[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 Martin Liška changed: What|Removed |Added Keywords|needs-bisection | --- Comment #9 from Martin Liška --- Just for the record, started with r10-3735-gcb57504a55015891.
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 Jonathan Wakely changed: What|Removed |Added Resolution|--- |DUPLICATE Status|UNCONFIRMED |RESOLVED --- Comment #8 from Jonathan Wakely --- (In reply to ensadc from comment #1) > Possible duplicate of issue 67217 Yes, I think so. *** This bug has been marked as a duplicate of bug 67217 ***
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 --- Comment #7 from Andrew Pinski --- (In reply to Martin Liška from comment #6) > $ g++ --version > g++ (GCC) 12.0.0 20211208 (experimental) > > $ g++ pr83000.C -c -fconcepts > pr83000.C: In function ‘int main()’: > pr83000.C:6:18: error: template constraint failure for ‘template > requires sizeof (T) > 1 union Test’ > 6 | Test x; > | ^ > pr83000.C:6:18: note: constraints not satisfied > pr83000.C: In substitution of ‘template requires sizeof (T) > 1 > union Test [with T = char]’: > pr83000.C:6:18: required from here > pr83000.C:3:11: required by the constraints of ‘template > requires sizeof (T) > 1 union Test’ > pr83000.C:2:25: note: the expression ‘sizeof (T) > 1 [with T = char]’ > evaluated to ‘false’ > 2 | requires (sizeof(T) > 1) > | ~~~^~~~ Right, it is supposed to be rejected like that as sizeof(char) < 1 is false. GCC 9 accepted the code.
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 --- Comment #6 from Martin Liška --- $ g++ --version g++ (GCC) 12.0.0 20211208 (experimental) $ g++ pr83000.C -c -fconcepts pr83000.C: In function ‘int main()’: pr83000.C:6:18: error: template constraint failure for ‘template requires sizeof (T) > 1 union Test’ 6 | Test x; | ^ pr83000.C:6:18: note: constraints not satisfied pr83000.C: In substitution of ‘template requires sizeof (T) > 1 union Test [with T = char]’: pr83000.C:6:18: required from here pr83000.C:3:11: required by the constraints of ‘template requires sizeof (T) > 1 union Test’ pr83000.C:2:25: note: the expression ‘sizeof (T) > 1 [with T = char]’ evaluated to ‘false’ 2 | requires (sizeof(T) > 1) | ~~~^~~~ $ g++ pr83000.C -c -std=c++2a pr83000.C: In function ‘int main()’: pr83000.C:6:18: error: template constraint failure for ‘template requires sizeof (T) > 1 union Test’ 6 | Test x; | ^ pr83000.C:6:18: note: constraints not satisfied pr83000.C: In substitution of ‘template requires sizeof (T) > 1 union Test [with T = char]’: pr83000.C:6:18: required from here pr83000.C:3:11: required by the constraints of ‘template requires sizeof (T) > 1 union Test’ pr83000.C:2:25: note: the expression ‘sizeof (T) > 1 [with T = char]’ evaluated to ‘false’ 2 | requires (sizeof(T) > 1) | ~~~^~~~
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 --- Comment #5 from Andrew Pinski --- (In reply to Andrew Pinski from comment #4) > (In reply to Martin Liška from comment #3) > > (In reply to Andrew Pinski from comment #2) > > > Seems fixed in GCC 10. > > > > Are you sure, all releases I have reject the code. > > You need -std=c++2a or -std=c++20 or -fconcepts to support concepts :). GCC 9 does not enable concepts for -std=c++2a so you need -fconcepts really.
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 Andrew Pinski changed: What|Removed |Added Status|WAITING |UNCONFIRMED Ever confirmed|1 |0 --- Comment #4 from Andrew Pinski --- (In reply to Martin Liška from comment #3) > (In reply to Andrew Pinski from comment #2) > > Seems fixed in GCC 10. > > Are you sure, all releases I have reject the code. You need -std=c++2a or -std=c++20 or -fconcepts to support concepts :).
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 Martin Liška changed: What|Removed |Added Status|UNCONFIRMED |WAITING Last reconfirmed||2021-12-08 CC||marxin at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #3 from Martin Liška --- (In reply to Andrew Pinski from comment #2) > Seems fixed in GCC 10. Are you sure, all releases I have reject the code. With the current master: g++ pr83000.C -c pr83000.C:2:14: error: expected constructor, destructor, or type conversion before ‘(’ token 2 | requires (sizeof(T) > 1) | ^ pr83000.C: In function ‘int main()’: pr83000.C:6:9: error: ‘Test’ was not declared in this scope 6 | Test x; | ^~~~ pr83000.C:6:14: error: expected primary-expression before ‘char’ 6 | Test x; | ^~~~
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 Andrew Pinski changed: What|Removed |Added Known to work||10.1.0 Keywords||accepts-invalid --- Comment #2 from Andrew Pinski --- Seems fixed in GCC 10.
[Bug c++/83000] Constraints for union-templates do not work
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000 ensadc at mailnesia dot com changed: What|Removed |Added CC||ensadc at mailnesia dot com --- Comment #1 from ensadc at mailnesia dot com --- Possible duplicate of issue 67217
