public void visitForLoop(ForLoopNode node)
{
IdentifierNode identifier = (IdentifierNode)node.getChildren()[0];
string variableName = identifier.getVariableName();
if (!variableAlreadyDeclared(variableName))
{
throw new SemanticException("The control variable '" + variableName + "' in for loop has not been declared.");
}
this.forLoopControlVariables.Push(variableName);
node.getChildren()[2].accept(this);
this.forLoopControlVariables.Pop();
}
public void visitForLoop(ForLoopNode forLoopNode)
{
IdentifierNode identifier = (IdentifierNode)forLoopNode.getChildren()[0];
string controlVariable = identifier.getVariableName();
RangeOperatorNode rangeNode = (RangeOperatorNode)forLoopNode.getChildren()[1];
StatementListNode forStatements = (StatementListNode)forLoopNode.getChildren()[2];
rangeNode.getChildren()[0].accept(this);
int begin = popInt();
rangeNode.getChildren()[1].accept(this);
int end = popInt();
for (int i = begin; i <= end; i++)
{
this.symbolTable.updateVariable(controlVariable, i);
foreach (INode child in forStatements.getChildren())
{
child.accept(this);
}
}
}
public void visitForLoop(ForLoopNode node)
{
RangeOperatorNode rangeOperatorNode = (RangeOperatorNode)node.getChildren()[1];
this.typeStack = new Stack <MiniPLTokenType>();
INode leftExpression = rangeOperatorNode.getChildren()[0];
this.typeStack.Push(MiniPLTokenType.TYPE_IDENTIFIER_INTEGER);
accessChildren(leftExpression);
if (this.typeStack.Pop() != MiniPLTokenType.TYPE_IDENTIFIER_INTEGER)
{
throw new SemanticException("Expected an integer. Wrong type in the left hand side of range operator.");
}
INode rightExpression = rangeOperatorNode.getChildren()[1];
this.typeStack.Clear();
this.typeStack.Push(MiniPLTokenType.TYPE_IDENTIFIER_INTEGER);
accessChildren(rightExpression);
if (this.typeStack.Pop() != MiniPLTokenType.TYPE_IDENTIFIER_INTEGER)
{
throw new SemanticException("Expected an integer. Wrong type in the right hand side of range operator.");
}
}