srl_demo.rb in rley-0.5.09

- old
+ new

@@ -1,6 +1,7 @@
 require_relative './lib/parser'
+require_relative './lib/ast_builder'
 
 def print_title(aTitle)
   puts aTitle
   puts '=' * aTitle.size
 end
@@ -26,17 +27,17 @@
 WORK IN PROGRESS
 Simple Regex Language parser:
 - Parses a very limited subset of the language and displays the parse tree
 
 Command-line syntax:
-  ruby #{my_name} "quantifier expression"
+  ruby #{my_name} "SRL expression"
   where:
-    the SRL quantifier expression is enclosed between double quotes (")
+    the SRL expression is enclosed between double quotes (")
 
   Examples:
-  ruby #{my_name} "exactly 4 times"
-  ruby #{my_name} "between 2 and 3 times"
+  ruby #{my_name} "letter from a to f exactly 4 times"
+  ruby #{my_name} "uppercase letter between 2 and 3 times"
 END_MSG
   puts msg
   exit(1)
 end
 puts ARGV[0]
@@ -51,7 +52,16 @@
 
 
 # Generate a concrete syntax parse tree from the parse result
 cst_ptree = result.parse_tree
 print_tree('Concrete Syntax Tree (CST)', cst_ptree)
+
+# Generate a regexp literal representation from the parse result
+tree_builder = ASTBuilder
+ast_ptree = result.parse_tree(tree_builder)
+
+# Now output the regexp literal
+root = ast_ptree.root
+print_title('SRL to Regexp representation:')
+puts "#{ARGV[0]} => #{root.to_str}" # Output the expression result
 
 # End of file