[Bug c++/108538] unexpected -Wnarrowing errors in -fpermissive mode
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108538 --- Comment #4 from Stas Sergeev --- (In reply to Jonathan Wakely from comment #3) > It seems like you might be expecting more from -fpermissive than it actually > provides. It only affects a very limited set of diagnostics, and isn't a > general "compile invalid code" switch. I always used it to compile the (valid) C code in C++ mode. I thought that's what it is for. It violates the C++ standard up and down. And that -Wnarrowing case is "better" than others because it was a warning in c++03. Other problems that -fpermissive allows, were always an errors in any c++ mode.
[Bug c++/108538] unexpected -Wnarrowing errors in -fpermissive mode
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108538 Jonathan Wakely changed: What|Removed |Added Last reconfirmed||2023-01-25 Status|UNCONFIRMED |NEW Severity|normal |enhancement CC||jason at gcc dot gnu.org Ever confirmed|0 |1 Keywords||diagnostic --- Comment #3 from Jonathan Wakely --- (In reply to Stas Sergeev from comment #2) > But I used -fpermissive mode to > compile the mix of c/c++. It seems like you might be expecting more from -fpermissive than it actually provides. It only affects a very limited set of diagnostics, and isn't a general "compile invalid code" switch. It might be reasonable to make it affect narrowing diagnostics though. The downside would be complicating the code by adding even more interactions between different switches and dialects. Confirming as an enhancement request to relax some narrowing errors with -fpermissive, but C++ front end maintainers should decide whether that's actually desirable.
[Bug c++/108538] unexpected -Wnarrowing errors in -fpermissive mode
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108538 --- Comment #2 from Stas Sergeev --- (In reply to Andreas Schwab from comment #1) > It depends on the selected C++ standard. C++11 does not allow narrowing > conversions unconditionally. Yes, I am not disputing that. But I used -fpermissive mode to compile the mix of c/c++. -fpermissive downgrades many C++ errors to a warning, eating most of the regular C. So my question here is explicitly about -fpermissive mode, I think it should downgrade -Wnarrowing back into the warning.
[Bug c++/108538] unexpected -Wnarrowing errors in -fpermissive mode
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108538 --- Comment #1 from Andreas Schwab --- It depends on the selected C++ standard. C++11 does not allow narrowing conversions unconditionally.
