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Subject: Header unit importation syntax
From: Maris Razvan (razvyboy2004_at_[hidden])
Date: 2019-08-23 16:12:52


In the current C++ draft (august 2019), the grammar for a pp-import
(http://eel.is/c++draft/cpp.import#nt:pp-import) allows for additional
pp-tokens after the header-name or the header-name-tokens.

The current version of that section is the result of P1703:
"Recognizing Header Unit Imports Requires Full Preprocessing"
Before the changes caused by this proposal, the grammar still allowed
for preprocessing tokens tokens after the header-name or the
header-name-tokens, but in the form of a pp-import-suffix. (section
[cpp.module] of P1103

What is the reasoning behind allowing additional, unused preprocessing
tokens in this context?

Thank you.

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