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04eb0cce55
fn max[T](T a, T b) -> T struct Stack[T] { []T items } fn Stack[T].push(T x)
The type is worked out from the arguments (max(3, 4), first([1, 2])) and written out
where it cannot be: max[float](1, 2.5), Stack[int](), Pair[str, int](...). Each use makes
its own copy, so a generic costs nothing at run time. Several parameters
(Pair[A, B]), nesting (Stack[Pair[int, str]]), methods, and printing (Stack[int](items: ...))
work. An error inside a generic says which version it was building.
boot.sh: 37 passed, 0 failed (stage 2 and 3 identical).
15 lines
206 B
Text
15 lines
206 B
Text
// expect: (while building bigger[Point])
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struct Point {
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int x
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}
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fn bigger[T](T a, T b) -> T {
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if a > b {
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return a
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}
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return b
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}
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fn main() {
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print(bigger(Point(1), Point(2)))
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}
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