Grammar

Grammar

The following pages contain a formal description of the Dyvil grammar. The production rules are provided in a format shown below.

Grammar Format

  • Rules are written in the form name : value and can be referenced by name.
  • Literals: Literal Tokens are denoted with '' or "". Example: myRule : myRule '.' myRule
  • Optional Tokens or Expressions are denoted with a postfix ? or surrounded by square brackets [ ]. Example: myRule : '1'? myRule
  • Lists: Repeated token sequences that are valid once or more are denoted with {}. Example: octalNum : '0x'? octal { octal }
  • Variations are either denoted with | or by defining the same rule multiple times.
  • Exclusions: If a rule or literal should not be matched, it can be excluded with ^. Example: charLiteral : "'" { any ^ "'" }? "'"

Note

Please note that this is not an exact representation of the Dyvil grammar. It does not account for Semicolon Inference or operator precedence, as these are context-dependent and cannot easily be represented in a formal grammar. Furthermore, it might be possible that the actual Dyvil parser as used by the Dyvil Compiler accepts a wider grammar, and would not raise an error in cases in which a parser built from this grammar would.
Last modified 5yr ago