M

metalanguage

PEGN is a universal notation for expressing any grammar in a way that is easy to parse cognitively and programmatically without any specific implementation in mind.

PEGN Parser Interface and AST Reference Implementation in Go (golang)

order-pp preprocessor library (standalone part of chaos-pp)

https://github.com/rofl0r/order-pp

chaos preprocessor library. This is what boost preprocessor derived from.

https://github.com/rofl0r/chaos-pp