Fix #784 (Tokenizer: Simplify 2[a] -> a[2])

http://sourceforge.net/apps/trac/cppcheck/ticket/784

src/tokenize.cpp

@@ -1748,6 +1748,17 @@ void Tokenizer::simplifyTokenList()
         }
     }
 
+    // 0[a] -> a[0]
+    for (Token *tok = _tokens; tok; tok = tok->next())
+    {
+        if (Token::Match(tok, "%num% [ %var% ]"))
+        {
+            const std::string temp = tok->str();
+            tok->str(tok->tokAt(2)->str());
+            tok->tokAt(2)->str(temp);
+        }
+    }
+
     simplifySizeof();
 
     // Replace constants..

test/testsimplifytokens.cpp

@@ -124,6 +124,7 @@ private:
         TEST_CASE(simplifyTypedef3)
         TEST_CASE(simplifyTypedef4)
         TEST_CASE(simplifyTypedef5)
+        TEST_CASE(reverseArraySyntax)
     }
 
     std::string tok(const char code[], bool simplify = true)
@@ -1775,6 +1776,10 @@ private:
         ASSERT_EQUALS(expected, tok(code, false));
     }
 
+    void reverseArraySyntax()
+    {
+        ASSERT_EQUALS("a [ 13 ]", tok("13[a]"));
+    }
 };
 
 REGISTER_TEST(TestSimplifyTokens)