On Sunday, 24 January 2021 at 20:05:47 UTC, WhatMeWorry wrote:
mentions the $ signs, as well as the $1 and $3.
See point 4 here: https://dlang.org/spec/ddoc.html#macros $(THING ...)is a macro invocation. Inside the macro definition, $0 is the full text represented by "..." here. Then $1 is the text up to the first comma, $2 text from first to second comma, etc.