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x/ohm_js/src/built-in-rules.ohm

A library and language for building parsers, interpreters, compilers, etc.
harc/ohm
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BuiltInRules {
  alnum  (an alpha-numeric character)    = letter    | digit  letter  (a letter)    = lower    | upper    | unicodeLtmo  digit  (a digit)    = "0".."9"  hexDigit  (a hexadecimal digit)    = digit    | "a".."f"    | "A".."F"  ListOf<elem, sep>    = NonemptyListOf<elem, sep>    | EmptyListOf<elem, sep>  NonemptyListOf<elem, sep>    = elem (sep elem)*  EmptyListOf<elem, sep>    = /* nothing */  listOf<elem, sep>    = nonemptyListOf<elem, sep>    | emptyListOf<elem, sep>  nonemptyListOf<elem, sep>    = elem (sep elem)*  emptyListOf<elem, sep>    = /* nothing */  // Allows a syntactic rule application within a lexical context.  applySyntactic<app> = app}