#1877: Change the meaning of -fextended-default-rules
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Reporter: simonmar | Owner:
Type: task | Status: new
Priority: normal | Milestone: 6.10 branch
Component: GHCi | Version: 6.8.1
Severity: normal | Keywords:
Difficulty: Unknown | Testcase:
Architecture: Unknown | Os: Unknown
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Currently `-fextended-default-rules` applies to source code modules. GHCi
has the extended defaulting behaviour by default for expressions typed at
the prompt, and there's no way to change that.
We propose the following change: extended defaulting would only ever apply
to expressions typed at the GHCi prompt, and it would be disabled with
`-fno-extended-default-rules` (on by default).
See also #1200, where `-fextended-default-rules` was introduced.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1877>
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