Keep source code order for module items

youknowone · youknowone · commit d54cfaf3f4e6 · 2020-10-19T18:21:04.000+09:00
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/derive/Cargo.toml b/derive/Cargo.toml
@@ -20,3 +20,4 @@ rustpython-bytecode = { path = "../bytecode", version = "0.1.1" }
 maplit = "1.0"
 once_cell = "1.3.1"
 textwrap = "0.12.1"
+indexmap = "^1"
diff --git a/derive/src/util.rs b/derive/src/util.rs
@@ -1,3 +1,4 @@
+use indexmap::map::IndexMap;
 use proc_macro2::{Span, TokenStream};
 use quote::{quote, ToTokens};
 use std::collections::HashMap;
@@ -18,7 +19,7 @@ pub(crate) const ALL_ALLOWED_NAMES: &[&str] = &[
 ];
 
 #[derive(Default)]
-pub(crate) struct ItemNursery(HashMap<(String, Vec<Attribute>), TokenStream>);
+pub(crate) struct ItemNursery(IndexMap<(String, Vec<Attribute>), TokenStream>);
 
 impl ItemNursery {
     pub fn add_item(
