silex
==Overview==
Silex is a library for easily writing lexers in Scala. See the package silex for more information.
Attributes
Members list
Packages
package silex
This package is used to write lexers.
This package is used to write lexers.
=Lexer=
To define a lexer, mix-in the silex.Lexers trait.
object MyLexer extends Lexers {
// Type of characters consumed.
type Character = Char
// Type of positions.
type Position = MyPosition
// Type of tokens produced.
type Token = MyToken
// Then define your lexing rules using regular expressions.
val lex = Lexer(...)
// Then, you can query the lexer.
def apply(source: Source[Character, Position]): Iterator[Token] =
lex(source)
}
Additional traits can be mixed-in. See for instance silex.CharLexers for lexers specialized on Char.
=Data sources=
The input of lexers is in a form of a data source.
// Building a source from a string:
val stringSource = Source.fromString("[1, 2, 3]")
// Or from a file:
val fileSource = Source.fromFile("data/clients.json")
// With a custom positioner:
val customSource = Source.fromFile("data/clients.json", IndexPositioner)
Attributes
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