https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
Bug ID: 109994
Summary: Issue a diagnostic when a C++ file defines a macro
that hides a keyword
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
The C++ standard says this is undefined:
#define new foo
It might be nice if the preprocessor had a warning about it.
[macro.names]
A translation unit shall not #define or #undef names lexically identical to
keywords, to the identifiers listed in Table 4, or to the attribute-tokens
described in 9.12, except that the names likely and unlikely may be defined as
function-like macros (15.6).
