Difference between revisions of "Cum definim operatorii binari ?"
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va calcula tot : suma 3 4 adica 3 + 4 cf. def. de sus. |
va calcula tot : suma 3 4 adica 3 + 4 cf. def. de sus. |
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Latest revision as of 04:18, 14 August 2021
Ca pe orice functie binara, dar numele ei il veti scrie punind numele operatorului in paranteza rotunda.
Ex:
suma :: Int -> Int -> Int suma a b = a + b
poate deveni
(+++) :: Int -> Int -> Int (+++) a b = a + b
iar cu o declaratie infix precizati asociativitatea si nivelul de prioritate al operatorului.
Varianta: puteti folosi o functie binara obisnuita ca un operator infixat punandu-i numele intre `apostroafe inverse`.
Ex:
3 `suma` 4
va calcula tot : suma 3 4 adica 3 + 4 cf. def. de sus.