scala.util.parsing.combinator.lexical

This component complements the Scanners component with common operations for lexical parsers.

Refer to scala.util.parsing.combinator.lexical.StdLexical for a concrete implementation for a simple, Scala-like language.

This component provides core functionality for lexical parsers.

See its subclasses scala.util.parsing.combinator.lexical.Lexical and -- most interestingly scala.util.parsing.combinator.lexical.StdLexical, for more functionality.

This component provides a standard lexical parser for a simple, Scala-like language. It parses keywords and identifiers, numeric literals (integers), strings, and delimiters.

To distinguish between identifiers and keywords, it uses a set of reserved identifiers: every string contained in reserved is returned as a keyword token. (Note that => is hard-coded as a keyword.) Additionally, the kinds of delimiters can be specified by the delimiters set.

Usually this component is used to break character-based input into bigger tokens, which are then passed to a token-parser (see scala.util.parsing.combinator.syntactical.TokenParsers.)