Merge pull request #979 from mgreter/bugfix/issue_972

Fix reported position when no token can be parsed

Author: mgreter

parser.cpp

@@ -143,6 +143,7 @@ namespace Sass {
       }
       else {
         lex< css_whitespace >();
+        before_token = after_token;
         if (position >= end) break;
         error("invalid top-level expression", pstate);
       }

prelexer.cpp

@@ -62,13 +62,14 @@ namespace Sass {
       return line_comment(src);
     }
 
+    /* not used anymore - remove?
     const char* wspaces(const char* src) {
       return
       alternatives<
         exactly<' '>,
         exactly<'\t'>
       >(src);
-    }
+    }*/
 
     /* not used anymore - remove?
     const char* newline(const char* src) {

prelexer.hpp

@@ -261,7 +261,7 @@ namespace Sass {
     const char* alnums(const char* src);
     const char* puncts(const char* src);
     // Match certain white-space charactes.
-    const char* wspaces(const char* src);
+    // const char* wspaces(const char* src);
     // const char* newline(const char* src);
     // const char* whitespace(const char* src);