fragment-args-ktx: Remove default parameter implementations

Author: osipxd

fragment-args-ktx/CHANGELOG.md

@@ -1,5 +1,13 @@
 ## Unreleased
 
+### Changes
+
+- **Breaking change!**
+  Removed `default` parameters implementation from delegates to prevent mistakes when a value was not written before reading (#37).\
+  `IllegalStateException` will be thrown by default if you're trying to read a value that wasn't written before.
+  If you need to return the default value instead, specify the `default` parameter manually.
+- Added parameter `key: String` to `default` lambda. 
+
 ## [1.3.6-0] (2021-10-02)
 
 ### Changes

fragment-args-ktx/README.md

@@ -87,13 +87,7 @@ val index by arguments.int { 1 }
 val index by arguments.int(default = { 1 })
 ```
 
-All delegates of non-nullable types have `default` implementation by default:
-- numeric primitives - `0`
-- boolean - `false`
-- String and CharSequence - `""` (empty string)
-- non-nullable arrays - empty array
-- non-nullable lists - empty list
-- Serializable and Parcelable - throw `IllegalStateException("No default value specified")`
+> If you've not implemented `default` parameter, reading a value that wasn't written before will throw `IllegalStateException`.
 
 ## Contributing
 Merge requests are welcome.