https://bugs.llvm.org/show_bug.cgi?id=51856
Bug ID: 51856
Summary: Can't constrain the auto introducing a
trailing-return-type
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Keywords: compile-fail
Severity: enhancement
Priority: P
Component: C++2a
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
This does not appear to be forbidden by [dcl.spec.auto.general].
See https://godbolt.org/z/96GcvfMdK.
```C++
template<class>concept C=true;
C auto f()->int;
```
```
<source>:2:1: error: function with trailing return type must specify return
type 'auto', not 'C auto'
C auto f()->int;
^~~~~~
1 error generated.
Compiler returned: 1
```
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