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|
use syn::{
visit_mut::{visit_file_mut, visit_item_mod_mut, VisitMut},
File, Item, ItemMod,
};
pub(super) fn sort_semantically(file: &mut File) {
Visitor.visit_file_mut(file);
}
struct Visitor;
impl VisitMut for Visitor {
fn visit_file_mut(&mut self, file: &mut File) {
visit_items(&mut file.items);
visit_file_mut(self, file);
}
fn visit_item_mod_mut(&mut self, item_mod: &mut ItemMod) {
if let Some((_, ref mut items)) = item_mod.content {
visit_items(items);
}
visit_item_mod_mut(self, item_mod);
}
}
fn visit_items(items: &mut [Item]) {
items.sort_by_key(|item| match item {
Item::Type(_) => 0,
Item::Struct(_) => 1,
Item::Const(_) => 2,
Item::Fn(_) => 3,
Item::Enum(_) => 4,
Item::Union(_) => 5,
Item::Static(_) => 6,
Item::Trait(_) => 7,
Item::TraitAlias(_) => 8,
Item::Impl(_) => 9,
Item::Mod(_) => 10,
Item::Use(_) => 11,
Item::Verbatim(_) => 12,
Item::ExternCrate(_) => 13,
Item::ForeignMod(_) => 14,
Item::Macro(_) => 15,
_ => 18,
});
}
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