How to disable Clang warning “no case matching constant switch condition”
I am working on a project that uses code from another project, and that other code is giving me a bunch of warnings during compilation. I don't want to change that code (my project is just a thin wrapper around their code and I want to be able to pull in updates without patching all the time) so I'd like to disable these warnings so I can focus on just my own code.
Unfortunately I can't see where this is documented!
The error I am receiving is:
warning: no case matching constant switch condition '2'
I have looked in the manual and tried -Wno-switch, -Wno-switch-bool and -Wno-switch-enum but none of them make this warning go away. I can't see where in the manual this warning message is listed.
Using Google I haven't been able to find any command-line option that matches up with the error text.
Using GitHub I was able to find the LLVM source that runs a test for this warning but I'm not having any luck mapping that back to a -W option to disable it.
What am I missing?
Here is some code that reproduces the error:
enum En { A, B, C };
template <En how> void foo() {
int x = 0, y = 5;
switch (how) {
case A: x *= y; break;
case B: x += y; break;
}
}
template void foo<C>();
int main(void)
{
return 0;
}
clang++ suppress-warnings
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
add a comment |
I am working on a project that uses code from another project, and that other code is giving me a bunch of warnings during compilation. I don't want to change that code (my project is just a thin wrapper around their code and I want to be able to pull in updates without patching all the time) so I'd like to disable these warnings so I can focus on just my own code.
Unfortunately I can't see where this is documented!
The error I am receiving is:
warning: no case matching constant switch condition '2'
I have looked in the manual and tried -Wno-switch, -Wno-switch-bool and -Wno-switch-enum but none of them make this warning go away. I can't see where in the manual this warning message is listed.
Using Google I haven't been able to find any command-line option that matches up with the error text.
Using GitHub I was able to find the LLVM source that runs a test for this warning but I'm not having any luck mapping that back to a -W option to disable it.
What am I missing?
Here is some code that reproduces the error:
enum En { A, B, C };
template <En how> void foo() {
int x = 0, y = 5;
switch (how) {
case A: x *= y; break;
case B: x += y; break;
}
}
template void foo<C>();
int main(void)
{
return 0;
}
clang++ suppress-warnings
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
add a comment |
I am working on a project that uses code from another project, and that other code is giving me a bunch of warnings during compilation. I don't want to change that code (my project is just a thin wrapper around their code and I want to be able to pull in updates without patching all the time) so I'd like to disable these warnings so I can focus on just my own code.
Unfortunately I can't see where this is documented!
The error I am receiving is:
warning: no case matching constant switch condition '2'
I have looked in the manual and tried -Wno-switch, -Wno-switch-bool and -Wno-switch-enum but none of them make this warning go away. I can't see where in the manual this warning message is listed.
Using Google I haven't been able to find any command-line option that matches up with the error text.
Using GitHub I was able to find the LLVM source that runs a test for this warning but I'm not having any luck mapping that back to a -W option to disable it.
What am I missing?
Here is some code that reproduces the error:
enum En { A, B, C };
template <En how> void foo() {
int x = 0, y = 5;
switch (how) {
case A: x *= y; break;
case B: x += y; break;
}
}
template void foo<C>();
int main(void)
{
return 0;
}
clang++ suppress-warnings
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
I am working on a project that uses code from another project, and that other code is giving me a bunch of warnings during compilation. I don't want to change that code (my project is just a thin wrapper around their code and I want to be able to pull in updates without patching all the time) so I'd like to disable these warnings so I can focus on just my own code.
Unfortunately I can't see where this is documented!
The error I am receiving is:
warning: no case matching constant switch condition '2'
I have looked in the manual and tried -Wno-switch, -Wno-switch-bool and -Wno-switch-enum but none of them make this warning go away. I can't see where in the manual this warning message is listed.
Using Google I haven't been able to find any command-line option that matches up with the error text.
Using GitHub I was able to find the LLVM source that runs a test for this warning but I'm not having any luck mapping that back to a -W option to disable it.
What am I missing?
Here is some code that reproduces the error:
enum En { A, B, C };
template <En how> void foo() {
int x = 0, y = 5;
switch (how) {
case A: x *= y; break;
case B: x += y; break;
}
}
template void foo<C>();
int main(void)
{
return 0;
}
clang++ suppress-warnings
clang++ suppress-warnings
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
asked Nov 18 '18 at 9:21
MalvineousMalvineous
11.5k87598
11.5k87598
add a comment |
add a comment |
1 Answer
1
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oldest
votes
I'm afraid there is no -Wno-<what> flag that can specifically suppress this warning.
If there was, then the diagnostic would be:
warning: no case matching constant switch condition '2' [-W<what>]
You can only suppress it by suppressing all warnings, with -Wno-everything,
which of course I would not advise.
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I'm afraid there is no -Wno-<what> flag that can specifically suppress this warning.
If there was, then the diagnostic would be:
warning: no case matching constant switch condition '2' [-W<what>]
You can only suppress it by suppressing all warnings, with -Wno-everything,
which of course I would not advise.
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
add a comment |
I'm afraid there is no -Wno-<what> flag that can specifically suppress this warning.
If there was, then the diagnostic would be:
warning: no case matching constant switch condition '2' [-W<what>]
You can only suppress it by suppressing all warnings, with -Wno-everything,
which of course I would not advise.
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
add a comment |
I'm afraid there is no -Wno-<what> flag that can specifically suppress this warning.
If there was, then the diagnostic would be:
warning: no case matching constant switch condition '2' [-W<what>]
You can only suppress it by suppressing all warnings, with -Wno-everything,
which of course I would not advise.
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
I'm afraid there is no -Wno-<what> flag that can specifically suppress this warning.
If there was, then the diagnostic would be:
warning: no case matching constant switch condition '2' [-W<what>]
You can only suppress it by suppressing all warnings, with -Wno-everything,
which of course I would not advise.
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
answered Nov 18 '18 at 19:02
Mike KinghanMike Kinghan
30.8k764114
30.8k764114
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
add a comment |
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
What a shame! Thanks for confirming, glad it wasn't me just looking in the wrong place!
– Malvineous
Nov 18 '18 at 23:39
add a comment |
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