public override void VisitUnaryExpression(UnaryExpression unaryExpression)
{
Visit(unaryExpression.Operand);
var unaryOp = new UnaryOperation(unaryExpression.Operation, ExpressionStack.Pop());
var variable = new Identifier(NewVariable);
var assignment = new Assignment(variable.Name, unaryOp);
Program.Add(assignment);
ExpressionStack.Push(variable);
}
public override void VisitBinaryExpression(BinaryExpression binaryExpression)
{
Visit(binaryExpression.Left);
var leftExpression = ExpressionStack.Pop();
Visit(binaryExpression.Right);
var rightExpression = ExpressionStack.Pop();
var variable = new Identifier(NewVariable);
var binOp = new BinaryOperation(leftExpression, binaryExpression.Operation, rightExpression);
Program.Add(new Assignment(variable.Name, binOp));
ExpressionStack.Push(variable);
}
public override void VisitFor(ForStatement forStatement)
{
Visit(forStatement.From);
Program.Add(new Assignment(forStatement.ForVariable.Name, ExpressionStack.Pop()));
var forBegin = NewLabel;
var forEnd = NewLabel;
var forVariable = new Identifier(forStatement.ForVariable.Name);
Visit(forStatement.To);
var forTo = ExpressionStack.Pop();
var check = new ConditionalGoto(
forEnd,
new BinaryOperation(forVariable, Operation.Greater, forTo))
{
Label = forBegin
};
Program.Add(check);
Visit(forStatement.Body);
Program.Add(Assignment.Increment(forVariable.Name));
Program.Add(new Goto(forBegin));
Program.Add(new NoOperation(forEnd));
}