Corrected runtime bug and redundancy code in 'add_previous_characters…

…()' ^Cf 'i18n_lexer' crate. Completed implementation of 'Message' crate, and corrected all tests and examples affected by changes done.

CHANGELOG.asciidoc

@@ -3,13 +3,13 @@ Rizzen Yazston
 
 == i18n 0.6.0 (2023-03-??)
 
-WARNING: This update has many API breaking changes for many `i18n` crates.
+WARNING: This update has API breaking changes for some `i18n` crates.
 
 Breaking change is the result of changing how ICU data providers are used and passed to various components, thus many examples are affected even if the module is not affected by the ICU data provider change.
 
 * Added the `icu` crate:
 
-* Added `IcuDataProvider`, `DataProviderWrapper`, and `IcuError`.
+** Added `IcuDataProvider`, `DataProviderWrapper`, and `IcuError`.
 
 ** Added the `Cargo.toml`, license, and documentation.
 
@@ -23,15 +23,29 @@ Breaking change is the result of changing how ICU data providers are used and pa
 
 ** Added `LStringProviderSqlite3`, `AsLStringProviderSqlite3`, and its blanket implementation.
 
+** Removed the requirement of `RefCell` for `language_tag_registry` parameter and struct, as it was redundant.
+
 ** Updated tests, examples and documentation.
 
 * Updated the `i18n_lexer` crate:
 
+** Made `Lexer` struct private, made both `tokenise()` and `add_previous_characters()` methods as normal functions, removed `try_new` method and added `&Rc<IcuDataProvider>` to `tokenise()` function parameters.
+
+** Removed the `error.rs` as neither of the functions returns errors.
+
+** Updated the `lib.rs` to remove `error` module.
 
+** Updated `Cargo.toml`, tests, examples and documentation.
 
 * Updated the `i18n_pattern` crate:
 
+** Updated `Formatter` to use `IcuDataProvider`
+
+** Updated `Cargo.toml`, tests, examples and documentation.
+
+* Updated `i18n_lstring` crate:
 
+** Added `Clone` to `#[Derive()]` to allow cloning.
 
 * Added the `i18n_message` crate:
 

crates/lexer/README.asciidoc

@@ -66,19 +66,19 @@ features = [ "serde" ]
 
 ```
 use i18n_icu::IcuDataProvider;
-use i18n_lexer::{Token, TokenType, Lexer};
+use i18n_lexer::{Token, TokenType, tokenise};
 use icu_testdata::buffer;
 use icu_provider::serde::AsDeserializingBufferProvider;
 use std::rc::Rc;
 use std::error::Error;
 
-fn tokenise() -> Result<(), Box<dyn Error>> {
+fn test_tokenise() -> Result<(), Box<dyn Error>> {
  let buffer_provider = buffer();
  let data_provider = buffer_provider.as_deserializing();
- let icu_data_provider = IcuDataProvider::try_new( &data_provider )?;
- let mut lexer = Lexer::try_new( &Rc::new( icu_data_provider ) )?;
- let tokens = lexer.tokenise(
- "String contains a {placeholder}.", &vec![ '{', '}' ]
+ let tokens = tokenise(
+  "String contains a {placeholder}.",
+  &vec![ '{', '}' ],
+ &Rc::new( icu_data_provider ),
  );
  let mut grammar = 0;
  assert_eq!( tokens.0.iter().count(), 10, "Supposed to be a total of 10 tokens." );