Add async versions of function snippets for rust (#480)

Author: SKyletoft

snippets/rust-mode/afn

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: async fn name() { ... }
+# key: afn
+# --
+async fn ${1:name}($2) {
+    $0
+}

snippets/rust-mode/afnr

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: async fn name() -> Type { ... }
+# key: afnr
+# --
+async fn ${1:name}($2) -> ${3:Type} {
+    $0
+}

snippets/rust-mode/afns

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: async fn name(&self) -> Type  { ... }
+# key: afns
+# --
+async fn ${1:name}(${2:&self}) -> ${3:Type}  {
+    $0
+}

snippets/rust-mode/afnw

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: async fn name<T>(x: T) where T: Clone { ... }
+# key: afnw
+# --
+async fn ${1:name}<${2:T}>(${3:x: T}) where ${4:T: Clone} {
+    $0
+}

snippets/rust-mode/pafn

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: pub async fn name() { ... }
+# key: pafn
+# --
+pub async fn ${1:name}($2) {
+    $0
+}

snippets/rust-mode/pafnr

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: pub async fn name() -> Type { ... }
+# key: pafnr
+# --
+pub async fn ${1:name}($2) -> ${3:Type} {
+    $0
+}

snippets/rust-mode/pafns

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: pub async fn name(&self) -> Type  { ... }
+# key: pafns
+# --
+pub async fn ${1:name}(${2:&self}) -> ${3:Type} {
+    $0
+}

snippets/rust-mode/pafnw

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: pub async fn name<T>(x: T) where T: Clone { ... }
+# key: pafnw
+# --
+pub async fn ${1:name}<${2:T}>(${3:x: T}) where ${4:T: Clone} {
+    $0
+}