yesodweb/hamlet — Issue #28: recognise all possible $foo tags, error on unsupported ones
Author: gregwebs
Created: 2011-11-19 16:14:43+00:00
State: open

as suggested in the google group: http://groups.google.com/group/yesodweb/browse_thread/thread/abfe006a1573be9d/3ed101295c7fca16?lnk=gst&q=hamlet+foo#3ed101295c7fca16

``` html

$for al <- allAuthLevels

${show al}
```

However, that fails because it should be $forall, not $for, which causes
the later use of `al' to be undefined.

If this were to fail due to $for being unrecognised, that would be much
better, because it means that version n+m of hamlet files would fail to
compile on version n of hamlet when a new directive has been added. (ie.
better forward compatibility).