Make identifier token regex less restrictive: FQDNs, URLs etc. can be valid identifiers.
This breaks leaf-node comments, let's see if it will work with
exclusive state for comments.
Add ParseError exception to .configfile.curly imports.
Remove support for convering numbers string to integers.
We will leave this to type checkers and applications.
Add exclusive state for /* */ comments to the curly lexer.
Seems to fix leaf node comments too.
Remove NEWLINE from lexer token list.
Seems there's no need to expose it while we don't use it in parser rules.