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|
%namespace foundry::parse::cst
start: directives rules
;
directives: -directives_chain- DIRECTIVE directives |
-end_of_directives- /* empty */
;
rules: -rules_chain- rule rules |
-end_of_rules- /* empty */
;
rule: IDENTIFIER ":" alternatives ";"
;
alternatives: alternative alternatives_tail
;
alternatives_tail:
-more_alternatives- "|" alternatives |
-end_of_alternatives- /* empty */
;
alternative: -unnamed_alternative- components |
-named_alternative- "-" IDENTIFIER "-" components
;
components: ( component repetition_qualifier ) *
;
repetition_qualifier:
-no_repetition- /* empty */ |
-zero_or_one- "?" |
-one_or_more- "+" |
-zero_or_more- "*"
;
component: -symbol- IDENTIFIER |
-literal- STRING_LITERAL |
-group- "(" components ")" |
-regex- REGEX
;
IDENTIFIER: /[a-zA-Z_][a-zA-Z0-9_]*/;
REGEX: /\/(\/|(\\.|[^*])(\\.|[^\/])*)\//;
DIRECTIVE: /%[^\n]*/;
STRING_LITERAL: /"(\\.|[^"])*"/;
|
