Implementing string unquoting.

node.cpp

@@ -83,8 +83,10 @@ namespace Sass {
       buf << string(token) << ":";
       break;
     case values:
-      for (int i = 0; i < children.size(); ++i)
-        buf << " " << string(children[i].token);
+      for (int i = 0; i < children.size(); ++i) {
+        buf << " ";
+        children[i].token.stream_unquoted(buf);
+      }
       break;
     case rule:
       buf << "  ";

test.scss

 $blah: bloo blee;
+$blip: "a 'red' and \"blue\" value";
 
 /* top level comment -- should preserved */
 div {
@@ -21,6 +22,9 @@ div {
     -webkit-box-sizing: $blux;
   }
   margin: 10px 5px;
+  h1 {
+    color: $blip;
+  }
 }
 /* last comment, top level again --
    compare the indentation! */
\ No newline at end of file

token.cpp

@@ -4,4 +4,40 @@ namespace Sass {
   Token::Token() : begin(0), end(0) { }
   Token::Token(const char* _begin, const char* _end)
   : begin(_begin), end(_end) { }
+  
+  void Token::stream_unquoted(std::stringstream& buf) const {
+    const char* p = begin;
+    if (*begin == '\'' || *begin == '"') {
+      ++p;
+      while (p < end) {
+        if (*p == '\\') {
+          switch (*(++p)) {
+            case 'n':  buf << '\n'; break;
+            case 't':  buf << '\t'; break;
+            case 'b':  buf << '\b'; break;
+            case 'r':  buf << '\r'; break;
+            case 'f':  buf << '\f'; break;
+            case 'v':  buf << '\v'; break;
+            case 'a':  buf << '\a'; break;
+            case '\\': buf << '\\'; break;
+            default: buf << *p; break;
+          }
+        }
+        else if (p == end - 1) {
+          return;
+        }
+        else {
+          buf << *p;
+        }
+        ++p;
+      }
+      return;
+    }
+    else {
+      while (p < end) {
+        buf << *(p++);
+      }
+      return;
+    }
+  }
 }
\ No newline at end of file

token.hpp

 #include <string>
+#include <sstream>
 #include "prelexer.hpp"
 
 namespace Sass {
@@ -11,7 +12,14 @@ namespace Sass {
     Token();
     Token(const char* _begin, const char* _end);
 
-    inline bool is_null() { return begin == 0 || end == 0; }
-    inline operator string() const { return string(begin, end - begin); }
+    inline bool is_null() const {
+      return begin == 0 || end == 0 || begin >= end;
+    }
+    inline operator string() const {
+      return string(begin, end - begin);
+    }
+
+    void stream_unquoted(std::stringstream& buf) const;
+    
   };
 }
\ No newline at end of file