SYaml

The SYaml project provides a Pure Scala YAML 1.2 syntax processor that has no dependencies on external libraries.

About

This project includes the following:

• Lexer

  Converts YAML files to YEAST tokens.

  The lexer and the YEAST tokens are based on Haskell's YamlReference: YAML reference implementation.

• Parser

  Uses the lexer YEAST token output to generate a hierarchical model.

  The structure of the model matches the structure created by the YAML Reference Parser.

Features

• Complete YAML 1.2 processor
• Ability to parse all examples from the YAML specification

In development

• Java API and libraries
• JavaScript API and libraries
• Improve error messages
• Improve documentation
• Model golden tests

Usage

Lexer (YEAST Token Output)

The following example shows how to iterate through YEAST tokens:

private def generate(yamlFile: File, yeastFile: File) = {
  val out   = new PrintWriter(yeastFile)
  val lexer = YamlLexer(yamlFile)
  while (lexer.token != YamlToken.EndStream) {
    val data = YeastData(lexer.tokenData, lexer.tokenString)
    out.println(data)
    lexer.advance()
  }
  out.close()
}

Parser (Model Output)

The following example shows how to parse a file:

private def generate(yamlFile: File) = {
  val elements = YamlParser(yamlFile).parse()
  for (e <- elements) {
    println(e)
  }
}