Simplify 0[foo] to *(foo) (fixes #4083)

lib/tokenize.cpp

@@ -1693,6 +1693,15 @@ bool Tokenizer::tokenize(std::istream &code,
         }
     }
 
+    // Simplify: 0[foo] -> *(foo)
+    for (Token* tok = list.front(); tok; tok = tok->next()) {
+        if (Token::simpleMatch(tok, "0 [") && tok->linkAt(1)) {
+            tok->str("*");
+            tok->next()->str("(");
+            tok->linkAt(1)->str(")");
+        }
+    }
+
     // Remove "volatile", "inline", "register", and "restrict"
     simplifyKeyword();
 

test/testtokenize.cpp

@@ -424,6 +424,8 @@ private:
         TEST_CASE(simplifyOperatorName5);
         TEST_CASE(simplifyOperatorName6); // ticket #3194
 
+        TEST_CASE(simplifyNullArray);
+
         // Some simple cleanups of unhandled macros in the global scope
         TEST_CASE(removeMacrosInGlobalScope);
 
@@ -6700,6 +6702,10 @@ private:
         ASSERT_EQUALS(result2, tokenizeAndStringify(code2,false));
     }
 
+    void simplifyNullArray() {
+        ASSERT_EQUALS("* ( foo . bar [ 5 ] ) = x ;", tokenizeAndStringify("0[foo.bar[5]] = x;"));
+    }
+
     void removeMacrosInGlobalScope() {
         // remove some unhandled macros in the global scope.
         ASSERT_EQUALS("void f ( ) { }", tokenizeAndStringify("void f() NOTHROW { }"));