Efficent lens operation for Data.Map et al.

[roconnor at theorem.ca]

On Wed, 18 Jan 2012, Johan Tibell wrote:

> IIRC you just replace the current functions with yours and run make in
> the benchmarks/ directory to compile the benchmark binaries (which use
> Criterion). Then simply run them.

I got an error trying to build the benchmarks:

$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.12.3

$ make
ghc -DTESTING -cpp -O2 -fregs-graph -rtsopts --make -fforce-recomp -i.. -o 
bench-Map Map.hs
[1 of 7] Compiling Data.StrictPair  ( ../Data/StrictPair.hs, ../Data/StrictPair.o )
[2 of 7] Compiling Data.Set         ( ../Data/Set.hs, ../Data/Set.o )
[3 of 7] Compiling Data.Map.Base    ( ../Data/Map/Base.hs, ../Data/Map/Base.o )
[4 of 7] Compiling Data.Map.Lazy    ( ../Data/Map/Lazy.hs, ../Data/Map/Lazy.o )
[5 of 7] Compiling Data.Map.Strict  ( ../Data/Map/Strict.hs, ../Data/Map/Strict.o )
[6 of 7] Compiling Data.Map         ( ../Data/Map.hs, ../Data/Map.o )
[7 of 7] Compiling Main             ( Map.hs, Map.o )
Linking bench-Map ...
ghc -DTESTING -cpp -O2 -fregs-graph -rtsopts --make -fforce-recomp -i.. -o bench-Set Set.hs
[1 of 2] Compiling Data.Set         ( ../Data/Set.hs, ../Data/Set.o )
[2 of 2] Compiling Main             ( Set.hs, Set.o )
Linking bench-Set ...
ghc -DTESTING -cpp -O2 -fregs-graph -rtsopts --make -fforce-recomp -i.. -o bench-IntMap IntMap.hs

../Data/IntMap/Base.hs:195:44: parse error on input `#'
make: *** [bench-IntMap] Error 1


Any tips on how to proceed?

-- 
Russell O'Connor                                      <http://r6.ca/>
``All talk about `theft,''' the general counsel of the American Graphophone
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