/* VariableExpression perhaps ought to be called IdentifierExpression as it is used for both constants and variables. */
public void visit(VariableExpression that)
{
Console.Write(that.Name);
}
/* VariableExpression perhaps ought to be called IdentifierExpression as it is used for both constants and variables. */
public void visit(VariableExpression that)
{
Declaration declaration = _symbols.Lookup(that.Name);
if (declaration == null)
throw new CheckerError(that.Position, "Undefined constant or variable '" + that.Name + "' in expression");
that.Type = declaration.Type;
}
