public IOReadNode CreateIOReadNode(VariableIdNode idNode, StatementsNode statementsNode, Token t)
{
IOReadNode ioReadNode = new IOReadNode(idNode, symbolTable, t);
statementsNode.Statement = ioReadNode;
return(ioReadNode);
}
/// <summary>
/// Visits the IO read node.
/// </summary>
/// <returns>An ISemanticCheckValue.</returns>
/// <param name="node">Node.</param>
public ISemanticCheckValue VisitIOReadNode(IOReadNode node)
{
// read an input
string input = reader.readLine();
// select the first word of the input
input = input.Split(new[] { ' ', '\t', '\n' })[0];
// set the input to the ioreadnode's assignment
AssignNode assignNode = node.AssignNode;
setAssignValue(input, assignNode);
// execute the assign node
assignNode.Accept(this);
return(voidProperty);
}
/// <summary>
/// Checks the static semantic constraints of an IOReadNode.
/// </summary>
/// <returns>An ISemanticCheckValue.</returns>
/// <param name="node">Node.</param>
public ISemanticCheckValue VisitIOReadNode(IOReadNode node)
{
// check that the id property is ok
IProperty property = getVariableProperty(node);
if (property == voidProperty)
{
return(voidProperty);
}
VariableIdNode idNode = node.IDNode;
// check that the variable we're about to read into is declared
checkPropertyDeclared(node, property, true);
// check that we don't try to read a boolean value
if (checkPropertyType(property, TokenType.BOOL_VAL))
{
analyzer.notifyError(new IllegalTypeError(idNode));
}
return(voidProperty);
}
/// <summary>
/// Visits the IO read node.
/// </summary>
/// <returns>An ISemanticCheckValue.</returns>
/// <param name="node">Node.</param>
public ISemanticCheckValue VisitIOReadNode(IOReadNode node)
{
// nothing to evaluate here, it's done from the ExecutionVisitor
return(voidProperty);
}
/// <summary>
/// Visits the IO read node.
/// </summary>
/// <returns>An ISemanticCheckValue.</returns>
/// <param name="node">Node.</param>
public ISemanticCheckValue VisitIOReadNode(IOReadNode node)
{
// return the node's variable's evaluation
return(node.IDNode.Accept(this));
}
