Merge pull request #21 from unicode-rs/fmt

Add Display impl for AugmentedScriptSet

Author: Manishearth

src/mixed_script.rs

@@ -105,6 +105,40 @@ impl Debug for AugmentedScriptSet {
     }
 }
 
+impl fmt::Display for AugmentedScriptSet {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if self.is_empty() {
+            write!(f, "Empty")?;
+        } else if self.is_all() {
+            write!(f, "All")?;
+        } else {
+            let mut first_entry = true;
+            let hanb = if self.hanb {
+                Some("Han with Bopomofo")
+            } else {
+                None
+            };
+            let jpan = if self.jpan { Some("Japanese") } else { None };
+            let kore = if self.kore { Some("Korean") } else { None };
+            for writing_system in None
+                .into_iter()
+                .chain(hanb)
+                .chain(jpan)
+                .chain(kore)
+                .chain(self.base.iter().map(Script::full_name))
+            {
+                if !first_entry {
+                    write!(f, ", ")?;
+                } else {
+                    first_entry = false;
+                }
+                write!(f, "{}", writing_system)?;
+            }
+        }
+        Ok(())
+    }
+}
+
 impl AugmentedScriptSet {
     /// Intersect this set with another
     pub fn intersect_with(&mut self, other: Self) {

src/tests.rs

@@ -79,7 +79,7 @@ fn test_potential_mixed_script_detection() {
 }
 
 #[test]
-fn test_augmented_script_set() {
+fn test_augmented_script_set_fmt_debug() {
     use crate::mixed_script::AugmentedScriptSet;
     let augmented_script_sets = vec![
         AugmentedScriptSet::default(),
@@ -114,3 +114,40 @@ fn test_augmented_script_set() {
         assert_eq!(format!("{:?}", ss), output);
     }
 }
+
+#[test]
+fn test_augmented_script_set_fmt_display() {
+    use crate::mixed_script::AugmentedScriptSet;
+    let augmented_script_sets = vec![
+        AugmentedScriptSet::default(),
+        AugmentedScriptSet::from('0'),
+        AugmentedScriptSet::from('a'),
+        AugmentedScriptSet::from('μ'),
+        AugmentedScriptSet::from('汉'),
+        AugmentedScriptSet::from('ひ'),
+        AugmentedScriptSet::from('カ'),
+        AugmentedScriptSet::from('한'),
+        AugmentedScriptSet::from("汉ひ"),
+        AugmentedScriptSet::from("汉a"),
+        AugmentedScriptSet::from("汉μ"),
+        AugmentedScriptSet::from("〆切"),
+    ];
+    let debug_output = vec![
+        "All",
+        "All",
+        "Latin",
+        "Greek",
+        "Han with Bopomofo, Japanese, Korean, Han",
+        "Japanese, Hiragana",
+        "Japanese, Katakana",
+        "Korean, Hangul",
+        "Japanese",
+        "Empty",
+        "Empty",
+        "Han with Bopomofo, Japanese, Korean, Han",
+    ];
+
+    for (ss, output) in augmented_script_sets.into_iter().zip(debug_output) {
+        assert_eq!(format!("{}", ss), output);
+    }
+}