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const std = @import("std");
pub const Entity = struct {
id: usize,
};
pub const EntityCollection = struct {
allocator: std.mem.Allocator,
next_id: usize,
entities: std.AutoHashMap(usize, Entity),
pub fn addEntity(self: *EntityCollection) !usize {
try self.entities.put(self.next_id, .{
.id = self.next_id,
});
self.next_id += 1;
return self.next_id - 1;
}
pub fn init(allocator: std.mem.Allocator) EntityCollection {
return .{
.allocator = allocator,
.next_id = 0,
.entities = std.AutoHashMap(usize, Entity).init(allocator),
};
}
pub fn deinit(self: *EntityCollection) void {
self.entities.deinit();
}
};
test "create entities" {
try std.testing.expect(true);
var ec = EntityCollection.init(std.testing.allocator);
defer ec.deinit();
for (0..128) |i| {
const id = ec.addEntity();
try std.testing.expectEqual(i, id);
}
}
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