#3906: Regular expressions don't return multiple results.
-------------------------------+--------------------------------------------
Reporter: choenerzs | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries (other)
Version: 6.12.1 | Keywords: regex, multiple results
Os: Linux | Testcase:
Architecture: x86_64 (amd64) | Failure: None/Unknown
-------------------------------+--------------------------------------------
Regular expressions can not return multiple results anymore. This worked
with 6.10.x (I think it was 6.10).
Test case:
{{{
ghci
:m Text.Regex.Posix
"acba" =~ "a" :: (Int,Int) -- returns (0,1)
"acba" =~ "a" :: [(Int,Int)] -- or [String] or whatever
}}}
results in:
{{{
No instance for (RegexContext Regex [Char] [(Int, Int)])
arising from a use of `=~' at <interactive>:1:0-12
Possible fix:
add an instance declaration for
(RegexContext Regex [Char] [(Int, Int)])
In the expression: "acba" =~ "a" :: [(Int, Int)]
In the definition of `it': it = "acba" =~ "a" :: [(Int, Int)]
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3906>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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