On 11/3/20 2:14 PM, Nathan Sidwell wrote:
>
> Header units can provide macros to an importer. For efficiency that
> is done lazily. When we import a header unit we mark the identifers
> it defines as significant. It's only when we need the macro
> definition (including in #ifdef &| defined
Header units can provide macros to an importer. For efficiency that is
done lazily. When we import a header unit we mark the identifers it
defines as significant. It's only when we need the macro definition
(including in #ifdef &| defined (X) processing) that we resolve the
macro. We
