From c99fca1f2d247f46f6a9082a9b482b16a86077e9 Mon Sep 17 00:00:00 2001
From: A4-Tacks <wdsjxhno1001@163.com>
Date: Sat, 31 Jan 2026 05:46:06 +0800
Subject: [PATCH] feat: fallback let postfix completions in condition

Easy to input other patterns, or bind variable in let-chain

Example
---
```rust
fn main() {
    let bar = 2;
    if bar.$0
}
```

**Before this PR**

No complete 'let'

**After this PR**

```rust
fn main() {
    let bar = 2;
    if let $1 = bar
}
```
---
 .../ide-completion/src/completions/postfix.rs | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs b/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
index 7f67ef848ece..4b244c9025a5 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/completions/postfix.rs
@@ -151,6 +151,10 @@ pub(crate) fn complete_postfix(
                     .add_to(acc, ctx.db);
                 }
             },
+            _ if is_in_cond => {
+                postfix_snippet("let", "let", &format!("let $1 = {receiver_text}"))
+                    .add_to(acc, ctx.db);
+            }
             _ if matches!(second_ancestor.kind(), STMT_LIST | EXPR_STMT) => {
                 postfix_snippet("let", "let", &format!("let $0 = {receiver_text};"))
                     .add_to(acc, ctx.db);
@@ -744,6 +748,25 @@ fn main() {
         );
     }
 
+    #[test]
+    fn iflet_fallback_cond() {
+        check_edit(
+            "let",
+            r#"
+fn main() {
+    let bar = 2;
+    if bar.$0
+}
+"#,
+            r#"
+fn main() {
+    let bar = 2;
+    if let $1 = bar
+}
+"#,
+        );
+    }
+
     #[test]
     fn option_letelse() {
         check_edit(