forked from luna/jorts
61 lines
935 B
Text
61 lines
935 B
Text
import io
|
|
|
|
struct A {
|
|
int val1,
|
|
int val2
|
|
}
|
|
|
|
// self is injected and represents the struct A
|
|
// from the functions' definition
|
|
fn A:sum_fields() -> int {
|
|
self.val1 + self.val2
|
|
}
|
|
|
|
// type of sum_fields is:
|
|
// Func ([A] -> int)
|
|
|
|
// the mut keyword signals that self is a "reference"
|
|
// to self, instead of a copy
|
|
|
|
// however, what actually happens is that an instance of
|
|
// A is returned from the function implicitly
|
|
|
|
fn mut A:incr_both_fields() {
|
|
self.val1++
|
|
self.val2++
|
|
}
|
|
|
|
// and so, the type becomes:
|
|
// Func ([A] -> A)
|
|
|
|
fn mut A:incr_and_sum () {
|
|
self.val1++
|
|
self.val2++
|
|
|
|
self.val1 + self.val2
|
|
}
|
|
|
|
// type is:
|
|
// Func ([A] -> (A, int))
|
|
|
|
fn main () {
|
|
a := A{0, 0}
|
|
|
|
a.incr_both_fields()
|
|
|
|
/*
|
|
translates to:
|
|
a := incr_both_fields(a)
|
|
*/
|
|
|
|
sum := a.sum_fields()
|
|
io.puts(sum)
|
|
|
|
val = a.incr_and_sum()
|
|
|
|
/*
|
|
translates to:
|
|
a, val := incr_and_sum(a)
|
|
*/
|
|
}
|