Make unicode support optional (off by default)

.github/workflows/rust.yml

@@ -18,10 +18,15 @@ jobs:
         toolchain: 1.32
         default: true
         profile: minimal
-    - name: Build
+    - name: Build default
       uses: actions-rs/cargo@v1
       with:
         command: build
+    - name: Build with unicode segmentation on
+      uses: actions-rs/cargo@v1
+      with:
+        args: --features unicode
+        command: build
     # Use stable for other jobs
     - uses: actions-rs/toolchain@v1
       with:

Cargo.toml

@@ -12,5 +12,9 @@ keywords = ["string", "case", "camel", "snake", "unicode"]
 readme = "README.md"
 include = ["src/**/*", "LICENSE-*", "README.md", "CHANGELOG.md"]
 
+[features]
+default = []
+unicode = ["unicode-segmentation"]
+
 [dependencies]
-unicode-segmentation = "1.2.0"
+unicode-segmentation = { version = "1.2.0", optional = true }

src/kebab.rs

@@ -64,6 +64,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "shouty-snake-case");
     t!(test7: "snake_case" => "snake-case");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "this-contains-all-kinds-of-word-boundaries");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "xσxς-baffle");
     t!(test10: "XMLHttpRequest" => "xml-http-request");
 }

src/lib.rs

@@ -62,7 +62,15 @@ pub use upper_camel::{
 
 use std::fmt;
 
-use unicode_segmentation::UnicodeSegmentation;
+#[cfg(feature = "unicode")]
+fn get_iterator(s: &str) -> unicode_segmentation::UnicodeWords {
+    use unicode_segmentation::UnicodeSegmentation;
+    s.unicode_words()
+}
+#[cfg(not(feature = "unicode"))]
+fn get_iterator(s: &str) -> impl Iterator<Item = &str> {
+    s.split(|letter: char| !letter.is_ascii_alphanumeric())
+}
 
 fn transform<F, G>(
     s: &str,
@@ -96,7 +104,7 @@ where
 
     let mut first_word = true;
 
-    for word in s.unicode_words() {
+    for word in get_iterator(s) {
         let mut char_indices = word.char_indices().peekable();
         let mut init = 0;
         let mut mode = WordMode::Boundary;

src/lower_camel.rs

@@ -78,6 +78,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "shoutySnakeCase");
     t!(test7: "snake_case" => "snakeCase");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "thisContainsAllKindsOfWordBoundaries");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "xσxςBaffle");
     t!(test10: "XMLHttpRequest" => "xmlHttpRequest");
     // TODO unicode tests

src/shouty_kebab.rs

@@ -65,6 +65,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "SHOUTY-SNAKE-CASE");
     t!(test7: "snake_case" => "SNAKE-CASE");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "THIS-CONTAINS-ALL-KINDS-OF-WORD-BOUNDARIES");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "XΣXΣ-BAFFLE");
     t!(test10: "XMLHttpRequest" => "XML-HTTP-REQUEST");
     t!(test11: "SHOUTY-KEBAB-CASE" => "SHOUTY-KEBAB-CASE");

src/shouty_snake.rs

@@ -79,6 +79,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "SHOUTY_SNAKE_CASE");
     t!(test7: "snake_case" => "SNAKE_CASE");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "THIS_CONTAINS_ALL_KINDS_OF_WORD_BOUNDARIES");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "XΣXΣ_BAFFLE");
     t!(test10: "XMLHttpRequest" => "XML_HTTP_REQUEST");
 }

src/snake.rs

@@ -77,6 +77,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "shouty_snake_case");
     t!(test7: "snake_case" => "snake_case");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "this_contains_all_kinds_of_word_boundaries");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "xσxς_baffle");
     t!(test10: "XMLHttpRequest" => "xml_http_request");
     t!(test11: "FIELD_NAME11" => "field_name11");

src/title.rs

@@ -65,6 +65,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "Shouty Snake Case");
     t!(test7: "snake_case" => "Snake Case");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "This Contains All Kinds Of Word Boundaries");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "Xσxς Baffle");
     t!(test10: "XMLHttpRequest" => "Xml Http Request");
 }

src/upper_camel.rs

@@ -78,6 +78,7 @@ mod tests {
     t!(test6: "SHOUTY_SNAKE_CASE" => "ShoutySnakeCase");
     t!(test7: "snake_case" => "SnakeCase");
     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "ThisContainsAllKindsOfWordBoundaries");
+    #[cfg(feature = "unicode")]
     t!(test9: "XΣXΣ baffle" => "XσxςBaffle");
     t!(test10: "XMLHttpRequest" => "XmlHttpRequest");
 }