Popularity

3.6

Declining

Activity

0.0

Stable

Stars 7

Watchers 3

Forks 0

Last Commit about 10 years ago

Monthly Downloads: 30

Programming language: Haskell

License: BSD 3-clause "New" or "Revised" License

Tags: Control Strict

Latest version: v0.1.0.0

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9.6 5.9 strict-identity VS classy-prelude

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9.6 4.1 strict-identity VS free

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9.6 2.7 strict-identity VS capability

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9.6 0.0 strict-identity VS record

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9.6 5.9 strict-identity VS classy-prelude-yesod

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9.6 0.0 strict-identity VS freer-simple

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9.5 3.4 strict-identity VS safe-exceptions

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9.5 0.0 strict-identity VS extensible-effects

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9.5 0.0 strict-identity VS auto

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9.5 4.3 strict-identity VS these

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9.5 3.9 strict-identity VS unliftio

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9.4 0.0 strict-identity VS ComonadSheet

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9.4 1.6 strict-identity VS retry

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9.4 5.6 strict-identity VS abstract-par

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README

About

strict-identity package is meant to make writing nested strict let expression heavy code a bit more pleasant, for all those High Performance Haskell lib authors out there.

A simple example of the strict identity monad in action (and working wonderfully) is the following bit fiddling code, which generates C competitive assembly on both major GHC backends, -fasm and -fllvm

(>>) = unsafeShiftR
(<<) = unsafeShiftL
outerShuffle64A :: Word -> Word 
outerShuffle64A !x =
    runStrictIdentity $! do
        x <- return $! ((x .&. 0x00000000FFFF0000) << 16 )
            .|. ((x>>16) .&. 0x00000000FFFF0000) .|. (x .&. 0xFFFF00000000FFFF)
        x <-  return $! ((x .&. 0x0000FF000000FF00 ) <<  8 )
            .|. (x >> 8) .&. 0x0000FF000000FF00 .|. (x  .&. 0xFF0000FFFF0000FF)
        x<-  return $! (( x .&. 0x00F000F000F000F0 ) << 4 )
            .|. (x >> 4) .&. 0x00F000F000F000F0 .|. (x .&. 0xF00FF00FF00FF00F )
        x<-   return $!((x .&.  0x0C0C0C0C0C0C0C0C )<< 2 )
            .|. (x >> 2) .&. 0x0C0C0C0C0C0C0C0C .|.( x .&. 0xC3C3C3C3C3C3C3C3)
        x<-   return $! ( (x .&. 0x2222222222222222)  << 1 ) 
            .|. (x>> 1) .&. 0x2222222222222222 .|. (x .&. 0x9999999999999999)
        return x

strict-identity

strict identity monad, handy for writing high performance strict code sanely

strict-identity alternatives and similar packages

Popular Comparisons

README

About