#2708: Error message should suggest UnboxedTuples language extension
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Reporter: tim | Owner:
Type: feature request | Status: new
Priority: low | Milestone: _|_
Component: Compiler (Parser) | Version: 6.9
Severity: minor | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown/Multiple
Os: Unknown/Multiple |
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Changes (by simonpj):
* priority: normal => low
* difficulty: => Unknown
* milestone: => _|_
Comment:
It would be better, yes. And usually I'm very keen to improve error
messages.
The reason we don't is that `-XUnboxedTuples` tells the ''lexical
analyser'' to recognise the lexemes `(#` and `#)`. The idea is not to
interfere with Haskell 98 when the extension is switched off.
For example `(# 3)` is a section in H98. So just seeing `(#` isn't enough
to say "I suggest you use `-XUnboxedTuples`".
So that's why it's tricky. I can't see an easy way to give you want you
ask.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2708#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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