ENH: generalize instant to be templated, movable, etc

- allows reuse for other purposes

applications/test/instant/Make/files

+Test-instant.C
+
+EXE = $(FOAM_USER_APPBIN)/Test-instant

applications/test/instant/Make/options

+/* EXE_INC = -I$(LIB_SRC)/cfdTools/include */
+/* EXE_LIBS = -lfiniteVolume */

applications/test/instant/Test-instant.C

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Description
+    Test instant, fileNameInstant
+
+\*---------------------------------------------------------------------------*/
+
+#include "argList.H"
+#include "instant.H"
+#include "fileNameInstant.H"
+#include "DynamicList.H"
+
+using namespace Foam;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// Main program:
+
+int main(int argc, char *argv[])
+{
+    DynamicList<instant> times;
+
+    times.append(instant{});
+    times.append({12, "abc"});
+    times.append(instant{3.14159});
+    times.append({300.456, "def"});
+    times.append({454.456, "xyz"});
+    times.append({10, "ten"});
+
+    {
+        word timeName("twenty");
+
+        Info<<"move append: " << timeName << nl;
+        times.append({20, std::move(timeName)});
+        Info<<"after append: " << timeName << nl;
+    }
+
+    Info<< nl << "times:" << times << nl;
+    sort(times);
+    Info<< "Sorted:" << times << nl;
+
+
+    DynamicList<fileNameInstant> files;
+    files.append(fileNameInstant{});
+    files.append({12, "twelve"});
+    files.append({3.14, "/path/almost-pi"});
+    files.append({300, "/dev/value"});
+    files.append({454, "/tmp/xyz"});
+    files.append({10, "ten"});
+
+    Info<< nl << "files:" << files << nl;
+    sort(files);
+    Info<< "Sorted:" << files << nl;
+
+
+    Info<< "\nEnd\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //

src/OpenFOAM/db/Time/instant/Instant.C

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "Instant.H"
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+template<class T>
+Foam::Instant<T>::Instant()
+:
+    val_(0),
+    key_()
+{}
+
+
+template<class T>
+Foam::Instant<T>::Instant::Instant(scalar val, const T& key)
+:
+    val_(val),
+    key_(key)
+{}
+
+
+template<class T>
+Foam::Instant<T>::Instant::Instant(scalar val, T&& key)
+:
+    val_(val),
+    key_(std::move(key))
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class T>
+bool Foam::Instant<T>::equal(scalar val) const
+{
+    return ((val_ > val - SMALL) && (val_ < val + SMALL));
+}
+
+
+template<class T>
+template<class T2>
+bool Foam::Instant<T>::equal(const Instant<T2>& other) const
+{
+    return this->equal(other.value());
+}
+
+
+// * * * * * * * * * * * * * * * Global Operators  * * * * * * * * * * * * * //
+
+template<class T1, class T2>
+bool Foam::operator==(const Instant<T1>& a, const Instant<T2>& b)
+{
+    return a.equal(b.value());
+}
+
+
+template<class T1, class T2>
+bool Foam::operator!=(const Instant<T1>& a, const Instant<T2>& b)
+{
+    return !a.equal(b.value());
+}
+
+
+template<class T1, class T2>
+bool Foam::operator<(const Instant<T1>& a, const Instant<T2>& b)
+{
+    return a.value() < b.value();
+}
+
+
+template<class T1, class T2>
+bool Foam::operator>(const Instant<T1>& a, const Instant<T2>& b)
+{
+    return a.value() > b.value();
+}
+
+
+// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
+
+template<class T>
+Foam::Istream& Foam::operator>>(Istream& is, Instant<T>& inst)
+{
+    is >> inst.value() >> inst.name();
+    return is;
+}
+
+
+template<class T>
+Foam::Ostream& Foam::operator<<(Ostream& os, const Instant<T>& inst)
+{
+    os << inst.value() << '\t' << inst.name();
+    return os;
+}
+
+
+// ************************************************************************* //

src/OpenFOAM/db/Time/instant/Instant.H

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::Instant
+
+Description
+    A tuple of value and key.
+    The value often corresponds to a time value, thus the naming of the class.
+    The key will usually be a time name or a file name etc.
+
+SourceFiles
+    Instant.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef Instant_H
+#define Instant_H
+
+#include "scalar.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class Instant Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class T>
+class Instant
+{
+    // Private Data
+
+        //- The value (eg, time)
+        scalar val_;
+
+        //- The name/key
+        T key_;
+
+
+public:
+
+    // Public classes
+
+        //- Less function for sorting
+        struct less
+        {
+            bool operator()(const Instant& a, const Instant& b) const
+            {
+                return a.value() < b.value();
+            }
+        };
+
+
+    // Constructors
+
+        //- Construct null, with value = 0.
+        Instant();
+
+        //- Copy construct from components
+        Instant(scalar val, const T& key);
+
+        //- Move construct from components
+        Instant(scalar val, T&& key);
+
+        //- Copy construct
+        Instant(const Instant&) = default;
+
+        //- Move construct
+        Instant(Instant&&) = default;
+
+
+    // Member Functions
+
+        //- The value (const access)
+        scalar value() const
+        {
+            return val_;
+        }
+
+        //- The value (non-const access)
+        scalar& value()
+        {
+            return val_;
+        }
+
+        //- The name/key (const access)
+        const T& name() const
+        {
+            return key_;
+        }
+
+        //- The name/key (non-const access)
+        T& name()
+        {
+            return key_;
+        }
+
+        //- True if values are equal (includes SMALL for rounding)
+        bool equal(scalar val) const;
+
+        //- True if values are equal (includes SMALL for rounding)
+        template<class T2>
+        bool equal(const Instant<T2>& other) const;
+
+
+    // Operators
+
+        //- Copy assignment
+        Instant& operator=(const Instant&) = default;
+
+        //- Move assignment
+        Instant& operator=(Instant&&) = default;
+};
+
+
+// IOstream Operators
+
+template<class T> Istream& operator>>(Istream& is, Instant<T>& inst);
+template<class T> Ostream& operator<<(Ostream& os, const Instant<T>& inst);
+
+
+// Global Operators
+
+//- Compare instant values for equality
+template<class T1, class T2>
+bool operator==(const Instant<T1>& a, const Instant<T2>& b);
+
+//- Compare instant values for inequality
+template<class T1, class T2>
+bool operator!=(const Instant<T1>& a, const Instant<T2>& b);
+
+//- Compare instant values for less-than
+template<class T1, class T2>
+bool operator<(const Instant<T1>& a, const Instant<T2>& b);
+
+//- Compare instant values for greater-than
+template<class T1, class T2>
+bool operator>(const Instant<T1>& a, const Instant<T2>& b);
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+    #include "Instant.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/OpenFOAM/db/Time/instant/fileNameInstant.H

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Typedef
+    Foam::fileNameInstant
+
+Description
+    A tuple of value and fileName.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fileNameInstant_H
+#define fileNameInstant_H
+
+#include "fileName.H"
+#include "Instant.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    typedef Instant<fileName> fileNameInstant;
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/OpenFOAM/db/Time/instant/instant.C

@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2018 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -23,8 +23,9 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#include "instantList.H"
+#include "instant.H"
 #include "Time.H"
+#include <cstdlib>
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
@@ -33,81 +34,22 @@ const char* const Foam::instant::typeName = "instant";
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::instant::instant()
-{}
-
-
-Foam::instant::instant(const scalar val, const word& tname)
+Foam::instant::instant(scalar timeValue)
 :
-    value_(val),
-    name_(tname)
+    Instant<word>(timeValue, Time::timeName(timeValue))
 {}
 
 
-Foam::instant::instant(const scalar val)
+Foam::instant::instant(const word& timeName)
 :
-    value_(val),
-    name_(Time::timeName(val))
+    Instant<word>(std::atof(timeName.c_str()), timeName)
 {}
 
 
-Foam::instant::instant(const word& tname)
+Foam::instant::instant(word&& timeName)
 :
-    value_(atof(tname.c_str())),
-    name_(tname)
+    Instant<word>(std::atof(timeName.c_str()), std::move(timeName))
 {}
 
 
-// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
-
-bool Foam::instant::equal(const scalar val) const
-{
-    return ((value_ > val - SMALL) && (value_ < val + SMALL));
-}
-
-
-// * * * * * * * * * * * * * * * Global Operators  * * * * * * * * * * * * * //
-
-bool Foam::operator==(const instant& a, const instant& b)
-{
-    return a.equal(b.value());
-}
-
-
-bool Foam::operator!=(const instant& a, const instant& b)
-{
-    return !a.equal(b.value());
-}
-
-
-bool Foam::operator<(const instant& a, const instant& b)
-{
-    return a.value() < b.value();
-}
-
-
-bool Foam::operator>(const instant& a, const instant& b)
-{
-    return a.value() > b.value();
-}
-
-
-// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
-
-Foam::Istream& Foam::operator>>(Istream& is, instant& inst)
-{
-    is >> inst.value_ >> inst.name_;
-
-    return is;
-}
-
-
-Foam::Ostream& Foam::operator<<(Ostream& os, const instant& inst)
-{
-   os << inst.value() << tab << inst.name();
-
-   return os;
-}
-
-
 // ************************************************************************* //

src/OpenFOAM/db/Time/instant/instant.H

@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2018 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -36,113 +36,62 @@ SourceFiles
 #define instant_H
 
 #include "word.H"
-#include "scalar.H"
+#include "Instant.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 namespace Foam
 {
 
-// Forward declarations
-class instant;
-
-Istream& operator>>(Istream& is, instant& inst);
-Ostream& operator<<(Ostream& os, const instant& inst);
-
-
 /*---------------------------------------------------------------------------*\
                            Class instant Declaration
 \*---------------------------------------------------------------------------*/
 
 class instant
+:
+    public Instant<word>
 {
-    // Private data
-
-        scalar value_;
-
-        word name_;
-
 public:
 
-    // Public classes
-
-        //- Less function class used in sorting instants
-        class less
-        {
-        public:
-
-            bool operator()(const instant& a, const instant& b) const
-            {
-                return a.value() < b.value();
-            }
-        };
-
-
-    // Static data members
+    // Static Data Members
 
         static const char* const typeName;
 
 
     // Constructors
 
-        //- Construct null
-        instant();
-
-        //- Construct from components
-        instant(const scalar val, const word& tname);
-
-        //- Construct from time value
-        explicit instant(const scalar val);
+        //- Copy and move construct from components