public AST Apply(Token operata, AST op1, AST op2)
{
op1 = this.Convert(op1);
if (!operata.Is(TokenType.FULL_STOP))
{
op2 = this.Convert(op2);
}
switch (operata.Type)
{
case TokenType.TIMES:
return(new Tree.Number((op1.Evaluate(this.env).Value *op2.Evaluate(this.env).Value).ToString()));
case TokenType.DIVIDE:
return(new Tree.Number((op1.Evaluate(this.env).Value / op2.Evaluate(this.env).Value).ToString()));
case TokenType.PLUS:
return(this.ApplyPLUS(operata, op1, op2));
case TokenType.MINUS:
return(new Tree.Number((op1.Evaluate(this.env).Value - op2.Evaluate(this.env).Value).ToString()));
case TokenType.MODULUS:
return(new Tree.Number((op1.Evaluate(this.env).Value % op2.Evaluate(this.env).Value).ToString()));
case TokenType.EQUAL_TO:
return(new Tree.Boolean((op1.Evaluate(this.env).Value == op2.Evaluate(this.env).Value).ToString()));
case TokenType.NOT_EQUAL_TO:
return(new Tree.Boolean((op1.Evaluate(this.env).Value != op2.Evaluate(this.env).Value).ToString()));
case TokenType.LESS_THAN:
return(new Tree.Boolean((op1.Evaluate(this.env).Value < op2.Evaluate(this.env).Value).ToString()));
case TokenType.LESS_THAN_OR_EQUAL_TO:
return(new Tree.Boolean((op1.Evaluate(this.env).Value <= op2.Evaluate(this.env).Value).ToString()));
case TokenType.GREATER_THAN:
return(new Tree.Boolean((op1.Evaluate(this.env).Value > op2.Evaluate(this.env).Value).ToString()));
case TokenType.GREATER_THAN_OR_EQUAL_TO:
return(new Tree.Boolean((op1.Evaluate(env).Value >= op2.Evaluate(env).Value).ToString()));
case TokenType.LOGICAL_AND:
var op1Res = op1.Evaluate(this.env).Value;
var op2Res = op2.Evaluate(this.env).Value;
return(new Tree.Boolean((op1Res && op2Res).ToString()));
case TokenType.LOGICAL_OR:
var operationOneRes = op1.Evaluate(this.env).Value;
var operationTwoRes = op2.Evaluate(this.env).Value;
return(new Tree.Boolean((operationOneRes || operationTwoRes).ToString()));
case TokenType.FULL_STOP:
return(this.AccessModifier(op1, op2));
default:
this.Error(operata.Type + " cannot be used as an expression operator", operata.Row, operata.Column);
return(null);
}
}
/*
* Helper functions
*/
private bool checkType(AST oparand, TreeType type)
{
return(oparand.Type == type);
}
public Assignment(string left, AST right) : base(TreeType.ASSIGNMENT)
{
this.right = right;
this.left = left;
}