diff options
Diffstat (limited to 'ruby_1_9_3/ext/psych/lib/psych/tree_builder.rb')
-rw-r--r-- | ruby_1_9_3/ext/psych/lib/psych/tree_builder.rb | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/ruby_1_9_3/ext/psych/lib/psych/tree_builder.rb b/ruby_1_9_3/ext/psych/lib/psych/tree_builder.rb deleted file mode 100644 index c8f344787c..0000000000 --- a/ruby_1_9_3/ext/psych/lib/psych/tree_builder.rb +++ /dev/null @@ -1,96 +0,0 @@ -require 'psych/handler' - -module Psych - ### - # This class works in conjunction with Psych::Parser to build an in-memory - # parse tree that represents a YAML document. - # - # == Example - # - # parser = Psych::Parser.new Psych::TreeBuilder.new - # parser.parse('--- foo') - # tree = parser.handler.root - # - # See Psych::Handler for documentation on the event methods used in this - # class. - class TreeBuilder < Psych::Handler - # Returns the root node for the built tree - attr_reader :root - - # Create a new TreeBuilder instance - def initialize - @stack = [] - @last = nil - @root = nil - end - - %w{ - Sequence - Mapping - }.each do |node| - class_eval %{ - def start_#{node.downcase}(anchor, tag, implicit, style) - n = Nodes::#{node}.new(anchor, tag, implicit, style) - @last.children << n - push n - end - - def end_#{node.downcase} - pop - end - } - end - - ### - # Handles start_document events with +version+, +tag_directives+, - # and +implicit+ styling. - # - # See Psych::Handler#start_document - def start_document version, tag_directives, implicit - n = Nodes::Document.new version, tag_directives, implicit - @last.children << n - push n - end - - ### - # Handles end_document events with +version+, +tag_directives+, - # and +implicit+ styling. - # - # See Psych::Handler#start_document - def end_document implicit_end = !streaming? - @last.implicit_end = implicit_end - pop - end - - def start_stream encoding - @root = Nodes::Stream.new(encoding) - push @root - end - - def end_stream - pop - end - - def scalar value, anchor, tag, plain, quoted, style - s = Nodes::Scalar.new(value,anchor,tag,plain,quoted,style) - @last.children << s - s - end - - def alias anchor - @last.children << Nodes::Alias.new(anchor) - end - - private - def push value - @stack.push value - @last = value - end - - def pop - x = @stack.pop - @last = @stack.last - x - end - end -end |