fix: complete .let on block tail prefix expression

crates/ide-completion/src/completions/postfix.rs

@@ -16,7 +16,7 @@ use itertools::Itertools;
 use stdx::never;
 use syntax::{
  SmolStr,
- SyntaxKind::{EXPR_STMT, STMT_LIST},
+ SyntaxKind::{BLOCK_EXPR, EXPR_STMT, STMT_LIST},
  T, TextRange, TextSize, ToSmolStr,
  ast::{self, AstNode, AstToken},
  format_smolstr, match_ast,
@@ -155,7 +155,7 @@ pub(crate) fn complete_postfix(
  postfix_snippet("let", "let", &format!("let $1 = {receiver_text}"))
  .add_to(acc, ctx.db);
  }
- _ if matches!(second_ancestor.kind(), STMT_LIST | EXPR_STMT) => {
+ _ if matches!(second_ancestor.kind(), STMT_LIST | EXPR_STMT | BLOCK_EXPR) => {
  postfix_snippet("let", "let", &format!("let $0 = {receiver_text};"))
  .add_to(acc, ctx.db);
  postfix_snippet("letm", "let mut", &format!("let mut $0 = {receiver_text};"))
@@ -652,6 +652,87 @@ fn main() {
  baz.l$0
  res
 }
+"#,
+ expect![[r#"
+ sn box Box::new(expr)
+ sn call function(expr)
+ sn const const {}
+ sn dbg dbg!(expr)
+ sn dbgr dbg!(&expr)
+ sn deref *expr
+ sn if if expr {}
+ sn let let
+ sn letm let mut
+ sn match match expr {}
+ sn not !expr
+ sn ref &expr
+ sn refm &mut expr
+ sn return return expr
+ sn unsafe unsafe {}
+ sn while while expr {}
+ "#]],
+ );
+ check(
+ r#"
+fn main() {
+ &baz.l$0
+ res
+}
+"#,
+ expect![[r#"
+ sn box Box::new(expr)
+ sn call function(expr)
+ sn const const {}
+ sn dbg dbg!(expr)
+ sn dbgr dbg!(&expr)
+ sn deref *expr
+ sn if if expr {}
+ sn let let
+ sn letm let mut
+ sn match match expr {}
+ sn not !expr
+ sn ref &expr
+ sn refm &mut expr
+ sn return return expr
+ sn unsafe unsafe {}
+ sn while while expr {}
+ "#]],
+ );
+ }
+
+ #[test]
+ fn let_tail_block() {
+ check(
+ r#"
+fn main() {
+ baz.l$0
+}
+"#,
+ expect![[r#"
+ sn box Box::new(expr)
+ sn call function(expr)
+ sn const const {}
+ sn dbg dbg!(expr)
+ sn dbgr dbg!(&expr)
+ sn deref *expr
+ sn if if expr {}
+ sn let let
+ sn letm let mut
+ sn match match expr {}
+ sn not !expr
+ sn ref &expr
+ sn refm &mut expr
+ sn return return expr
+ sn unsafe unsafe {}
+ sn while while expr {}
+ "#]],
+ );
+
+ check(
+ r#"
+fn main() {
+ &baz.l$0
+}
 "#,
  expect![[r#"
  sn box Box::new(expr)

crates/ide-completion/src/tests/expression.rs

@@ -3268,6 +3268,8 @@ fn foo() {
  sn dbg dbg!(expr)
  sn dbgr dbg!(&expr)
  sn deref *expr
+ sn let let
+ sn letm let mut
  sn match match expr {}
  sn ref &expr
  sn refm &mut expr