Have you had a look at the syntax proposed by the different [pattern matching modules](https://github.com/nim-lang/Nim/wiki/Curated-Packages#language)?
- stdlib pattern matching feedback haxscramper_
- stdlib pattern matching feedback spip
- stdlib pattern matching feedback haxscramper_
- stdlib pattern matching feedback elcritch
- stdlib pattern matching feedback sschwarzer
- stdlib pattern matching feedback haxscramper_
- stdlib pattern matching feedback Araq
- stdlib pattern matching feedbac... haxscramper_
- stdlib pattern matching feedbac... Araq
- stdlib pattern matching feedbac... haxscramper_
