YAML event parser class. This class parses a YAML document and calls events on the handler that is passed to the constructor. The events can be used for things such as constructing a YAML AST or deserializing YAML documents. It can even be fed back to Psych::Emitter to emit the same document that was parsed.

See Psych::Handler for documentation on the events that Psych::Parser emits.

Here is an example that prints out ever scalar found in a YAML document:

# Handler for detecting scalar values
class ScalarHandler < Psych::Handler
  def scalar value, anchor, tag, plain, quoted, style
    puts value

parser = Psych::Parser.new(ScalarHandler.new)

Here is an example that feeds the parser back in to Psych::Emitter. The YAML document is read from STDIN and written back out to STDERR:

parser = Psych::Parser.new(Psych::Emitter.new($stderr))

Psych uses Psych::Parser in combination with Psych::TreeBuilder to construct an AST of the parsed YAML document.



Let the parser choose the encoding

UTF-8 Encoding

UTF-16-LE Encoding with BOM

UTF-16-BE Encoding with BOM

Read & Write

The handler on which events will be called

Set the encoding for this parser to encoding

Class Methods

Creates a new Psych::Parser instance with handler. YAML events will be called on handler. See Psych::Parser for more details.

Instance Methods
No documentation available

Returns a Psych::Parser::Mark object that contains line, column, and index information.

Parse the YAML document contained in yaml. Events will be called on the handler set on the parser instance.

See Psych::Parser and Psych::Parser#handler