From 8b159d722556a895c132b574dac0fa8e61cab971 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Wed, 6 Jan 2016 10:43:26 -0500
Subject: [PATCH] Lexer: Added ::dequote

---
 src/Lexer.cpp | 19 +++++++++++++++++++
 src/Lexer.h   |  1 +
 2 files changed, 20 insertions(+)

diff --git a/src/Lexer.cpp b/src/Lexer.cpp
index d28807cc..1d96e11b 100644
--- a/src/Lexer.cpp
+++ b/src/Lexer.cpp
@@ -329,6 +329,25 @@ bool Lexer::isPunctuation (int c)
          ! isAlpha (c);
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Assumes that quotes is a string containing a non-trivial set of quote
+// characters.
+std::string Lexer::dequote (const std::string& input, const std::string& quotes)
+{
+  if (input.length ())
+  {
+    int quote = input[0];
+    if (quotes.find (quote) != std::string::npos)
+    {
+      size_t len = input.length ();
+      if (quote == input[len - 1])
+        return input.substr (1, len - 2);
+    }
+  }
+
+  return input;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 bool Lexer::isEOS () const
 {
diff --git a/src/Lexer.h b/src/Lexer.h
index ea122c2a..2504862e 100644
--- a/src/Lexer.h
+++ b/src/Lexer.h
@@ -67,6 +67,7 @@ public:
   static std::string trimLeft                (const std::string& in, const std::string& t = " ");
   static std::string trimRight               (const std::string& in, const std::string& t = " ");
   static std::string trim                    (const std::string& in, const std::string& t = " ");
+  static std::string dequote                 (const std::string&, const std::string& quotes = "'\"");
 
   // Stream Classifiers.
   bool isEOS          () const;