Add index getter to Variant (#110)

* Add index getter to Variant

* Update comment.

* Update release notes and CHANGELOG

CHANGELOG.md

@@ -7,7 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.9.2] - 2021-07-09
+### Added
+
+- Add index getter to Variant [(#110)](https://github.com/paritytech/scale-info/pull/110)
+
 ## [0.9.1] - 2021-07-06
+### Fixed
 
 - Option constructor macro hygiene [(#108)](https://github.com/paritytech/scale-info/pull/108)
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "scale-info"
-version = "0.9.1"
+version = "0.9.2"
 authors = ["Parity Technologies <[email protected]>"]
 edition = "2018"
 

src/ty/variant.rs

@@ -230,6 +230,11 @@ where
         &self.fields
     }
 
+    /// Returns the index of the variant, if specified.
+    pub fn index(&self) -> Option<u8> {
+        self.index
+    }
+
     /// Returns the discriminant of the variant.
     pub fn discriminant(&self) -> Option<u64> {
         self.discriminant