#2338: unpack primitive types by default in data? and NOUNPACK?
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Reporter: Isaac Dupree | Owner:
Type: feature request | Status: new
Priority: low | Milestone: 7.4.1
Component: Compiler | Version: 6.8.2
Keywords: | Testcase:
Blockedby: | Difficulty: Unknown
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Changes (by dleuschner):
* cc: leuschner@… (added)
* failure: => None/Unknown
Comment:
I'd love this feature. Currently we've got 559 data type definitions with
more that 2800 fields in our project. Most fields are strict fields. We're
using -funbox-strict-fields because that's what we want for ~95% of our
strict fields. Sometimes we want boxed strict fields so we leave out the
strictness annotation in the data type but we then have to change all
"construction sites" to make sure that the field is strict. If we had {-#
NOUNPACK #-} we could leave the strictness annotation in place and still
get a boxed field. The other option, to explicitly unbox all of our >2800
data constructor fields is not very appealing.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2338#comment:10>
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