#4316: Interactive "do" notation in GHCi
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Reporter: mitar | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: GHCi | Version: 6.12.3
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by vivian):
Replying to [comment:6 igloo]:
> Not exactly the same as is being suggested, but this works in 7.0:
{{{Prelude Control.Monad.State> :{}}}
Personally, I could live with typing {{{:{}}} before a multiline GHCi
expression. Especially since (see above) I advocated the syntactic
'batch' versus semantic 'line at a time' reading.
However, I am working on libraries that provide matlab-like functionality
at the !programming-language interpreter! level of GHCi. Multiline "do"
statements are part of the Haskell specification (which the odd
mathematical _user_ might deign to peruse), whereas this "observe
formatting" GHCi meta-":" command is not standard.
There is a tension here between "users" and "programmers." The beauty of
Haskell includes a succinct and elegant syntax. So much so, that I
believe that we can blur the line when using GHCi between an applied
mathematics environment and a programming environment.
I'd like to see Haskell used by non-programmer mathematicians.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4316#comment:7>
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