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possibly incorrect indentation or mismatched brackets

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  possibly incorrect indentation or mismatched brackets meInvent bbird <jobmattcon@gmail.com> - 2016-07-18 02:30 -0700
    Re: possibly incorrect indentation or mismatched brackets Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-18 15:20 +0100
      Re: possibly incorrect indentation or mismatched brackets meInvent bbird <jobmattcon@gmail.com> - 2016-07-18 20:29 -0700

#384 — possibly incorrect indentation or mismatched brackets

in ghci, run code below , it can run without error

but after put in file test.hs

then :l test.hs

got error

Prelude> :l trees.hs
[1 of 1] Compiling Main             ( trees.hs, interpreted )
    parse error (possibly incorrect indentation or mismatched brackets)
Failed, modules loaded: none.


import Data.List
import Control.Monad
import Math.Combinat
import System.IO
import Data.Map (Map)
import qualified Data.Map as Map

let allparams = replicateM 2 [0.0, 1.0]
let a1 = [0.0, 1.0, 1.0, 1.0]
let a2 = [0.0, 0.0, 0.0, 1.0]
let a3 = [1.0, 1.0, 0.0, 1.0]

op1 :: Map (Double, Double) Double
op1 = Map.fromList [((allparams!!i!!0, allparams!!i!!1), a1!!i) | i <- [0..3] ] 

op2 :: Map (Double, Double) Double
op2 = Map.fromList [((allparams!!i!!0, allparams!!i!!1), a2!!i) | i <- [0..3] ] 

op3 :: Map (Double, Double) Double
op3 = Map.fromList [((allparams!!i!!0, allparams!!i!!1), a3!!i) | i <- [0..3] ] 

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#385

meInvent bbird <jobmattcon@gmail.com> writes:

> in ghci, run code below , it can run without error

It's complicated.  There are two forms of let.  One is an expression and
has in 'in' part:

  let x = 42 in x*x

The other appears in do blocks and list comprehensions and just
introduced a new binding.  This is the form you are using when you type
let at ghci.

> but after put in file test.hs
>
> then :l test.hs
>
> got error
>
> Prelude> :l trees.hs
> [1 of 1] Compiling Main             ( trees.hs, interpreted )
>     parse error (possibly incorrect indentation or mismatched brackets)
> Failed, modules loaded: none.
>
>
> import Data.List
> import Control.Monad
> import Math.Combinat
> import System.IO
> import Data.Map (Map)
> import qualified Data.Map as Map
>
> let allparams = replicateM 2 [0.0, 1.0]
> let a1 = [0.0, 1.0, 1.0, 1.0]
> let a2 = [0.0, 0.0, 0.0, 1.0]
> let a3 = [1.0, 1.0, 0.0, 1.0]

These should be top-level definitions (i.e. just remove the let
keyword).

<snip>
-- 
Ben.

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#387

thanks , after remove let , it succeed to run

On Monday, July 18, 2016 at 10:20:12 PM UTC+8, Ben Bacarisse wrote:
> meInvent bbird <jobmattcon@gmail.com> writes:
> 
> > in ghci, run code below , it can run without error
> 
> It's complicated.  There are two forms of let.  One is an expression and
> has in 'in' part:
> 
>   let x = 42 in x*x
> 
> The other appears in do blocks and list comprehensions and just
> introduced a new binding.  This is the form you are using when you type
> let at ghci.
> 
> > but after put in file test.hs
> >
> > then :l test.hs
> >
> > got error
> >
> > Prelude> :l trees.hs
> > [1 of 1] Compiling Main             ( trees.hs, interpreted )
> >     parse error (possibly incorrect indentation or mismatched brackets)
> > Failed, modules loaded: none.
> >
> >
> > import Data.List
> > import Control.Monad
> > import Math.Combinat
> > import System.IO
> > import Data.Map (Map)
> > import qualified Data.Map as Map
> >
> > let allparams = replicateM 2 [0.0, 1.0]
> > let a1 = [0.0, 1.0, 1.0, 1.0]
> > let a2 = [0.0, 0.0, 0.0, 1.0]
> > let a3 = [1.0, 1.0, 0.0, 1.0]
> 
> These should be top-level definitions (i.e. just remove the let
> keyword).
> 
> <snip>
> -- 
> Ben.

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