method

parse_stream

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parse_stream(yaml, filename = nil, &block) public

Parse a YAML string in yaml. Returns the Psych::Nodes::Stream. This method can handle multiple YAML documents contained in yaml. filename is used in the exception message if a Psych::SyntaxError is raised.

If a block is given, a Psych::Nodes::Document node will be yielded to the block as it’s being parsed.

Raises a Psych::SyntaxError when a YAML syntax error is detected.

Example:

Psych.parse_stream("---\n - a\n - b") # => #<Psych::Nodes::Stream:0x00>

Psych.parse_stream("--- a\n--- b") do |node|
  node # => #<Psych::Nodes::Document:0x00>
end

begin
  Psych.parse_stream("--- `", "file.txt")
rescue Psych::SyntaxError => ex
  ex.file    # => 'file.txt'
  ex.message # => "(file.txt): found character that cannot start any token"
end

See Psych::Nodes for more information about YAML AST.

Show source

# File ext/psych/lib/psych.rb, line 399
  def self.parse_stream yaml, filename = nil, &block
    if block_given?
      parser = Psych::Parser.new(Handlers::DocumentStream.new(&block))
      parser.parse yaml, filename
    else
      parser = self.parser
      parser.parse yaml, filename
      parser.handler.root
    end
  end

parse_stream

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