Issue 0305: 6.10.1p3: Clarifying handling of keywords in #if directives

This issue has been automatically converted from the original issue lists and some formatting may not have been preserved.

Authors: WG21, WG21
Date: 2004-10-26
Reference document: ISO/IEC WG14 N1068
Submitted against: C99
Status: Fixed
Fixed in: C99 TC3
Converted from: summary-c99.htm, dr_305.htm

Summary

This just clarifies that keywords are not treated specially in #if directives. (In C++, the keywords true and false are treated specially in this regard; I suspect that someone didn't want the sentence to read, "... all remaining identifiers, except for true and false, are replaced ...", for reasons which seem fairly obvious to me.)

Suggested Technical Corrigendum

Change the following sentence in 6.10.1p3:

After all replacements due to macro expansion and the defined unary operator have been performed, all remaining identifiers and keywords are replaced with the pp-number 0, and then each preprocessing token is converted into a token.

Comment from WG14 on 2006-03-05:

Committee Response

It is clear from the standard (in particular, the phases of translation) that there are not yet any keywords at the point in question.

Technical Corrigendum

Change the following sentence in 6.10.1p3:

After all replacements due to macro expansion and the defined unary operator have been performed, all remaining identifiers (including those lexically identical to keywords) are replaced with the pp-number 0, and then each preprocessing token is converted into a token.