Extended maintenance of Ruby 1.9.3 ended on February 23, 2015. Read more
YAMLTree builds a YAML ast given a ruby object. For example:
builder = Psych::Visitors::YAMLTree.new builder << { :foo => 'bar' } builder.tree # => #<Psych::Nodes::Stream .. }
# File psych/lib/psych/visitors/yaml_tree.rb, line 15 def initialize options = {}, emitter = TreeBuilder.new, ss = ScalarScanner.new super() @started = false @finished = false @emitter = emitter @st = {} @ss = ss @options = options @coders = [] @dispatch_cache = Hash.new do |h,klass| method = "visit_#{(klass.name || '').split('::').join('_')}" method = respond_to?(method) ? method : h[klass.superclass] raise(TypeError, "Can't dump #{target.class}") unless method h[klass] = method end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 72 def accept target # return any aliases we find if @st.key? target.object_id oid = target.object_id node = @st[oid] anchor = oid.to_s node.anchor = anchor return @emitter.alias anchor end if target.respond_to?(:to_yaml) begin loc = target.method(:to_yaml).source_location.first if loc !~ /(syck\/rubytypes.rb|psych\/core_ext.rb)/ unless target.respond_to?(:encode_with) if $VERBOSE warn "implementing to_yaml is deprecated, please implement \"encode_with\"" end target.to_yaml(:nodump => true) end end rescue # public_method or source_location might be overridden, # and it's OK to skip it since it's only to emit a warning end end if target.respond_to?(:encode_with) dump_coder target else send(@dispatch_cache[target.class], target) end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 42 def finish @emitter.end_stream.tap do @finished = true end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 52 def push object start unless started? version = [] version = [1,1] if @options[:header] case @options[:version] when Array version = @options[:version] when String version = @options[:version].split('.').map { |x| x.to_i } else version = [1,1] end if @options.key? :version @emitter.start_document version, [], false accept object @emitter.end_document end
# File psych/lib/psych/visitors/yaml_tree.rb, line 36 def start encoding = Nodes::Stream::UTF8 @emitter.start_stream(encoding).tap do @started = true end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 48 def tree finish unless finished? end
# File psych/lib/psych/visitors/yaml_tree.rb, line 310 def visit_Array o if o.class == ::Array register o, @emitter.start_sequence(nil, nil, true, Nodes::Sequence::BLOCK) o.each { |c| accept c } @emitter.end_sequence else visit_array_subclass o end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 218 def visit_BigDecimal o @emitter.scalar o._dump, nil, '!ruby/object:BigDecimal', false, false, Nodes::Scalar::ANY end
# File psych/lib/psych/visitors/yaml_tree.rb, line 272 def visit_Class o raise TypeError, "can't dump anonymous class: #{o}" unless o.name register o, @emitter.scalar(o.name, nil, '!ruby/class', false, false, Nodes::Scalar::SINGLE_QUOTED) end
# File psych/lib/psych/visitors/yaml_tree.rb, line 190 def visit_Complex o register o, @emitter.start_mapping(nil, '!ruby/object:Complex', false, Nodes::Mapping::BLOCK) ['real', o.real.to_s, 'image', o.imag.to_s].each do |m| @emitter.scalar m, nil, nil, true, false, Nodes::Scalar::ANY end @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 166 def visit_DateTime o formatted = format_time o.to_time tag = '!ruby/object:DateTime' register o, @emitter.scalar(formatted, nil, tag, false, false, Nodes::Scalar::ANY) end
# File psych/lib/psych/visitors/yaml_tree.rb, line 143 def visit_Exception o tag = ['!ruby/exception', o.class.name].join ':' @emitter.start_mapping nil, tag, false, Nodes::Mapping::BLOCK { 'message' => private_iv_get(o, 'mesg'), 'backtrace' => private_iv_get(o, 'backtrace'), }.each do |k,v| next unless v @emitter.scalar k, nil, nil, true, false, Nodes::Scalar::ANY accept v end dump_ivars o @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 207 def visit_Float o if o.nan? @emitter.scalar '.nan', nil, nil, true, false, Nodes::Scalar::ANY elsif o.infinite? @emitter.scalar((o.infinite? > 0 ? '.inf' : '-.inf'), nil, nil, true, false, Nodes::Scalar::ANY) else @emitter.scalar o.to_s, nil, nil, true, false, Nodes::Scalar::ANY end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 285 def visit_Hash o tag = o.class == ::Hash ? nil : "!ruby/hash:#{o.class}" implicit = !tag register(o, @emitter.start_mapping(nil, tag, implicit, Psych::Nodes::Mapping::BLOCK)) o.each do |k,v| accept k accept v end @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 200 def visit_Integer o @emitter.scalar o.to_s, nil, nil, true, false, Nodes::Scalar::ANY end
# File psych/lib/psych/visitors/yaml_tree.rb, line 267 def visit_Module o raise TypeError, "can't dump anonymous module: #{o}" unless o.name register o, @emitter.scalar(o.name, nil, '!ruby/module', false, false, Nodes::Scalar::SINGLE_QUOTED) end
# File psych/lib/psych/visitors/yaml_tree.rb, line 320 def visit_NilClass o @emitter.scalar('', nil, 'tag:yaml.org,2002:null', true, false, Nodes::Scalar::ANY) end
# File psych/lib/psych/visitors/yaml_tree.rb, line 115 def visit_Object o tag = Psych.dump_tags[o.class] unless tag klass = o.class == Object ? nil : o.class.name tag = ['!ruby/object', klass].compact.join(':') end map = @emitter.start_mapping(nil, tag, false, Nodes::Mapping::BLOCK) register(o, map) dump_ivars o @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 107 def visit_Psych_Omap o seq = @emitter.start_sequence(nil, '!omap', false, Nodes::Sequence::BLOCK) register(o, seq) o.each { |k,v| visit_Hash k => v } @emitter.end_sequence end
# File psych/lib/psych/visitors/yaml_tree.rb, line 299 def visit_Psych_Set o register(o, @emitter.start_mapping(nil, '!set', false, Psych::Nodes::Mapping::BLOCK)) o.each do |k,v| accept k accept v end @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 277 def visit_Range o register o, @emitter.start_mapping(nil, '!ruby/range', false, Nodes::Mapping::BLOCK) ['begin', o.begin, 'end', o.end, 'excl', o.exclude_end?].each do |m| accept m end @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 177 def visit_Rational o register o, @emitter.start_mapping(nil, '!ruby/object:Rational', false, Nodes::Mapping::BLOCK) [ 'denominator', o.denominator.to_s, 'numerator', o.numerator.to_s ].each do |m| @emitter.scalar m, nil, nil, true, false, Nodes::Scalar::ANY end @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 162 def visit_Regexp o register o, @emitter.scalar(o.inspect, nil, '!ruby/regexp', false, false, Nodes::Scalar::ANY) end
# File psych/lib/psych/visitors/yaml_tree.rb, line 229 def visit_String o plain = false quote = false style = Nodes::Scalar::ANY if binary?(o) str = [o].pack('m').chomp tag = '!binary' # FIXME: change to below when syck is removed #tag = 'tag:yaml.org,2002:binary' style = Nodes::Scalar::LITERAL else str = o tag = nil quote = !(String === @ss.tokenize(o)) plain = !quote end ivars = find_ivars o if ivars.empty? unless o.class == ::String tag = "!ruby/string:#{o.class}" end @emitter.scalar str, nil, tag, plain, quote, style else maptag = '!ruby/string' maptag << ":#{o.class}" unless o.class == ::String register o, @emitter.start_mapping(nil, maptag, false, Nodes::Mapping::BLOCK) @emitter.scalar 'str', nil, nil, true, false, Nodes::Scalar::ANY @emitter.scalar str, nil, tag, plain, quote, style dump_ivars o @emitter.end_mapping end end
# File psych/lib/psych/visitors/yaml_tree.rb, line 129 def visit_Struct o tag = ['!ruby/struct', o.class.name].compact.join(':') register o, @emitter.start_mapping(nil, tag, false, Nodes::Mapping::BLOCK) o.members.each do |member| @emitter.scalar member.to_s, nil, nil, true, false, Nodes::Scalar::ANY accept o[member] end dump_ivars o @emitter.end_mapping end
# File psych/lib/psych/visitors/yaml_tree.rb, line 324 def visit_Symbol o @emitter.scalar ":#{o}", nil, nil, true, false, Nodes::Scalar::ANY end