From d0e4f4ca10626fd1e9d57fa55a0aae0c890a71ac Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sat, 11 Jul 2015 17:09:29 -0400
Subject: [PATCH] Lexer: Implemented ::decomposePattern

---
 src/Lexer.cpp | 26 ++++++++++++++++++++++++++
 src/Lexer.h   |  1 +
 2 files changed, 27 insertions(+)

diff --git a/src/Lexer.cpp b/src/Lexer.cpp
index 28dbb5d6e..27e18255d 100644
--- a/src/Lexer.cpp
+++ b/src/Lexer.cpp
@@ -1437,3 +1437,29 @@ bool Lexer::decomposeSubstitution (
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// / <pattern> / [<flags>]
+bool Lexer::decomposePattern (
+  const std::string& text,
+  std::string& pattern,
+  std::string& flags)
+{
+  std::string parsed_pattern;
+  std::string::size_type cursor = 0;
+  if (readWord (text, "/", cursor, parsed_pattern) &&
+      parsed_pattern.length ())
+  {
+    std::string parsed_flags = text.substr (cursor);
+    if (parsed_flags.find ("/") == std::string::npos)
+    {
+      dequote (parsed_pattern, "/");
+
+      pattern = parsed_pattern;
+      flags   = parsed_flags;
+      return true;
+    }
+  }
+
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/src/Lexer.h b/src/Lexer.h
index 81e422101..00fec62cb 100644
--- a/src/Lexer.h
+++ b/src/Lexer.h
@@ -80,6 +80,7 @@ public:
   static bool readWord              (const std::string&, std::string::size_type&, std::string&);
   static bool decomposePair         (const std::string&, std::string&, std::string&, std::string&, std::string&);
   static bool decomposeSubstitution (const std::string&, std::string&, std::string&, std::string&);
+  static bool decomposePattern      (const std::string&, std::string&, std::string&);
   static int hexToInt               (int);
   static int hexToInt               (int, int);
   static int hexToInt               (int, int, int, int);