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* [Bug c++/114237] New: GCC emits no narrowing conversion warning when call is made indirectly through std::invoke
@ 2024-03-05 12:34 jlame646 at gmail dot com
2024-03-05 14:28 ` [Bug c++/114237] " redi at gcc dot gnu.org
2024-03-05 14:29 ` redi at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: jlame646 at gmail dot com @ 2024-03-05 12:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114237
Bug ID: 114237
Summary: GCC emits no narrowing conversion warning when call is
made indirectly through std::invoke
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jlame646 at gmail dot com
Target Milestone: ---
Gcc emits no narrowing conversion warning for the following program. Only msvc
emits the warning. https://godbolt.org/z/EPKv9fdWr
```
void expectsInt32(int32_t) {
/* … */
}
template<typename Func, typename Arg>
void call(Func func, Arg arg) {
std::invoke(func, arg); // arg is size_t, potentially causing narrowing
conversion
}
int main() {
size_t largeNumber = 4294967295; // Maximum value for uint32_t
call(expectsInt32, largeNumber); // Compiles without warning in GCC/Clang
with -Wconversion
return 0;
}
```
Even with -Wconversion and other flags as shown in the demo, no warning is
emitted by gcc and clang.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/114237] GCC emits no narrowing conversion warning when call is made indirectly through std::invoke
2024-03-05 12:34 [Bug c++/114237] New: GCC emits no narrowing conversion warning when call is made indirectly through std::invoke jlame646 at gmail dot com
@ 2024-03-05 14:28 ` redi at gcc dot gnu.org
2024-03-05 14:29 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2024-03-05 14:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114237
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The conversion happens in a system header, so is suppressed without
-Wsystem-headers
There are existing bug reports about -Wconversion warnings being suppressed in
system headers.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/114237] GCC emits no narrowing conversion warning when call is made indirectly through std::invoke
2024-03-05 12:34 [Bug c++/114237] New: GCC emits no narrowing conversion warning when call is made indirectly through std::invoke jlame646 at gmail dot com
2024-03-05 14:28 ` [Bug c++/114237] " redi at gcc dot gnu.org
@ 2024-03-05 14:29 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2024-03-05 14:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114237
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 43167 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-03-05 12:34 [Bug c++/114237] New: GCC emits no narrowing conversion warning when call is made indirectly through std::invoke jlame646 at gmail dot com
2024-03-05 14:28 ` [Bug c++/114237] " redi at gcc dot gnu.org
2024-03-05 14:29 ` redi at gcc dot gnu.org
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