verion 0.3.0

1. [feature] EnumxFrom and IntoEnumx, uniform enum exchange methods.
2. [refactoring] Rename `Exchange` trait as `EnumX`.
3. [refactoring] Remove syntax support for `throws`.
4. [feature] Generialized logging support.
5. [doc] Doc test cases added.

README.md

@@ -1,6 +1,10 @@
 # Purpose
 
-This is a proof of concept project aiming at implementing anonymous enum and "checked exception" like error handling in Rust via proc-macro.
+This is a proof of concept project aiming at
+
+- Structural enum inplemented enum exchange.
+
+- Applying enum exchange with the special interest in error-handling.
 
 Four crates categorized into the fowllowing sub projects:
 

cex/Cargo.toml

@@ -1,19 +1,23 @@
 [package]
 name = "cex"
-version = "0.3.0-alpha"
+version = "0.3.0"
 authors = ["oooutlk <oooutlk@outlook.com>"]
 license = "MIT"
-keywords = [ "exception", "error", "throw", "throws", "ad-hoc" ]
+keywords = [ "exception", "error", "throws", "log", "backtrace" ]
 readme = "README.md"
 repository = "https://github.com/oooutlk/enumx"
 documentation = "https://docs.rs/cex"
 categories = [ "rust-patterns" ]
 edition = "2018"
-description = "Checked exception in Rust."
+description = "Combinators of EnumX, for error-handling"
 
 [dependencies]
-enumx = "^0.3.0-alpha"
+enumx = "0.3"
+failure = { version = "0.1", optional = true }
 
 [dev-dependencies]
-enumx_derive = "^0.3.0-alpha"
-cex_derive = "^0.3.0-alpha"
+enumx_derive = "0.3"
+cex_derive = "0.3"
+
+[features]
+dyn_err = ["failure"]