Fix #14424 FP constStatement when using declaration matches variable name (#8150)

Author: chrchr-github

lib/tokenize.cpp

@@ -2697,6 +2697,9 @@ namespace {
             return false;
         }
 
+        if (tok1->tokAt(-1)->tokType() == Token::eType || tok1->tokAt(-1)->tokType() == Token::eName)
+            return false;
+
         if (Token::Match(tok1->tokAt(-1), "class|struct|union|enum|namespace")) {
             // fixme
             return false;

test/testsimplifyusing.cpp

@@ -74,6 +74,7 @@ class TestSimplifyUsing : public TestFixture {
         TEST_CASE(simplifyUsing35);
         TEST_CASE(simplifyUsing36);
         TEST_CASE(simplifyUsing37);
+        TEST_CASE(simplifyUsing38);
 
         TEST_CASE(simplifyUsing8970);
         TEST_CASE(simplifyUsing8971);
@@ -914,6 +915,16 @@ class TestSimplifyUsing : public TestFixture {
         ASSERT_EQUALS("", errout_str());
     }
 
+    void simplifyUsing38() {
+        const char code[] = "using std::begin;\n" // #14424
+                            "using std::end;\n"
+                            "Unknown begin;\n"
+                            "int end;\n";
+        const char expected[] = "Unknown begin ; int end ;";
+        ASSERT_EQUALS(expected, tok(code));
+        ASSERT_EQUALS("", errout_str());
+    }
+
     void simplifyUsing8970() {
         const char code[] = "using V = std::vector<int>;\n"
                             "struct A {\n"