https://issues.dlang.org/show_bug.cgi?id=22693
Issue ID: 22693
Summary: Lambda accepts auto parameter but fails on
instantiation
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: dmd
Assignee: [email protected]
Reporter: [email protected]
The compiler accepts the following:
```
alias func = (auto c) {};
```
But when instantiation `func` with some value it fails:
```
func(4);
```
Producing the following error:
```
onlineapp.d(4): Error: `auto` can only be used as part of `auto ref` for
template function parameters
onlineapp.d(5): Error: template `D main.__lambda1` cannot deduce function from
argument types `!()(int)`
onlineapp.d(4): Candidate is: `__lambda1`
```
We should either fail when declaring lambdas with auto or add support for it.
If we want to add support for this, templates should also cover it, to make it
consistent with all the language semantics.
--
