Fix #750 (cppcheck wants variable outside do-loop to be only inside loop)

http://sourceforge.net/apps/trac/cppcheck/ticket/750
Fix #758 (False positive on variable scope with boost foreach)
http://sourceforge.net/apps/trac/cppcheck/ticket/758

src/checkother.cpp

@@ -644,8 +644,19 @@ void CheckOther::lookupVar(const Token *tok1, const char varname[])
 
         else if (indentlevel == 0)
         {
-            if ((tok->str() == "for") || (tok->str() == "while"))
+            // %unknown% ( %any% ) {
+            // If %unknown% is anything except if, we assume
+            // that it is a for or while loop or a macro hiding either one
+            if (Token::simpleMatch(tok->next(), "(") &&
+                Token::simpleMatch(tok->next()->link()->next(), "{"))
+            {
+                if (tok->str() != "if")
+                    for_or_while = true;
+            }
+
+            if (Token::simpleMatch(tok, "do {"))
                 for_or_while = true;
+
             if (parlevel == 0 && (tok->str() == ";"))
                 for_or_while = false;
         }

test/testother.cpp

@@ -517,10 +517,20 @@ private:
 
     void varScope5()
     {
-        varScope("void f()\n"
+        varScope("void f(int x)\n"
                  "{\n"
                  "    int i = 0;\n"
-                 "    if (true) {\n"
+                 "    if (x) {\n"
+                 "        for ( ; i < 10; ++i) ;\n"
+                 "    }\n"
+                 "}\n");
+        ASSERT_EQUALS("[test.cpp:3]: (style) The scope of the variable i can be limited\n", errout.str());
+
+        varScope("void f(int x)\n"
+                 "{\n"
+                 "    int i = 0;\n"
+                 "    if (x) {b()}\n"
+                 "    else {\n"
                  "        for ( ; i < 10; ++i) ;\n"
                  "    }\n"
                  "}\n");
@@ -540,10 +550,34 @@ private:
                  "    }\n"
                  "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        varScope("void f()\n"
+                 "{\n"
+                 "int foo = 0;\n"
+                 "std::vector<int> vec(10);\n"
+                 "BOOST_FOREACH(int& i, vec)\n"
+                 "{\n"
+                 " foo += 1;\n"
+                 " if(foo == 10)\n"
+                 " {\n"
+                 "  return 0;\n"
+                 " }\n"
+                 "}\n"
+                 "}\n");
+        ASSERT_EQUALS("", errout.str());
+
+        varScope("void f(int &x)\n"
+                 "{\n"
+                 "  int n = 1;\n"
+                 "  do\n"
+                 "  {\n"
+                 "    ++n;\n"
+                 "    ++x;\n"
+                 "  } while (x);\n"
+                 "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
-
-
     void checkNullPointer(const char code[])
     {
         // Tokenize..