Guarantee return type isn't const

[twin prairie]

I'm tired of having to spam @constCast() everywhere because the return type of a function is assumed to be const. Is there a way to guarantee the return type is mutable and not const?

[odd parcel]

what's an example of a @constCast you're using?

i don't quite understand your question. types, and therefore return types, don't have an inherent constness.

[odd parcel]

what's the definition of widgets.Container?

[twin prairie]

pub fn Container(alloc: *std.mem.Allocator) protocol.NestedFrame {
    return .{.children = std.ArrayList(protocol.NestedFrame).init(alloc.*), .callbacks = .{.event_handler = @constCast(&event_handler_container)}};
}

[odd parcel]

ah you're talking about temporary values

you should just save it in a local var

[twin prairie]

pub const NestedFrame = struct {
    x: u32 = 0,
    y: u32 = 0,
    x_size: u32 = 0,
    y_size: u32 = 0,
    id: u64 = 0,
    children: std.ArrayList(NestedFrame),
    callbacks: FrameCallbacks,
};

[twin prairie]

I like doing a lot in one line, e.g. method chaining

[odd parcel]

can event_handler_container be changed from const to var?

[twin prairie]

It's a function pointer

[remote yarrow]

Well zig does not support method chaining very well

[odd parcel]

then the .event_handler in callbacks should be const so that you do not need @constCast

[twin prairie]

https://tenor.com/view/fade-away-oooooooooooo-aga-emoji-crumble-gif-20008708