STYLE: mark FixedList data(), first(), last() as noexcept

- since a zero-sized FixedList is disallowed, the accessors to the
  first/last elements are always known.

  This allows Pair second() to be noexcept as well (as per Tuple2)

src/OpenFOAM/containers/Lists/FixedList/FixedList.H

@@ -189,24 +189,24 @@ public:
         //- Return a const pointer to the first data element.
         //  Similar to the STL front() method and the string::data() method
         //  This can be used (with caution) when interfacing with C code
-        inline const T* cdata() const;
+        inline const T* cdata() const noexcept;
 
         //- Return a pointer to the first data element.
         //  Similar to the STL front() method and the string::data() method
         //  This can be used (with caution) when interfacing with C code
-        inline T* data();
+        inline T* data() noexcept;
 
         //- The first element of the list, position [0]
-        inline T& first();
+        inline T& first() noexcept;
 
         //- The first element of the list, position [0]
-        inline const T& first() const;
+        inline const T& first() const noexcept;
 
         //- The last element of the list, position [N-1]
-        inline T& last();
+        inline T& last() noexcept;
 
         //- The last element of the list, position [N-1]
-        inline const T& last() const;
+        inline const T& last() const noexcept;
 
 
         //- Return the forward circular index, i.e. next index

src/OpenFOAM/containers/Lists/FixedList/FixedListI.H

@@ -161,7 +161,7 @@ Foam::FixedList<T, N>::clone() const
 
 template<class T, unsigned N>
 inline const T*
-Foam::FixedList<T, N>::cdata() const
+Foam::FixedList<T, N>::cdata() const noexcept
 {
     return v_;
 }
@@ -169,35 +169,35 @@ Foam::FixedList<T, N>::cdata() const
 
 template<class T, unsigned N>
 inline T*
-Foam::FixedList<T, N>::data()
+Foam::FixedList<T, N>::data() noexcept
 {
     return v_;
 }
 
 
 template<class T, unsigned N>
-inline T& Foam::FixedList<T, N>::first()
+inline T& Foam::FixedList<T, N>::first() noexcept
 {
     return v_[0];
 }
 
 
 template<class T, unsigned N>
-inline const T& Foam::FixedList<T, N>::first() const
+inline const T& Foam::FixedList<T, N>::first() const noexcept
 {
     return v_[0];
 }
 
 
 template<class T, unsigned N>
-inline T& Foam::FixedList<T, N>::last()
+inline T& Foam::FixedList<T, N>::last() noexcept
 {
     return v_[N-1];
 }
 
 
 template<class T, unsigned N>
-inline const T& Foam::FixedList<T, N>::last() const
+inline const T& Foam::FixedList<T, N>::last() const noexcept
 {
     return v_[N-1];
 }

src/OpenFOAM/primitives/Pair/Pair.H

@@ -110,10 +110,10 @@ public:
         using FixedList<T, 2>::last;
 
         //- Return second element, which is also the last element
-        inline const T& second() const;
+        inline const T& second() const noexcept;
 
         //- Return second element, which is also the last element
-        inline T& second();
+        inline T& second() noexcept;
 
         //- Return other element
         inline const T& other(const T& a) const;

src/OpenFOAM/primitives/Pair/PairI.H

@@ -117,14 +117,14 @@ inline Foam::Pair<T>::Pair(Istream& is)
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 template<class T>
-inline const T& Foam::Pair<T>::second() const
+inline const T& Foam::Pair<T>::second() const noexcept
 {
     return last();
 }
 
 
 template<class T>
-inline T& Foam::Pair<T>::second()
+inline T& Foam::Pair<T>::second() noexcept
 {
     return last();
 }