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doc: word smith tutorial

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Lysxia 2020-03-21 19:13:36 -04:00
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src/Generic/Random/Tutorial.hs
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@ -19,11 +19,13 @@
-- arbitrary = 'genericArbitrary' (9 '%' 8 '%' ())
-- @
--
-- @arbitrary :: 'Test.QuickCheck.Gen' (Tree a)@ picks a @Leaf@ with probability 9\/17, or a
-- That random generator @arbitrary :: 'Test.QuickCheck.Gen' (Tree a)@ picks a
-- @Leaf@ with probability 9\/17, or a
-- @Node@ with probability 8\/17, and recursively fills their fields with
-- @arbitrary@.
--
-- For @Tree@, 'genericArbitrary' produces code equivalent to the following:
-- For @Tree@, the generic implementation 'genericArbitrary' is equivalent to
-- the following:
--
-- @
-- 'genericArbitrary' :: Arbitrary a => 'Weights' (Tree a) -> Gen (Tree a)
@ -43,7 +45,7 @@
--
-- The list of weights is built up with the @('%')@ operator as a cons, and using
-- the unit @()@ as the empty list, in the order corresponding to the data type
-- definition. The uniform distribution can be obtained with 'uniform'.
-- definition.
--
-- == Uniform distribution
--