Merge psych-3.0.0.beta4 from upstream.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60917 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

5 files changed, 63 insertions, 6 deletions

diff --git a/ext/psych/lib/psych/handler.rb b/ext/psych/lib/psych/handler.rb
index 1074c18f9e..84a3b4f2bc 100644
--- a/ext/psych/lib/psych/handler.rb
+++ b/ext/psych/lib/psych/handler.rb
@@ -242,6 +242,11 @@ module Psych
     end
 
     ###
+    # Called before each event with line/column information.
+    def event_location(start_line, start_column, end_line, end_column)
+    end
+
+    ###
     # Is this handler a streaming handler?
     def streaming?
       false
diff --git a/ext/psych/lib/psych/nodes/node.rb b/ext/psych/lib/psych/nodes/node.rb
index 1c7672164d..6d86669a17 100644
--- a/ext/psych/lib/psych/nodes/node.rb
+++ b/ext/psych/lib/psych/nodes/node.rb
@@ -17,6 +17,18 @@ module Psych
       # An associated tag
       attr_reader :tag
 
+      # The line number where this node start
+      attr_accessor :start_line
+
+      # The column number where this node start
+      attr_accessor :start_column
+
+      # The line number where this node ends
+      attr_accessor :end_line
+
+      # The column number where this node ends
+      attr_accessor :end_column
+
       # Create a new Psych::Nodes::Node
       def initialize
         @children = []
diff --git a/ext/psych/lib/psych/tree_builder.rb b/ext/psych/lib/psych/tree_builder.rb
index b10fd5c5cd..47a1695643 100644
--- a/ext/psych/lib/psych/tree_builder.rb
+++ b/ext/psych/lib/psych/tree_builder.rb
@@ -23,6 +23,18 @@ module Psych
       @stack = []
       @last  = nil
       @root  = nil
+
+      @start_line   = nil
+      @start_column = nil
+      @end_line     = nil
+      @end_column   = nil
+    end
+
+    def event_location(start_line, start_column, end_line, end_column)
+      @start_line   = start_line
+      @start_column = start_column
+      @end_line     = end_line
+      @end_column   = end_column
     end
 
     %w{
@@ -32,12 +44,15 @@ module Psych
       class_eval %{
         def start_#{node.downcase}(anchor, tag, implicit, style)
           n = Nodes::#{node}.new(anchor, tag, implicit, style)
+          set_start_location(n)
           @last.children << n
           push n
         end
 
         def end_#{node.downcase}
-          pop
+          n = pop
+          set_end_location(n)
+          n
         end
       }
     end
@@ -49,6 +64,7 @@ module Psych
     # See Psych::Handler#start_document
     def start_document version, tag_directives, implicit
       n = Nodes::Document.new version, tag_directives, implicit
+      set_start_location(n)
       @last.children << n
       push n
     end
@@ -60,26 +76,35 @@ module Psych
     # See Psych::Handler#start_document
     def end_document implicit_end = !streaming?
       @last.implicit_end = implicit_end
-      pop
+      n = pop
+      set_end_location(n)
+      n
     end
 
     def start_stream encoding
       @root = Nodes::Stream.new(encoding)
+      set_start_location(@root)
       push @root
     end
 
     def end_stream
-      pop
+      n = pop
+      set_end_location(n)
+      n
     end
 
     def scalar value, anchor, tag, plain, quoted, style
       s = Nodes::Scalar.new(value,anchor,tag,plain,quoted,style)
+      set_location(s)
       @last.children << s
       s
     end
 
     def alias anchor
-      @last.children << Nodes::Alias.new(anchor)
+      a = Nodes::Alias.new(anchor)
+      set_location(a)
+      @last.children << a
+      a
     end
 
     private
@@ -93,5 +118,20 @@ module Psych
       @last = @stack.last
       x
     end
+
+    def set_location(node)
+      set_start_location(node)
+      set_end_location(node)
+    end
+
+    def set_start_location(node)
+      node.start_line   = @start_line
+      node.start_column = @start_column
+    end
+
+    def set_end_location(node)
+      node.end_line   = @end_line
+      node.end_column = @end_column
+    end
   end
 end
diff --git a/ext/psych/lib/psych/versions.rb b/ext/psych/lib/psych/versions.rb
index 34a2c2607b..cf5fc4116e 100644
--- a/ext/psych/lib/psych/versions.rb
+++ b/ext/psych/lib/psych/versions.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 module Psych
   # The version is Psych you're using
-  VERSION = '3.0.0.beta3'
+  VERSION = '3.0.0.beta4'
 
   if RUBY_ENGINE == 'jruby'
     DEFAULT_SNAKEYAML_VERSION = '1.18'.freeze
diff --git a/ext/psych/lib/psych/visitors/yaml_tree.rb b/ext/psych/lib/psych/visitors/yaml_tree.rb
index cfed8f1814..f44e973c52 100644
--- a/ext/psych/lib/psych/visitors/yaml_tree.rb
+++ b/ext/psych/lib/psych/visitors/yaml_tree.rb
@@ -304,7 +304,7 @@ module Psych
           quote = false
         elsif @line_width && o.length > @line_width
           style = Nodes::Scalar::FOLDED
-        elsif o =~ /^[^[:word:]][^"]*$/
+        elsif o =~ /^[^[:word:]][^"]*$/ or o =~ /^([^"]*'+[^"]*)+$/
           style = Nodes::Scalar::DOUBLE_QUOTED
         elsif not String === @ss.tokenize(o) or /\A0[0-7]*[89]/ =~ o
           style = Nodes::Scalar::SINGLE_QUOTED