base_text.rb in sequitur-0.1.11

- old
+ new
@@ -1,95 +1,95 @@
-require_relative 'base_formatter'
-
-module Sequitur
-  module Formatter
-
-    # A formatter class that can render a dynamic grammar in plain text.
-    # @example
-    #   some_grammar = ... # Points to a DynamicGrammar-like object
-    #   # Output the result to the standard console output
-    #   formatter = Sequitur::Formatter::BaseText.new(STDOUT)
-    #   # Render the grammar (through a visitor)
-    #   formatter.run(some_grammar.visitor)
-    class BaseText < BaseFormatter
-
-      # Constructor.
-      # @param anIO [IO] The output stream to which the rendered grammar
-      # is written.
-      def initialize(anIO)
-        super(anIO)
-        @prod_lookup = {}
-      end
-
-      public
-
-      # Method called by a GrammarVisitor to which the formatter subscribed.
-      # Notification of a visit event: the visitor is about to visit a grammar
-      # @param aGrammar [DynamicGrammar-like object]
-      def before_grammar(aGrammar)
-        aGrammar.productions.each_with_index do |a_prod, index|
-          prod_lookup[a_prod] = index
-        end
-      end
-
-      # Method called by a GrammarVisitor to which the formatter subscribed.
-      # Notification of a visit event: the visitor is about to visit 
-      # a production
-      # @param aProduction [aProduction]
-      def before_production(aProduction)
-        p_name = prod_name(aProduction)
-        output.print p_name
-      end
-
-      # Method called by a GrammarVisitor to which the formatter subscribed.
-      # Notification of a visit event: the visitor is about to visit 
-      # the rhs of a production
-      # @param _ [Array]
-      def before_rhs(_)
-        output.print ' :'
-      end
-
-      # Method called by a GrammarVisitor to which the formatter subscribed.
-      # Notification of a visit event: the visitor is about to visit 
-      # a terminal symbol from the rhs of a production
-      # @param aSymbol [Object]
-      def before_terminal(aSymbol)
-        output.print " #{aSymbol}"
-      end
-
-      # Method called by a GrammarVisitor to which the formatter subscribed.
-      # Notification of a visit event: the visitor is about to visit 
-      # a non-terminal (= an allusion to a production) in the rhs of a 
-      # production
-      # @param aProduction [Production] a production occurring in the rhs
-      def before_non_terminal(aProduction)
-        p_name = prod_name(aProduction)
-        output.print " #{p_name}"
-      end
-
-      # Method called by a GrammarVisitor to which the formatter subscribed.
-      # Notification of a visit event: the visitor complete the visit 
-      # of a production
-      def after_production(_)
-        output.print ".\n"
-      end
-
-      private
-      
-      # Read accessor of the production lookup
-      def prod_lookup()
-        return @prod_lookup
-      end
-
-      # Generate a name of a given production.
-      # @param aProduction [Production] 
-      def prod_name(aProduction)
-        prod_index = prod_lookup[aProduction]
-        name = (prod_index == 0) ? 'start' : "P#{prod_index}"
-        return name
-      end
-
-    end # class
-  end # module
-end # module
-
-# End of file
+require_relative 'base_formatter'
+
+module Sequitur
+  module Formatter
+
+    # A formatter class that can render a dynamic grammar in plain text.
+    # @example
+    #   some_grammar = ... # Points to a DynamicGrammar-like object
+    #   # Output the result to the standard console output
+    #   formatter = Sequitur::Formatter::BaseText.new(STDOUT)
+    #   # Render the grammar (through a visitor)
+    #   formatter.run(some_grammar.visitor)
+    class BaseText < BaseFormatter
+
+      # Constructor.
+      # @param anIO [IO] The output stream to which the rendered grammar
+      # is written.
+      def initialize(anIO)
+        super(anIO)
+        @prod_lookup = {}
+      end
+
+      public
+
+      # Method called by a GrammarVisitor to which the formatter subscribed.
+      # Notification of a visit event: the visitor is about to visit a grammar
+      # @param aGrammar [DynamicGrammar-like object]
+      def before_grammar(aGrammar)
+        aGrammar.productions.each_with_index do |a_prod, index|
+          prod_lookup[a_prod] = index
+        end
+      end
+
+      # Method called by a GrammarVisitor to which the formatter subscribed.
+      # Notification of a visit event: the visitor is about to visit
+      # a production
+      # @param aProduction [aProduction]
+      def before_production(aProduction)
+        p_name = prod_name(aProduction)
+        output.print p_name
+      end
+
+      # Method called by a GrammarVisitor to which the formatter subscribed.
+      # Notification of a visit event: the visitor is about to visit
+      # the rhs of a production
+      # @param _ [Array]
+      def before_rhs(_)
+        output.print ' :'
+      end
+
+      # Method called by a GrammarVisitor to which the formatter subscribed.
+      # Notification of a visit event: the visitor is about to visit
+      # a terminal symbol from the rhs of a production
+      # @param aSymbol [Object]
+      def before_terminal(aSymbol)
+        output.print " #{aSymbol}"
+      end
+
+      # Method called by a GrammarVisitor to which the formatter subscribed.
+      # Notification of a visit event: the visitor is about to visit
+      # a non-terminal (= an allusion to a production) in the rhs of a
+      # production
+      # @param aProduction [Production] a production occurring in the rhs
+      def before_non_terminal(aProduction)
+        p_name = prod_name(aProduction)
+        output.print " #{p_name}"
+      end
+
+      # Method called by a GrammarVisitor to which the formatter subscribed.
+      # Notification of a visit event: the visitor complete the visit
+      # of a production
+      def after_production(_)
+        output.print ".\n"
+      end
+
+      private
+
+      # Read accessor of the production lookup
+      def prod_lookup()
+        return @prod_lookup
+      end
+
+      # Generate a name of a given production.
+      # @param aProduction [Production]
+      def prod_name(aProduction)
+        prod_index = prod_lookup[aProduction]
+        name = (prod_index == 0) ? 'start' : "P#{prod_index}"
+        return name
+      end
+
+    end # class
+  end # module
+end # module
+
+# End of file