There is a definition file on unicode spec about a character should be n half-width in monospacr context. Not sure if it includes all symbol though. Also don't

There is a definition file on unicode spec about a character should be n half-width in monospacr context. Not sure if it includes all symbol though. Also don't know if it handles symbol that has more than 2 half-width https://www.unicode.org/reports/tr11/ https://www.unicode.org/reports/tr11/