error define a template haskell function -


i beginning learn template haskell, want create function receive string param define name function generate

build_p5 :: string -> [dec] build_p5 name = [ fund p1           [ clause [tupp [varp a,varp b]] (normalb (appe (vare c) (vare a))) [fund c [clause [varp a] (normalb (vare a)) []]]          ] ]    p1 = mkname name    = mkname "a"    b = mkname "b"    c = mkname "ident"

to run definition :

$(build_p5 "hola")

but when run program following error

couldn't match type ‘[dec]’ ‘q [dec]’ expected type: decsq   actual type: [dec] in expression: build_p5 "hola"

correct code

build_p2 :: monad m => string -> m [dec] build_p2 name = return [ fund p1       [ clause [tupp [varp a,varp b]] (normalb (appe (vare c) (vare a))) [fund c [clause [varp a] (normalb (vare a)) []]]      ]   ]   p1 = mkname name   = mkname "a"   b = mkname "b"   c = mkname "ident"


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