Index: src/Parser/parser.yy
===================================================================
--- src/Parser/parser.yy	(revision 79a6b17df320e9fc468e5e5592e1cee2fcf2b5e3)
+++ src/Parser/parser.yy	(revision a5f94448b8a60812f486f91db490a2a14fcca947)
@@ -10,6 +10,6 @@
 // Created On       : Sat Sep  1 20:22:55 2001
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Mon Jan 30 18:59:23 2023
-// Update Count     : 5856
+// Last Modified On : Mon Jan 30 19:19:22 2023
+// Update Count     : 5858
 //
 
@@ -1645,7 +1645,7 @@
 exception_statement:
 	TRY compound_statement handler_clause 					%prec THEN
-		{ $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
+		{ $$ = new StatementNode( build_try( $2, $3, nullptr ) ); }
 	| TRY compound_statement finally_clause
-		{ $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
+		{ $$ = new StatementNode( build_try( $2, nullptr, $3 ) ); }
 	| TRY compound_statement handler_clause finally_clause
 		{ $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
@@ -1699,5 +1699,5 @@
 asm_statement:
 	ASM asm_volatile_opt '(' string_literal ')' ';'
-		{ $$ = new StatementNode( build_asm( $2, $4, 0 ) ); }
+		{ $$ = new StatementNode( build_asm( $2, $4, nullptr ) ); }
 	| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
 		{ $$ = new StatementNode( build_asm( $2, $4, $6 ) ); }
@@ -1707,5 +1707,5 @@
 		{ $$ = new StatementNode( build_asm( $2, $4, $6, $8, $10 ) ); }
 	| ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
-		{ $$ = new StatementNode( build_asm( $2, $5, 0, $8, $10, $12 ) ); }
+		{ $$ = new StatementNode( build_asm( $2, $5, nullptr, $8, $10, $12 ) ); }
 	;
 
@@ -1880,15 +1880,15 @@
 //	'[' ']' identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' // S/R conflict
 //		{
-//			$$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
+//			$$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, nullptr, true );
 //		}
 //	'[' ']' identifier '(' push cfa_parameter_ellipsis_list_opt pop ')'
 //		{
 //			typedefTable.setNextIdentifier( *$5 );
-//			$$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
+//			$$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, nullptr, true );
 //		}
 //	| '[' ']' TYPEDEFname '(' push cfa_parameter_ellipsis_list_opt pop ')'
 //		{
 //			typedefTable.setNextIdentifier( *$5 );
-//			$$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
+//			$$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, nullptr, true );
 //		}
 //	| '[' ']' typegen_name
@@ -1902,7 +1902,7 @@
 	cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
 		// To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
-		{ $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
+		{ $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
 	| cfa_function_return identifier_or_type_name '(' push cfa_parameter_ellipsis_list_opt pop ')' attribute_list_opt
-		{ $$ = DeclarationNode::newFunction( $2, $1, $5, 0 )->addQualifiers( $8 ); }
+		{ $$ = DeclarationNode::newFunction( $2, $1, $5, nullptr )->addQualifiers( $8 ); }
 	;
 
@@ -2626,7 +2626,7 @@
 enum_type_nobody:										// enum - {...}
 	ENUM attribute_list_opt identifier
-		{ typedefTable.makeTypedef( *$3 ); $$ = DeclarationNode::newEnum( $3, 0, false, false )->addQualifiers( $2 ); }
+		{ typedefTable.makeTypedef( *$3 ); $$ = DeclarationNode::newEnum( $3, nullptr, false, false )->addQualifiers( $2 ); }
 	| ENUM attribute_list_opt type_name
-		{ typedefTable.makeTypedef( *$3->type->symbolic.name );	$$ = DeclarationNode::newEnum( $3->type->symbolic.name, 0, false, false )->addQualifiers( $2 ); }
+		{ typedefTable.makeTypedef( *$3->type->symbolic.name );	$$ = DeclarationNode::newEnum( $3->type->symbolic.name, nullptr, false, false )->addQualifiers( $2 ); }
 	;
 
@@ -2967,5 +2967,5 @@
 		{
 			typedefTable.addToEnclosingScope( *$1, TYPEDEFname, "10" );
-			$$ = DeclarationNode::newTypeDecl( $1, 0 );
+			$$ = DeclarationNode::newTypeDecl( $1, nullptr );
 		}
 	| identifier_or_type_name '(' type_parameter_list ')'
@@ -2978,5 +2978,5 @@
 trait_specifier:										// CFA
 	TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' '}'
-		{ $$ = DeclarationNode::newTrait( $2, $4, 0 ); }
+		{ $$ = DeclarationNode::newTrait( $2, $4, nullptr ); }
 	| TRAIT identifier_or_type_name '(' type_parameter_list ')' '{' push trait_declaration_list pop '}'
 		{ $$ = DeclarationNode::newTrait( $2, $4, $8 ); }
@@ -3060,5 +3060,5 @@
 		}
 	| ASM '(' string_literal ')' ';'					// GCC, global assembler statement
-		{ $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, 0 ) ) ); }
+		{ $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asm( false, $3, nullptr ) ) ); }
 	| EXTERN STRINGliteral
 		{
@@ -3304,5 +3304,5 @@
 variable_ptr:
 	ptrref_operator variable_declarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list variable_declarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3368,5 +3368,5 @@
 function_ptr:
 	ptrref_operator function_declarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list function_declarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3420,5 +3420,5 @@
 KR_function_ptr:
 	ptrref_operator KR_function_declarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list KR_function_declarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3476,5 +3476,5 @@
 type_ptr:
 	ptrref_operator variable_type_redeclarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list variable_type_redeclarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3534,5 +3534,5 @@
 identifier_parameter_ptr:
 	ptrref_operator identifier_parameter_declarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list identifier_parameter_declarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3591,5 +3591,5 @@
 type_parameter_ptr:
 	ptrref_operator type_parameter_redeclarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list type_parameter_redeclarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3634,9 +3634,9 @@
 abstract_ptr:
 	ptrref_operator
-		{ $$ = DeclarationNode::newPointer( 0, $1 ); }
+		{ $$ = DeclarationNode::newPointer( nullptr, $1 ); }
 	| ptrref_operator type_qualifier_list
 		{ $$ = DeclarationNode::newPointer( $2, $1 ); }
 	| ptrref_operator abstract_declarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list abstract_declarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3667,10 +3667,10 @@
 		// Only the first dimension can be empty.
 	'[' ']'
-		{ $$ = DeclarationNode::newArray( 0, 0, false ); }
+		{ $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
 	| '[' ']' multi_array_dimension
-		{ $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
+		{ $$ = DeclarationNode::newArray( nullptr, nullptr, false )->addArray( $3 ); }
 		// Cannot use constant_expression because of tuples => semantic check
 	| '[' push assignment_expression pop ',' comma_expression ']' // CFA
-		{ $$ = DeclarationNode::newArray( $3, 0, false )->addArray( DeclarationNode::newArray( $6, 0, false ) ); }
+		{ $$ = DeclarationNode::newArray( $3, nullptr, false )->addArray( DeclarationNode::newArray( $6, nullptr, false ) ); }
 		// { SemanticError( yylloc, "New array dimension is currently unimplemented." ); $$ = nullptr; }
 	| '[' push array_type_list pop ']'					// CFA
@@ -3701,9 +3701,9 @@
 multi_array_dimension:
 	'[' push assignment_expression pop ']'
-		{ $$ = DeclarationNode::newArray( $3, 0, false ); }
+		{ $$ = DeclarationNode::newArray( $3, nullptr, false ); }
 	| '[' push '*' pop ']'								// C99
 		{ $$ = DeclarationNode::newVarArray( 0 ); }
 	| multi_array_dimension '[' push assignment_expression pop ']'
-		{ $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
+		{ $$ = $1->addArray( DeclarationNode::newArray( $4, nullptr, false ) ); }
 	| multi_array_dimension '[' push '*' pop ']'		// C99
 		{ $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
@@ -3802,10 +3802,10 @@
 array_parameter_1st_dimension:
 	'[' ']'
-		{ $$ = DeclarationNode::newArray( 0, 0, false ); }
+		{ $$ = DeclarationNode::newArray( nullptr, nullptr, false ); }
 		// multi_array_dimension handles the '[' '*' ']' case
 	| '[' push type_qualifier_list '*' pop ']'			// remaining C99
 		{ $$ = DeclarationNode::newVarArray( $3 ); }
 	| '[' push type_qualifier_list pop ']'
-		{ $$ = DeclarationNode::newArray( 0, $3, false ); }
+		{ $$ = DeclarationNode::newArray( nullptr, $3, false ); }
 		// multi_array_dimension handles the '[' assignment_expression ']' case
 	| '[' push type_qualifier_list assignment_expression pop ']'
@@ -3836,9 +3836,9 @@
 variable_abstract_ptr:
 	ptrref_operator
-		{ $$ = DeclarationNode::newPointer( 0, $1 ); }
+		{ $$ = DeclarationNode::newPointer( nullptr, $1 ); }
 	| ptrref_operator type_qualifier_list
 		{ $$ = DeclarationNode::newPointer( $2, $1 ); }
 	| ptrref_operator variable_abstract_declarator
-		{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| ptrref_operator type_qualifier_list variable_abstract_declarator
 		{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
@@ -3882,13 +3882,13 @@
 		// No SUE declaration in parameter list.
 	ptrref_operator type_specifier_nobody
-		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| type_qualifier_list ptrref_operator type_specifier_nobody
 		{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
 	| ptrref_operator cfa_abstract_function
-		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| type_qualifier_list ptrref_operator cfa_abstract_function
 		{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
 	| ptrref_operator cfa_identifier_parameter_declarator_tuple
-		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
 		{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
@@ -3899,9 +3899,9 @@
 		// shift/reduce conflict with new-style empty (void) function return type.
 	'[' ']' type_specifier_nobody
-		{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
+		{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
 	| cfa_array_parameter_1st_dimension type_specifier_nobody
 		{ $$ = $2->addNewArray( $1 ); }
 	| '[' ']' multi_array_dimension type_specifier_nobody
-		{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
+		{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
 	| cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
 		{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
@@ -3910,9 +3910,9 @@
 
 	| '[' ']' cfa_identifier_parameter_ptr
-		{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
+		{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
 	| cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
 		{ $$ = $2->addNewArray( $1 ); }
 	| '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
-		{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
+		{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
 	| cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
 		{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
@@ -3970,13 +3970,13 @@
 cfa_abstract_ptr:										// CFA
 	ptrref_operator type_specifier
-		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| type_qualifier_list ptrref_operator type_specifier
 		{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
 	| ptrref_operator cfa_abstract_function
-		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| type_qualifier_list ptrref_operator cfa_abstract_function
 		{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
 	| ptrref_operator cfa_abstract_declarator_tuple
-		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
+		{ $$ = $2->addNewPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
 	| type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
 		{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }