util: implement JoinMap

.cargo/config

@@ -0,0 +1,2 @@
+# [build]
+# rustflags = ["--cfg", "tokio_unstable"]

README.md

@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.17.0", features = ["full"] }
+tokio = { version = "1.18.0", features = ["full"] }
 ```
 Then, on your main.rs:
 

tokio-util/Cargo.toml

@@ -29,13 +29,12 @@ codec = ["tracing"]
 time = ["tokio/time","slab"]
 io = []
 io-util = ["io", "tokio/rt", "tokio/io-util"]
-rt = ["tokio/rt", "tokio/sync", "futures-util"]
+rt = ["tokio/rt", "tokio/sync", "futures-util", "hashbrown"]
 
 __docs_rs = ["futures-util"]
 
 [dependencies]
-tokio = { version = "1.6.0", path = "../tokio", features = ["sync"] }
-
+tokio = { version = "1.18.0", path = "../tokio", features = ["sync"] }
 bytes = "1.0.0"
 futures-core = "0.3.0"
 futures-sink = "0.3.0"
@@ -45,6 +44,9 @@ pin-project-lite = "0.2.0"
 slab = { version = "0.4.4", optional = true } # Backs `DelayQueue`
 tracing = { version = "0.1.25", default-features = false, features = ["std"], optional = true }
 
+[target.'cfg(tokio_unstable)'.dependencies]
+hashbrown = { version = "0.12.0", optional = true }
+
 [dev-dependencies]
 tokio = { version = "1.0.0", path = "../tokio", features = ["full"] }
 tokio-test = { version = "0.4.0", path = "../tokio-test" }