[Issue 8367] std.range.chain's template constraint is inadequate

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8367



--- Comment #1 from github-bugzilla at puremagic.com 2013-01-08 23:07:31 PST ---
Commits pushed to master at https://github.com/D-Programming-Language/phobos

https://github.com/D-Programming-Language/phobos/commit/1008da752b135e41e26bc9fedeaffe824046be4e
Issue 8367 - Insufficient constraints for chain

The error message from compiling the bug's sample code after this change is:

```
bug.d(11): Error: template std.range.chain does not match any function template
declaration. Candidates are:
std/range.d(2018):        std.range.chain(Ranges...)(Ranges rs) if
(Ranges.length > 0 && allSatisfy!(isInputRange, staticMap!(Unqual, Ranges)) &&
!is(CommonType!(staticMap!(ElementType, staticMap!(Unqual, Ranges))) == void))
bug.d(11): Error: template std.range.chain(Ranges...)(Ranges rs) if
(Ranges.length > 0 && allSatisfy!(isInputRange, staticMap!(Unqual, Ranges)) &&
!is(CommonType!(staticMap!(ElementType, staticMap!(Unqual, Ranges))) == void))
cannot deduce template function from argument types !()(MapResult!(__lambda2,
Foo[]),string)
```

Fixes Issue 8367
http://d.puremagic.com/issues/show_bug.cgi?id=8367

https://github.com/D-Programming-Language/phobos/commit/ca44a116d5cad084fe1cb968f23c54059984a06e
Merge pull request #1047 from Poita/bug8367

Issue 8367 - Insufficient constraints for chain

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