[WIP] support smol

Author: rgbkrk

.github/workflows/main-ci.yml

@@ -59,6 +59,11 @@ jobs:
         with:
           command: test
           args: --all --no-default-features --features async-std-runtime,all-transport
+      - name: Test smol version
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --all --no-default-features --features smol-runtime,all-transport
 
   fmt:
     name: Formatting

Cargo.toml

@@ -12,6 +12,7 @@ rust-version = "1.62.0"
 default = ["tokio-runtime", "all-transport"]
 tokio-runtime = ["tokio", "tokio-util"]
 async-std-runtime = ["async-std"]
+smol-runtime = ["smol"]
 all-transport = ["ipc-transport", "tcp-transport"]
 ipc-transport = []
 tcp-transport = []
@@ -26,13 +27,17 @@ async-trait = "0.1"
 parking_lot = "0.12"
 rand = "0.8"
 bytes = "1"
+smol = { version = "0.3.2", optional = true }
 tokio = { version = "1", features = ["full"], optional = true }
 tokio-util = { version = "0.7", features = ["compat"], optional = true }
 num-traits = "0.2"
 dashmap = "5"
 crossbeam-queue = "0.3"
 uuid = { version = "1", features = ["v4"] }
-regex = { version = "1", default-features = false, features = ["std", "unicode-perl"] }
+regex = { version = "1", default-features = false, features = [
+    "std",
+    "unicode-perl",
+] }
 once_cell = "1"
 log = "0.4"
 asynchronous-codec = "0.7"