public FrameResource Visit(IdentifierExpression expression)
{
var resource = _scope.GetOrDefault(expression.Name);
if (resource == null)
{
throw new Exception(); // TODO
}
var copyResource = _frame.Allocate(resource.Type);
_context.Emit(new Instruction(Opcode.Mov, copyResource.Operand, resource.Operand));
return(copyResource);
}
public bool TryDefine(string name, TypeBase type, out FrameResource resource)
{
resource = null;
if (IsDefined(name))
{
return(false);
}
resource = Frame.Allocate(type, false);
_identifiers.Add(name, resource);
return(true);
}