In Files
- psych/lib/psych/tree_builder.rb
Parent
Class/Module Index
- Kernel
- Module
- Object
- Psych
- Psych::BadAlias
- Psych::ClassLoader
- Psych::ClassLoader::Restricted
- Psych::Coder
- Psych::DisallowedClass
- Psych::Emitter
- Psych::Exception
- Psych::Handler
- Psych::Handler::DumperOptions
- Psych::Handlers
- Psych::Handlers::Recorder
- Psych::JSON
- Psych::JSON::Stream
- Psych::JSON::TreeBuilder
- Psych::Nodes
- Psych::Nodes::Alias
- Psych::Nodes::Document
- Psych::Nodes::Mapping
- Psych::Nodes::Node
- Psych::Nodes::Scalar
- Psych::Nodes::Sequence
- Psych::Nodes::Stream
- Psych::Omap
- Psych::Parser
- Psych::Parser::Mark
- Psych::ScalarScanner
- Psych::Set
- Psych::Stream
- Psych::Streaming
- Psych::Streaming::ClassMethods
- Psych::SyntaxError
- Psych::TreeBuilder
- Psych::Visitors
- Psych::Visitors::DepthFirst
- Psych::Visitors::Emitter
- Psych::Visitors::JSONTree
- Psych::Visitors::NoAliasRuby
- Psych::Visitors::ToRuby
- Psych::Visitors::Visitor
- Psych::Visitors::YAMLTree
- Regexp
Psych::TreeBuilder
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.
Public Class Methods
new()
Create a new TreeBuilder instance
# File psych/lib/psych/tree_builder.rb, line 22 def initialize @stack = [] @last = nil @root = nil end
Public Instance Methods
alias(anchor)
# File psych/lib/psych/tree_builder.rb, line 81 def alias anchor @last.children << Nodes::Alias.new(anchor) end
end_document(implicit_end = !streaming?)
Handles #end_document
events with version
, tag_directives
, and
implicit
styling.
See Psych::Handler#start_document
# File psych/lib/psych/tree_builder.rb, line 61 def end_document implicit_end = !streaming? @last.implicit_end = implicit_end pop end
scalar(value, anchor, tag, plain, quoted, style)
# File psych/lib/psych/tree_builder.rb, line 75 def scalar value, anchor, tag, plain, quoted, style s = Nodes::Scalar.new(value,anchor,tag,plain,quoted,style) @last.children << s s end
start_document(version, tag_directives, implicit)
Handles #start_document events
with version
, tag_directives
, and
implicit
styling.
See Psych::Handler#start_document
# File psych/lib/psych/tree_builder.rb, line 50 def start_document version, tag_directives, implicit n = Nodes::Document.new version, tag_directives, implicit @last.children << n push n end