C++: respond to more PR comments

cpp/ql/src/Security/CWE/CWE-022/TaintedPath.ql

@@ -34,10 +34,10 @@ class FileFunction extends FunctionWithWrappers {
       nme.matches("CreateFile%")
     )
     or
-    this.hasStdName("fopen")
+    this.hasQualifiedName("std", "fopen")
     or
     // on any of the fstream classes, or filebuf
-    exists(string nme | this.getDeclaringType().hasStdName(nme) |
+    exists(string nme | this.getDeclaringType().hasQualifiedName("std", nme) |
       nme = "basic_fstream" or
       nme = "basic_ifstream" or
       nme = "basic_ofstream" or

cpp/ql/src/semmle/code/cpp/Declaration.qll

@@ -119,17 +119,11 @@ abstract class Declaration extends Locatable, @declaration {
   /** Holds if this declaration has the given name in the global namespace. */
   predicate hasGlobalName(string name) { this.hasQualifiedName("", "", name) }
 
-
-  /** Holds if this declaration has the given name in the `std` namespace. */
-  predicate hasStdName(string name) {
-    this.hasQualifiedName("std", "", name)
-  }
-
   /** Holds if this declaration has the given name in the global namespace or the `std` namespace. */
   predicate hasGlobalOrStdName(string name) {
     this.hasGlobalName(name)
     or
-    this.hasStdName(name)
+    this.hasQualifiedName("std", "", name)
   }
 
   /** Gets a specifier of this declaration. */

cpp/ql/src/semmle/code/cpp/commons/File.qll

@@ -6,7 +6,7 @@ import cpp
 predicate fopenCall(FunctionCall fc) {
   exists(Function f | f = fc.getTarget() |
     f.hasGlobalOrStdName("fopen") or
-    f.hasGlobalOrStdName("open") or
+    f.hasGlobalName("open") or
     f.hasGlobalName("_open") or
     f.hasGlobalName("_wopen") or
     f.hasGlobalName("CreateFile") or