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add List/sum and List/range built-ins #696

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add List/sum and List/range built-ins #696

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ae16b30
add List/sum and List/range built-ins
Sipher Aug 22, 2024
808bf11
Update src/fun/builtins.bend
Sipher Aug 23, 2024
e4dab27
Update src/fun/builtins.bend
Sipher Aug 23, 2024
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18 changes: 18 additions & 0 deletions src/fun/builtins.bend
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,24 @@ List/filter (List/Cons x xs) pred =
(List/filter xs pred)
}

## Recursively sums all elements in a list of native numbers.
# If the list is empty, returns 0.
# List/sum (xs: List(Number(a))) -> Number(a)
List/sum (List/Nil) = 0
List/sum (List/Cons x xs) = (+ x (List/sum xs))

# Generates a list of unsigned numbers starting from `start` and ending at `end` (inclusive).
# If the start value is greater than the end value, returns an empty list.
# List/range (start: u24, end: u24) -> (List u24)
List/range start end =
if (> start end) {
(List/Nil)
} else {
(List/Cons start (List/range (+ start 1) end))
}



# String/equals(s1: String, s2: String) -> u24
# Checks if two strings are equal.
String/equals (String/Nil) (String/Nil) = 1
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