ENH: add single-parameter PtrListOps::names (ie, no name filtering)

ENH: adjust fileName component method

- the location \c npos returns the last component

applications/test/fileName/Test-fileName.C

@@ -224,7 +224,8 @@ void testDirname(const fileName& input)
         << "   path:" << input.path()
         << "   name:\"" << input.name() << '"'
         << "   ext:\"" << input.ext()  << '"'
-        << "   components: " << flatOutput(input.components()) << nl;
+        << "   components: " << flatOutput(input.components())
+        << "   last: " << input.component(string::npos) << nl;
 }
 
 

src/OpenFOAM/containers/PtrLists/PtrListOps/PtrListOps.H

@@ -43,6 +43,7 @@ SourceFiles
 #ifndef PtrListOps_H
 #define PtrListOps_H
 
+#include "predicates.H"
 #include "PtrList.H"
 #include "ListOps.H"
 
@@ -169,6 +170,12 @@ List<word> names
 );
 
 
+//- List of names generated by calling \c name() for each list item
+//- no filtering (ie, predicates::always)
+template<class T>
+List<word> names(const UPtrList<T>& list);
+
+
 //- Find first list item with 'name()' that matches, -1 on failure
 template<class T, class UnaryMatchPredicate>
 label firstMatching

src/OpenFOAM/containers/PtrLists/PtrListOps/PtrListOpsTemplates.C

@@ -166,6 +166,16 @@ Foam::List<Foam::word> Foam::PtrListOps::names
 }
 
 
+template<class T>
+Foam::List<Foam::word> Foam::PtrListOps::names
+(
+    const UPtrList<T>& list
+)
+{
+    return PtrListOps::names(list, predicates::always());
+}
+
+
 template<class T, class UnaryMatchPredicate>
 Foam::label Foam::PtrListOps::firstMatching
 (

src/OpenFOAM/primitives/strings/fileName/fileName.C

@@ -485,9 +485,16 @@ Foam::word Foam::fileName::component
 {
     const auto parsed = stringOps::split<string>(*this, delim);
 
-    if (cmpt < parsed.size())
+    if (parsed.size())
     {
-        return parsed[cmpt].str();
+        if (cmpt == std::string::npos)
+        {
+            return parsed.last().str();
+        }
+        else if (cmpt < parsed.size())
+        {
+            return parsed[cmpt].str();
+        }
     }
 
     return word();

src/OpenFOAM/primitives/strings/fileName/fileName.H

@@ -358,7 +358,8 @@ public:
         // \endverbatim
         wordList components(const char delim = '/') const;
 
-        //- Return a single component of the path
+        //- Return a single component of the path or empty if out of range
+        //  The location \c npos returns the last component
         word component(const size_type cmpt, const char delim = '/') const;
 
 

src/meshTools/coordinate/systems/coordinateSystems.C

@@ -269,7 +269,7 @@ Foam::coordinateSystems::lookup(const word& name) const
 
 Foam::wordList Foam::coordinateSystems::names() const
 {
-    return PtrListOps::names(*this, predicates::always{});
+    return PtrListOps::names(*this);  // match any/all
 }