volume was written by Sean Barrett
@andrewrk alternate alternate joke: the library is a single header containing 300 kB of templates