Preliminary fix of dotenvy attribute to work with async_std

dotenvy-macros/src/lib.rs

@@ -71,9 +71,9 @@ pub fn load(attr: TokenStream, item: TokenStream) -> TokenStream {
         // this works with `tokio::main`` but not `async_std::main``
         quote! {
             // non-async wrapper function
-            #vis fn #fn_name() #output {
+            #vis async fn #fn_name() #output {
                 #load_env
-                #new_fn_name()
+                #new_fn_name().await
             }
 
             // orig async function, but renamed

examples/async-std-dotenvy/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "async-std-dotenvy"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+async-std = { version = "1.12.0", features = ["attributes"] }
+dotenvy = { path = "../../dotenvy" }

examples/async-std-dotenvy/src/main.rs

@@ -0,0 +1,5 @@
+#[async_std::main]
+#[dotenvy::load]
+async fn main() {
+    println!("Hello, world!");
+}

examples/tokio-dotenvy/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "tokio-dotenvy"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+dotenvy = { path = "../../dotenvy" }
+tokio = { version = "1", features = ["macros", "rt", "rt-multi-thread"]}

examples/tokio-dotenvy/src/main.rs

@@ -0,0 +1,5 @@
+#[tokio::main]
+#[dotenvy::load]
+async fn main() {
+    println!("hello world")
+}

rust-toolchain.toml

@@ -0,0 +1 @@
+toolchain.channel = "nightly"