public void VisitArrayAssignNode(ArrayAssignStatement node)
{
node.IndexExpression.Accept(this);
node.AssignValueExpression.Accept(this);
node.IDNode.Accept(this);
TokenType exprEval = node.AssignValueExpression.EvaluationType;
Property prop = node.IDNode.Scope.GetProperty(node.IDNode.IDNode.ID);
if (node.IDNode.Scope.GetProperty(node.IDNode.IDNode.ID).GetTokenType() != TokenType.TYPE_ARRAY)
{
analyzer.notifyError(new IllegalAssignmentError(node));
}
else
{
ArrayProperty arrProp = (ArrayProperty)prop;
if (prop.DeclarationRow > node.Token.Row)
{
analyzer.notifyError(new UndeclaredVariableError(node.IDNode));
}
if (!LegitOperationChecker.isAssignCompatible(arrProp.ArrayElementType, exprEval))
{
analyzer.notifyError(new IllegalTypeError(node));
}
if (!LegitOperationChecker.CanBeAssignedTo(arrProp.ArrayElementType, exprEval))
{
analyzer.notifyError(new IllegalAssignmentError(node));
}
}
}
public void VisitSimpleExpression(SimpleExpression node)
{
if (node.HasAlreadyBeenEvaluated)
{
return;
}
node.Term.Accept(this);
TokenType termEval = node.Term.EvaluationType;
if (node.Tail != null)
{
node.Tail.Accept(this);
TokenType tailEval = node.Tail.EvaluationType;
if (!LegitOperationChecker.IsLegitOperationForEvaluations(node.Tail.Operation, termEval, tailEval))
{
termEval = TokenType.ERROR;
}
}
if (node.AdditiveInverse && !LegitOperationChecker.IsLegitOperationForEvaluations(TokenType.UNARY_OP_NEGATIVE, termEval))
{
termEval = TokenType.ERROR;
}
node.EvaluationType = termEval;
}
public void VisitTermNode(TermNode node)
{
if (node.HasAlreadyBeenEvaluated)
{
return;
}
node.Factor.Accept(this);
TokenType factorEval = node.Factor.EvaluationType;
if (node.TermTail != null)
{
node.TermTail.Accept(this);
TokenType tailEval = node.TermTail.EvaluationType;
if (!LegitOperationChecker.IsLegitOperationForEvaluations(node.TermTail.Operation, factorEval, tailEval))
{
factorEval = TokenType.ERROR;
}
// MUST HANDLE CASES WHERE INT + REAL EVALUATED
}
node.EvaluationType = factorEval;
}
/// <summary>
/// Checks the static semantic constraints of an AssignNode.
/// </summary>
/// <returns>An void.</returns>
/// <param name="node">Node.</param>
public void VisitAssignNode(AssignNode node)
{
node.IDNode.Accept(this);
node.AssignValueExpression.Accept(this);
bool errored = false;
TokenType varEval = node.IDNode.EvaluationType;
TokenType exprEval = node.AssignValueExpression.EvaluationType;
bool assignable = node.IDNode.EvaluationType != TokenType.ERROR;
Property varProperty = node.Scope.GetProperty(node.IDNode.IDNode.ID);
if (varProperty.DeclarationRow > node.Token.Row)
{
analyzer.notifyError(new UndeclaredVariableError(node.IDNode));
assignable = false;
errored = true;
}
if (!LegitOperationChecker.isAssignCompatible(varEval, exprEval) && !errored)
{
analyzer.notifyError(new IllegalAssignmentError(node));
assignable = false;
errored = true;
}
if (!LegitOperationChecker.CanBeAssignedTo(varEval, exprEval) && !errored)
{
analyzer.notifyError(new IllegalAssignmentError(node));
assignable = false;
errored = true;
}
if (assignable)
{
varProperty.Assigned = true;
}
}
public void VisitExpressionNode(ExpressionNode node)
{
node.Accept(this.typeChecker);
node.SimpleExpression.Accept(this);
if (node.ExpressionTail != null)
{
node.ExpressionTail.Accept(this);
if (!LegitOperationChecker.IsLegitOperationForEvaluations(node.ExpressionTail.Operation, node.SimpleExpression.EvaluationType, node.ExpressionTail.RightHandSide.EvaluationType))
{
node.EvaluationType = TokenType.ERROR;
}
else
{
node.EvaluationType = TokenType.BOOLEAN_VAL;
}
}
if (node.EvaluationType == TokenType.ERROR)
{
analyzer.notifyError(new IllegalTypeError(node));
}
}
public void VisitSimpleExpressionTail(SimpleExpressionTail node)
{
if (node.HasAlreadyBeenEvaluated)
{
return;
}
node.Term.Accept(this);
TokenType termEval = node.Term.EvaluationType;
if (node.Tail != null)
{
node.Tail.Accept(this);
TokenType tailEval = node.Tail.EvaluationType;
if (!LegitOperationChecker.IsLegitOperationForEvaluations(node.Tail.Operation, termEval, tailEval))
{
termEval = TokenType.ERROR;
}
}
node.EvaluationType = termEval;
}
public void VisitTermTailNode(TermTail node)
{
if (node.HasAlreadyBeenEvaluated)
{
return;
}
node.Factor.Accept(this);
TokenType factorEval = node.Factor.EvaluationType;
if (node.ChildTermTail != null)
{
node.ChildTermTail.Accept(this);
TokenType tailEval = node.ChildTermTail.EvaluationType;
if (!LegitOperationChecker.IsLegitOperationForEvaluations(node.ChildTermTail.Operation, factorEval, tailEval))
{
factorEval = TokenType.ERROR;
}
}
node.EvaluationType = factorEval;
}
public void VisitExpressionNode(ExpressionNode node)
{
if (node.HasAlreadyBeenEvaluated)
{
return;
}
node.SimpleExpression.Accept(this);
TokenType expressionEvaluation = node.SimpleExpression.EvaluationType;
if (node.ExpressionTail != null)
{
node.ExpressionTail.Accept(this);
TokenType tailEvaluation = node.ExpressionTail.RightHandSide.EvaluationType;
if (!LegitOperationChecker.IsLegitOperationForEvaluations(node.ExpressionTail.Operation, expressionEvaluation, tailEvaluation))
{
expressionEvaluation = TokenType.ERROR;
}
}
node.EvaluationType = expressionEvaluation;
}