egui_graph_edit/
index_impls.rs

1use super::*;
2
3macro_rules! impl_index_traits {
4    ($id_type:ty, $output_type:ty, $arena:ident) => {
5        impl<A, B, C> std::ops::Index<$id_type> for Graph<A, B, C> {
6            type Output = $output_type;
7
8            fn index(&self, index: $id_type) -> &Self::Output {
9                self.$arena.get(index).unwrap_or_else(|| {
10                    panic!(
11                        "{} index error for {:?}. Has the value been deleted?",
12                        stringify!($id_type),
13                        index
14                    )
15                })
16            }
17        }
18
19        impl<A, B, C> std::ops::IndexMut<$id_type> for Graph<A, B, C> {
20            fn index_mut(&mut self, index: $id_type) -> &mut Self::Output {
21                self.$arena.get_mut(index).unwrap_or_else(|| {
22                    panic!(
23                        "{} index error for {:?}. Has the value been deleted?",
24                        stringify!($id_type),
25                        index
26                    )
27                })
28            }
29        }
30    };
31}
32
33impl_index_traits!(NodeId, Node<A>, nodes);
34impl_index_traits!(InputId, InputParam<B, C>, inputs);
35impl_index_traits!(OutputId, OutputParam<B>, outputs);
egui_graph_edit/index_impls.rs

egui_graph_edit/
index_impls.rs
