whitespace:ws          = [ \b\f\r\t\v];
comment-line:alias     = "#" [^\n]*;
comment                = comment-line ("\n" comment-line)*;
quoted:alias:nows      = "\"" ([^\\"] | "\\" .)* "\"";
word:alias:nows        = [a-zA-Z_]([a-zA-Z_0-9\-] | "\\" .)*;
key                    = word | quoted;
value-chars:alias:nows = ([^\\"\n=# \b\f\r\t\v] | "\\" .)+;
value                  = value-chars+ | quoted;
key-val                = (comment "\n")? key ("=" value?)? comment-line?;
doc:root               = (key-val | comment-line | "\n")*;