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3 changed files with 10 additions and 11 deletions
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@ -301,7 +301,7 @@ evidence that a disjunction holds.
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We set the precedence of disjunction so that it binds less tightly
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than any other declared operator.
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\begin{code}
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infix 1 _⊎_
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infixr 1 _⊎_
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\end{code}
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Thus, `A × C ⊎ B × C` parses as `(A × C) ⊎ (B × C)`.
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@ -389,7 +389,7 @@ simplify to the same term, and similarly for `inj₂ y`.
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We set the precedence of disjunction so that it binds less tightly
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than any other declared operator:
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```
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infix 1 _⊎_
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infixr 1 _⊎_
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```
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Thus, `A × C ⊎ B × C` parses as `(A × C) ⊎ (B × C)`.
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@ -115,12 +115,11 @@ _++_ : ∀ {A : Set} → List A → List A → List A
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[] ++ ys = ys
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(x ∷ xs) ++ ys = x ∷ (xs ++ ys)
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```
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The type `A` is an implicit argument to append, making it a
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_polymorphic_ function (one that can be used at many types). The
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empty list appended to another list yields the other list. A
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non-empty list appended to another list yields a list with head the
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same as the head of the first list and tail the same as the tail of
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the first list appended to the second list.
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The type `A` is an implicit argument to append, making it a _polymorphic_
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function (one that can be used at many types). A list appended to the empty list
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yields the list itself. A list appended to a non-empty list yields a list with
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the head the same as the head of the non-empty list, and a tail the same as the
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other list appended to tail of the non-empty list.
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Here is an example, showing how to compute the result
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of appending two lists:
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