use = default to create default constructor

alib2data/src/regexp/formal/FormalRegExpEmpty.h

@@ -52,7 +52,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the empty node.
 	 */
-	explicit FormalRegExpEmpty ( );
+	explicit FormalRegExpEmpty ( ) = default;
 	/**
 	 * @copydoc FormalRegExpElement::clone ( ) const &
@@ -126,11 +126,6 @@ public:
 namespace regexp {
-template < class SymbolType >
-FormalRegExpEmpty < SymbolType >::FormalRegExpEmpty ( ) {
-	// so that default constructor is available
-}
-
 template < class SymbolType >
 FormalRegExpEmpty < SymbolType > * FormalRegExpEmpty < SymbolType >::clone ( ) const & {
 	return new FormalRegExpEmpty ( * this );

alib2data/src/regexp/formal/FormalRegExpEpsilon.h

@@ -52,7 +52,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the epsilon node.
 	 */
-	explicit FormalRegExpEpsilon ( );
+	explicit FormalRegExpEpsilon ( ) = default;
 	/**
 	 * @copydoc FormalRegExpElement::clone ( ) const &
@@ -126,11 +126,6 @@ public:
 namespace regexp {
-template < class SymbolType >
-FormalRegExpEpsilon < SymbolType >::FormalRegExpEpsilon ( ) {
-	// so that default constructor is available
-}
-
 template < class SymbolType >
 FormalRegExpEpsilon < SymbolType > * FormalRegExpEpsilon < SymbolType >::clone ( ) const & {
 	return new FormalRegExpEpsilon ( * this );

alib2data/src/regexp/unbounded/UnboundedRegExpAlternation.h

@@ -62,7 +62,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the alternation node. By default it is semantically equivalent to empty regular expression.
 	 */
-	explicit UnboundedRegExpAlternation ( );
+	explicit UnboundedRegExpAlternation ( ) = default;
 	/**
 	 * @copydoc UnboundedRegExpElement::clone ( ) const &
@@ -170,10 +170,6 @@ public:
 namespace regexp {
-template < class SymbolType >
-UnboundedRegExpAlternation < SymbolType >::UnboundedRegExpAlternation ( ) {
-}
-
 template < class SymbolType >
 const ext::ptr_vector < UnboundedRegExpElement < SymbolType > > & UnboundedRegExpAlternation < SymbolType >::getElements ( ) const {
 	return this->getChildren();

alib2data/src/regexp/unbounded/UnboundedRegExpConcatenation.h

@@ -62,7 +62,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the concatenation node. By default it is semantically equivalent to epsilon.
 	 */
-	explicit UnboundedRegExpConcatenation ( );
+	explicit UnboundedRegExpConcatenation ( ) = default;
 	/**
 	 * @copydoc UnboundedRegExpElement::clone ( ) const &
@@ -170,10 +170,6 @@ public:
 namespace regexp {
-template < class SymbolType >
-UnboundedRegExpConcatenation < SymbolType >::UnboundedRegExpConcatenation ( ) {
-}
-
 template < class SymbolType >
 const ext::ptr_vector < UnboundedRegExpElement < SymbolType > > & UnboundedRegExpConcatenation < SymbolType >::getElements ( ) const {
 	return this->getChildren();

alib2data/src/regexp/unbounded/UnboundedRegExpEmpty.h

@@ -59,7 +59,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the empty node.
 	 */
-	explicit UnboundedRegExpEmpty ( );
+	explicit UnboundedRegExpEmpty ( ) = default;
 	/**
 	 * @copydoc UnboundedRegExpElement::clone ( ) const &
@@ -133,11 +133,6 @@ public:
 namespace regexp {
-template < class SymbolType >
-UnboundedRegExpEmpty < SymbolType >::UnboundedRegExpEmpty ( ) {
-	// so that default constructor is available
-}
-
 template < class SymbolType >
 UnboundedRegExpEmpty < SymbolType > * UnboundedRegExpEmpty < SymbolType >::clone ( ) const & {
 	return new UnboundedRegExpEmpty ( * this );

alib2data/src/regexp/unbounded/UnboundedRegExpEpsilon.h

@@ -59,7 +59,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the epsilon node.
 	 */
-	explicit UnboundedRegExpEpsilon ( );
+	explicit UnboundedRegExpEpsilon ( ) = default;
 	/**
 	 * @copydoc UnboundedRegExpElement::clone ( ) const &
@@ -133,11 +133,6 @@ public:
 namespace regexp {
-template < class SymbolType >
-UnboundedRegExpEpsilon < SymbolType >::UnboundedRegExpEpsilon ( ) {
-	// so that default constructor is available
-}
-
 template < class SymbolType >
 UnboundedRegExpEpsilon < SymbolType > * UnboundedRegExpEpsilon < SymbolType >::clone ( ) const & {
 	return new UnboundedRegExpEpsilon ( * this );

alib2data/src/rte/formal/FormalRTEEmpty.h

@@ -59,7 +59,7 @@ public:
 	/**
 	 * \brief Creates a new instance of the empty node.
 	 */
-	explicit FormalRTEEmpty ( );
+	explicit FormalRTEEmpty ( ) = default;
 	/**
 	 * @copydoc FormalRTEElement < SymbolType, RankType >::clone ( ) const &
@@ -122,11 +122,6 @@ public:
 	}
 };
-template < class SymbolType, class RankType >
-FormalRTEEmpty < SymbolType, RankType >::FormalRTEEmpty ( ) {
-	// so that default constructor is available
-}
-
 template < class SymbolType, class RankType >
 FormalRTEEmpty < SymbolType, RankType > * FormalRTEEmpty < SymbolType, RankType >::clone ( ) const & {
 	return new FormalRTEEmpty ( * this );