Get type from smartpointer (#4608)

* Fix #11223 checkLibraryFunction treats "auto" as type

* Use utility function

* Get type from 'auto p = new ...'

* Fix merge

* Add test for recent fix

* Format

* Get type from smartpointer

lib/token.cpp

@@ -2278,6 +2278,11 @@ std::pair<const Token*, const Token*> Token::typeDecl(const Token * tok)
                 if (vt && vt->containerTypeToken)
                     return { vt->containerTypeToken, vt->containerTypeToken->linkAt(-1) };
             }
+            if (astIsSmartPointer(var->nameToken())) {
+                const ValueType* vt = var->valueType();
+                if (vt && vt->smartPointerTypeToken)
+                    return { vt->smartPointerTypeToken, vt->smartPointerTypeToken->linkAt(-1) };
+            }
         }
         return {var->typeStartToken(), var->typeEndToken()->next()};
     } else if (Token::simpleMatch(tok, "return")) {

test/testfunctions.cpp

@@ -1916,6 +1916,12 @@ private:
               "}\n");
         ASSERT_EQUALS("", errout.str());
 
+        check("void f() {\n"
+              "    auto p = std::make_shared<std::vector<int>>();\n"
+              "    p->push_back(1);\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
+
         settings.severity = severity_old;
         settings.checkLibrary = false;
     }

test/testtokenize.cpp

@@ -6758,6 +6758,8 @@ private:
                                              "void h() { "
                                              "  [func=foo<int>]{func();}(); "
                                              "}"));
+        ASSERT_NO_THROW(tokenizeAndStringify("template <class T> constexpr int n = 1;\n"
+                                             "template <class T> T a[n<T>];\n"));
 
 
         // op op