messages.attributeDescriptions.pin.html Maven / Gradle / Ivy

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Grammar-Kit library dedicated for language plugin developers.

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The number or pattern of expression to pin.

The contract:


  Pin is applied to items of grammar sequence expressions
  While matching a sequence parser will ignore errors after a pinned item


Parenthesized list example:

  {
    tokens=[number="regexp:\d+" comma="," paren1="(" paren2=")"]
  }
  list ::= "(" items? ")" {pin=1} // or {pin="("}
  private items ::= [!")" item (',' item) * ] {pin(".*")=1}
  item ::= number {recoverWhile=item_recover}
  private item_recover ::= !(")" | ",")