https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109653
Bug ID: 109653
Summary: [[clang::fallthrough]] recognised up to g++ v12 not
not g++ v13
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc-bugs at aitchison dot me.uk
Target Milestone: ---
Created attachment 54945
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54945&action=edit
Test alternate spelling clang::fallthrough
g++ v12 and earlier ignore the line
[[clang::fallthrough]];
but v13 complains:
warning: attributes at the beginning of statement are ignored [-Wattributes]
This is a common alternative spelling of
[[gnu::fallthrough]];
and
[[fallthrough]];
so it is a pity that when g++ supports the feature in its default mode (ie
without specifying a --std) it starts objecting to code which on some other
compilers enables the functionality.
