remove 'pure' method from Arrow class
The Arrow class as originally defined by John Hughes had methods arr, >>> and first. (>>> has since been moved by #1773 (closed) to the Category class.) When writing the Fun of Programming paper, I added pure as a synonym for arr, because Richard Bird preferred it. However this name hasn't caught on, and now it clashes with a method in the Applicative class, so I propose to remove it.
The usual practice would be to deprecate the name in one release and remove it in the following one, but I propose to remove it in one step because
- no-one seems to be using this name, and
- backward compatibility has been broken anyway by the Category split (#1773 (closed)).
The only people who will be bitten by the change are those who import Control.Arrow hiding pure, and they wouldn't be warned by deprecation.
Trac metadata
| Trac field | Value |
|---|---|
| Version | |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | Unknown |
| Architecture | Unknown |