lib/regextest/regex-option.rb in regextest-0.1.5 vs lib/regextest/regex-option.rb in regextest-0.1.6

@@ -86,9 +86,36 @@
   # modify options by integer
   def modify_integer(options)
     @reg_options |= options
   end
       
+  # generate prefix regex
+  def prefix_reg
+    prefix = ""
+    prefix += "i" if is_ignore?
+    prefix += "m" if is_multiline?
+    prefix += "x" if is_extended?
+    
+    if prefix.size > 0
+      "(?#{prefix})"
+    else
+      ""
+    end
+  end
+      
+  # get charset ("a", "u", or "d")
+  def charset
+    case @char_set
+    when TstRegOptDefault
+      "d"
+    when TstRegOptAscii
+      "a"
+    when TstRegOptUnicode
+      "u"
+    else
+      raise "Internal error. Invalid char_set (#{@char_set})"
+    end
+  end
 
   # methods for checking each flag
   def is_ignore?
     (@reg_options & Regexp::IGNORECASE != 0)
   end