public ConstructorDeclaringNode(IdentifierNode ident, TypeNode type, ParameterSequenceNode parameters, DeclaringSequenceNode vars,
ActionSequenceNode actions, SourceCodePosition pos) : base(pos)
{
Identifier = ident;
Type = type;
Parameters = parameters;
VarDeclarings = vars;
Actions = actions;
}
public MethodDeclaringNode(IdentifierNode ident, TypeNode type, ParameterSequenceNode parameters,
DeclaringSequenceNode vars, ActionSequenceNode actions, ReturnActionNode ret, SourceCodePosition pos)
: base(pos)
{
Identifier = ident;
Type = type;
Parameters = parameters;
VarDeclarings = vars;
Actions = actions;
Return = ret;
}
private ActionNode ParseElseifStatement()
{
ActionNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
Accept(Token.TokenType.Elseif);
Accept(Token.TokenType.LeftParen);
ExpressionNode itsExpr = Expression();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new ElseifActionNode(itsExpr, itsActions, itsPos);
return(itsAST);
}
private ActionSequenceNode ParseElseifStatements()
{
ActionSequenceNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
ActionNode itsAction = ParseElseifStatement();
if (_currentToken.Type == Token.TokenType.Elseif)
{
ActionSequenceNode itsNextActions = ParseElseifStatements();
itsAST = new MultipleActionSequenceNode(itsAction, itsNextActions, itsPos);
}
else
{
itsAST = new SingleActionSequenceNode(itsAction, itsPos);
}
return(itsAST);
}
private ActionSequenceNode ParseActionStatements()
{
ActionSequenceNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
ActionNode itsAction = ParseActionStatement();
if (Array.Exists(_actionStatementFirstSet, e => e == _currentToken.Type))
{
ActionSequenceNode itsNextActions = ParseActionStatements();
itsAST = new MultipleActionSequenceNode(itsAction, itsNextActions, itsPos);
}
else
{
itsAST = new SingleActionSequenceNode(itsAction, itsPos);
}
return(itsAST);
}
private ActionNode ElseStatement()
{
ActionNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
if (_currentToken.Type == Token.TokenType.Else)
{
Accept(Token.TokenType.Else);
Accept(Token.TokenType.LeftBrace);
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new ElseActionNode(itsActions, itsPos);
}
else
{
itsAST = new EmptyActionNode(itsPos);
}
return(itsAST);
}
private ConstructorDeclaringNode ConstructorDeclaring()
{
ConstructorDeclaringNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
Accept(Token.TokenType.Constructor);
IdentifierNode itsName = new IdentifierNode(_currentToken);
TypeNode itsType = new ClassTypeNode(itsName, itsPos);
Accept(Token.TokenType.Identifier);
Accept(Token.TokenType.LeftParen);
ParameterSequenceNode itsParams = Parameters();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
DeclaringSequenceNode itsVars = VariableDeclarings();
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new ConstructorDeclaringNode(itsName, itsType, itsParams, itsVars, itsActions, itsPos);
return(itsAST);
}
private MethodDeclaringNode ParseMethodDeclaring()
{
MethodDeclaringNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
Accept(Token.TokenType.Method);
TypeNode itsType = ReturnType();
IdentifierNode itsName = new IdentifierNode(_currentToken);
Accept(Token.TokenType.Identifier);
Accept(Token.TokenType.LeftParen);
ParameterSequenceNode itsParams = Parameters();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
DeclaringSequenceNode itsVars = VariableDeclarings();
ActionSequenceNode itsActions = ActionStatements();
ReturnActionNode itsReturn = ReturnStatement();
Accept(Token.TokenType.RightBrace);
itsAST = new MethodDeclaringNode(itsName, itsType, itsParams, itsVars, itsActions, itsReturn, itsPos);
return(itsAST);
}
private ActionNode IterationStatement()
{
ActionNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
if (_currentToken.Type == Token.TokenType.While)
{
Accept(Token.TokenType.While);
Accept(Token.TokenType.LeftParen);
ExpressionNode itsExpr = Expression();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new WhileActionNode(itsExpr, itsActions, itsPos);
}
else
{
Accept(Token.TokenType.Foreach);
Accept(Token.TokenType.LeftParen);
VarDeclaringNode itsDecl;
Accept(Token.TokenType.Var);
TypeNode itsType = Type();
IdentifierNode itsName = new IdentifierNode(_currentToken, itsType);
Accept(Token.TokenType.Identifier);
itsDecl = new VarDeclaringNode(itsName, itsType, itsPos);
Accept(Token.TokenType.In);
ExpressionNode itsExpr = Expression();
Accept(Token.TokenType.RightParen);
Accept(Token.TokenType.LeftBrace);
ActionSequenceNode itsActions = ActionStatements();
Accept(Token.TokenType.RightBrace);
itsAST = new ForeachActionNode(itsDecl, itsName, itsExpr, itsActions, itsPos);
}
return(itsAST);
}
