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Fix update might change an element no longer in the queue

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This commit is contained in:
Zander Khan 2021-01-16 18:11:26 +00:00
parent 4600b489a6
commit c6986f29f9
2 changed files with 2 additions and 2 deletions
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2
lib/std/priority_dequeue.zig
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@ -389,7 +389,7 @@ pub fn PriorityDequeue(comptime T: type) type {
}
pub fn update(self: *Self, elem: T, new_elem: T) !void {
var old_index: usize = std.mem.indexOfScalar(T, self.items, elem) orelse return error.ElementNotFound;
var old_index: usize = std.mem.indexOfScalar(T, self.items[0 .. self.len - 1], elem) orelse return error.ElementNotFound;
_ = self.removeIndex(old_index);
self.addUnchecked(new_elem);
}

2
lib/std/priority_queue.zig
View File

@ -199,7 +199,7 @@ pub fn PriorityQueue(comptime T: type) type {
}
pub fn update(self: *Self, elem: T, new_elem: T) !void {
var update_index: usize = std.mem.indexOfScalar(T, self.items, elem) orelse return error.ElementNotFound;
var update_index: usize = std.mem.indexOfScalar(T, self.items[0 .. self.len - 1], elem) orelse return error.ElementNotFound;
const old_elem: T = self.items[update_index];
self.items[update_index] = new_elem;
if (self.compareFn(new_elem, old_elem)) {