//ww:run-exit 53
package main;
type capture = struct { content: str, start: size, end: size };
type t = struct { pc: size, cap: capture };
fn copycap(ts: *[]t, i: size, src: capture) void = {
	(*ts)[i].cap = src;
};
fn derefcap(ts: *[]t, i: size, pc: *capture) void = {
	(*ts)[i].cap = *pc;
};
export fn main() i32 = {
	let z: capture = capture { content = "", start = 0, end = 0 };
	let ts: []t = [];
	append(ts, t { pc = 7, cap = z });
	append(ts, t { pc = 8, cap = z });
	let a: capture = capture { content = "ab", start = 1, end = 3 };
	copycap(&ts, 1, a);
	if (ts[1].cap.content.len != 2) { return 1; };
	if (ts[1].cap.start != 1) { return 2; };
	if (ts[1].cap.end != 3) { return 3; };
	let b: capture = capture { content = "wxyz", start = 5, end = 9 };
	derefcap(&ts, 0, &b);
	if (ts[0].cap.content.len != 4) { return 4; };
	if (ts[0].cap.start != 5) { return 5; };
	if (ts[0].cap.end != 9) { return 6; };
	if (ts[1].cap.start != 1) { return 7; };
	return 53;
};