scala-parser-combinators/scala.util.parsing.combinator.lexical

scala.util.parsing.combinator.lexical

package scala.util.parsing.combinator.lexical

Type members

Classlikes

abstract class Lexical extends Scanners with Tokens
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.
trait Scanners extends Parsers
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.
class StdLexical extends Lexical with StdTokens
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.)