“Assinatura da função Haskell” Respostas de código

Assinatura da função Haskell

-- three degrees of polymoprhism in type signature 
foo ::           a    -- any / all types, i.e. parametrically polymorphic | typically used when argument is any type/typeclass
bar :: Show a => a    -- some types, i.e. ad-hoc polymorphic | typically used when argument is typeclass
qux ::           Bool -- one type, i.e. monomorphic | typicaly used when argument is primitive type