precedence.rb in antelope-0.2.2

- old
+ new
@@ -1,61 +1,61 @@
-# encoding: utf-8
-
-module Antelope
-  module Ace
-
-    # Defines a precedence.  A precedence has a type, tokens, and a
-    # level.
-    class Precedence < Struct.new(:type, :tokens, :level)
-
-      # @!attribute [rw] type
-      #   The type of precedence level.  This should be one of
-      #   `:left`, `:right`, or `:nonassoc`.
-      #
-      #   @return [Symbol] the type.
-      # @!attribute [rw] tokens
-      #   An set of tokens that are on this specific precedence
-      #   level.  The tokens are identified as symbols.  The special
-      #   symbol, `:_`, represents any token.
-      #
-      #   @return [Set<Symbol>] the tokens on this level.
-      # @!attribute [rw] level
-      #   The level we're on.  The higher the level, the higher the
-      #   precedence.
-
-      include Comparable
-
-      # Compares the other object to this object.  If the other object
-      # isn't a {Precedence}, it returns nil.  If the other
-      # precedence isn't on the same level as this one, then the
-      # levels are compared and the result of that is returned.  If
-      # it is, however, the type is checked; if this precedence is
-      # left associative, then it returns 1 (it is greater than the
-      # other); if this precedence is right associative, then it
-      # returns -1 (it is less than the other); if this precedence is
-      # nonassociative, it returns 0 (it is equal to the other).
-      #
-      # @param other [Object] the object to compare to this one.
-      # @return [Numeric?]
-      def <=>(other)
-        return nil unless other.is_a? Precedence
-        if level != other.level
-          level <=> other.level
-        elsif type == :left
-          1
-        elsif type == :right
-          -1
-        else
-          0
-        end
-      end
-
-      # Converts the precedence into a representative string, denoting
-      # the type and the level.
-      #
-      # @return [String]
-      def to_s
-        "#{type.to_s[0]}#{level}"
-      end
-    end
-  end
-end
+# encoding: utf-8
+
+module Antelope
+  module Ace
+
+    # Defines a precedence.  A precedence has a type, tokens, and a
+    # level.
+    class Precedence < Struct.new(:type, :tokens, :level)
+
+      # @!attribute [rw] type
+      #   The type of precedence level.  This should be one of
+      #   `:left`, `:right`, or `:nonassoc`.
+      #
+      #   @return [Symbol] the type.
+      # @!attribute [rw] tokens
+      #   An set of tokens that are on this specific precedence
+      #   level.  The tokens are identified as symbols.  The special
+      #   symbol, `:_`, represents any token.
+      #
+      #   @return [Set<Symbol>] the tokens on this level.
+      # @!attribute [rw] level
+      #   The level we're on.  The higher the level, the higher the
+      #   precedence.
+
+      include Comparable
+
+      # Compares the other object to this object.  If the other object
+      # isn't a {Precedence}, it returns nil.  If the other
+      # precedence isn't on the same level as this one, then the
+      # levels are compared and the result of that is returned.  If
+      # it is, however, the type is checked; if this precedence is
+      # left associative, then it returns 1 (it is greater than the
+      # other); if this precedence is right associative, then it
+      # returns -1 (it is less than the other); if this precedence is
+      # nonassociative, it returns 0 (it is equal to the other).
+      #
+      # @param other [Object] the object to compare to this one.
+      # @return [Numeric?]
+      def <=>(other)
+        return nil unless other.is_a? Precedence
+        if level != other.level
+          level <=> other.level
+        elsif type == :left
+          1
+        elsif type == :right
+          -1
+        else
+          0
+        end
+      end
+
+      # Converts the precedence into a representative string, denoting
+      # the type and the level.
+      #
+      # @return [String]
+      def to_s
+        "#{type.to_s[0]}#{level}"
+      end
+    end
+  end
+end