#1126: Add Data.String, containing IsString(fromString), to base
----------------------------+-----------------------------------------------
Reporter: igloo | Owner:
Type: proposal | Status: closed
Priority: normal | Milestone: Not GHC
Component: libraries/base | Version: 6.6
Severity: normal | Resolution: fixed
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Changes (by igloo):
* resolution: => fixed
* status: new => closed
Comment:
David Roundy proposed adding Eq as a requirement for the IsString class so
pattern matching wouldn't need an Eq constraint, but Lennart Augustsson
pointed out that you may wish to use IsString types for which Eq cannot be
(usefully) defined, such as an AST type he has.
Neil Mitchell asked about adding a toString function to the class. Lennart
Augustsson pointed out that Num has fromInteger but not toInteger.
Presumably toString too could not be usefully defined for his AST type.
Applied:
{{{
* Add Data.String, containing IsString(fromString); trac proposal #1126
This is used by the overloaded strings extension (-foverloaded-strings in
GHC).
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1126>
GHC <http://www.haskell.org/ghc/>
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