From fc34403018079ea053f26d0a31b7517053c7dd8c Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Thu, 13 Aug 2020 17:33:38 +0200
Subject: Rename ra_assists -> assists

---
 crates/assists/src/handlers/remove_mut.rs | 37 +++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 crates/assists/src/handlers/remove_mut.rs

(limited to 'crates/assists/src/handlers/remove_mut.rs')

diff --git a/crates/assists/src/handlers/remove_mut.rs b/crates/assists/src/handlers/remove_mut.rs
new file mode 100644
index 000000000..44f41daa9
--- /dev/null
+++ b/crates/assists/src/handlers/remove_mut.rs
@@ -0,0 +1,37 @@
+use syntax::{SyntaxKind, TextRange, T};
+
+use crate::{AssistContext, AssistId, AssistKind, Assists};
+
+// Assist: remove_mut
+//
+// Removes the `mut` keyword.
+//
+// ```
+// impl Walrus {
+//     fn feed(&mut<|> self, amount: u32) {}
+// }
+// ```
+// ->
+// ```
+// impl Walrus {
+//     fn feed(&self, amount: u32) {}
+// }
+// ```
+pub(crate) fn remove_mut(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
+    let mut_token = ctx.find_token_at_offset(T![mut])?;
+    let delete_from = mut_token.text_range().start();
+    let delete_to = match mut_token.next_token() {
+        Some(it) if it.kind() == SyntaxKind::WHITESPACE => it.text_range().end(),
+        _ => mut_token.text_range().end(),
+    };
+
+    let target = mut_token.text_range();
+    acc.add(
+        AssistId("remove_mut", AssistKind::Refactor),
+        "Remove `mut` keyword",
+        target,
+        |builder| {
+            builder.delete(TextRange::new(delete_from, delete_to));
+        },
+    )
+}
-- 
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