public void Visit(ReadNode node)
{
if (node.Children.Count != 1)
{
throw new InternalCompilerError("Invalid node count for read node");
}
if (!(node.Children[0] is IdentifierNode))
{
throw new InternalCompilerError("Invalid node type for read node");
}
var identifier = (IdentifierNode)node.Children[0];
if (!SymbolTable.ContainsKey(identifier.Name))
{
ReportUndeclaredVariable(identifier);
return;
}
identifier.Accept(this);
if (identifier.NodeType() == VariableType.BOOLEAN)
{
reporter.ReportError(
Error.SEMANTIC_ERROR,
"Variable has invalid type '" + VariableType.BOOLEAN.Name() + "'" +
" when '" + VariableType.INTEGER.Name() + "' or '" +
VariableType.STRING.Name() + "' were expected",
identifier.Line,
identifier.Column
);
NoteVariableWasDeclaredHere(identifier.Name);
}
}
public void Visit(ReadNode node)
{
switch (node.Children[0].NodeType())
{
case VariableType.INTEGER:
Emit(Bytecode.READ_INT);
break;
case VariableType.STRING:
Emit(Bytecode.READ_STRING);
break;
default:
throw new InternalCompilerError("Invalid type for readnode");
}
var name = ((IdentifierNode)node.Children[0]).Name;
Emit(symbolTable[name].id);
}