Implement the . expression for the match opcode

Author: egli

src/translator.rs

@@ -805,4 +805,21 @@ mod tests {
         assert_eq!(table.translate("afoo"), "⠁⠄⠈⠈");
         assert_eq!(table.translate("afoob"), "⠁⠉⠂");
     }
+
+    #[test]
+    fn match_with_any_test() {
+        let rules = vec![
+            parse_rule("lowercase a 1"),
+            parse_rule("lowercase b 2"),
+            parse_rule("lowercase f 3"),
+            parse_rule("lowercase o 4"),
+            parse_rule("lowercase r 5"),
+            parse_rule("match . foo b 14"),
+        ];
+        let table = TranslationTable::compile(rules, Direction::Forward).unwrap();
+        assert_eq!(table.translate("foo"), "⠄⠈⠈");
+        assert_eq!(table.translate("afoo"), "⠁⠄⠈⠈");
+        assert_eq!(table.translate("afoob"), "⠁⠉⠂");
+        assert_eq!(table.translate("ffoob"), "⠄⠉⠂");
+    }
 }

src/translator/trie.rs

@@ -47,6 +47,9 @@ impl TrieNode {
         let lowercase = c.to_lowercase().next().unwrap();
         self.char_transition(lowercase)
     }
+    fn any_transition(&self) -> Option<&TrieNode> {
+        self.transitions.get(&Transition::Any)
+    }
     fn word_start_transition(&self) -> Option<&TrieNode> {
         self.transitions.get(&Transition::Start(Boundary::Word))
     }
@@ -237,15 +240,22 @@ impl Trie {
                     match_length + 1,
                     offset,
                 ));
-            }
-            if let Some(node) = node.char_case_insensitive_transition(c) {
+            } else if let Some(node) = node.char_case_insensitive_transition(c) {
                 matching_rules.extend(self.find_translations_from_node(
                     &input[bytes..],
                     Some(c),
                     node,
                     match_length + 1,
                     offset,
                 ));
+            } else if let Some(node) = node.any_transition() {
+                matching_rules.extend(self.find_translations_from_node(
+		    &input[bytes..],
+		    Some(c),
+		    node,
+		    match_length + 1,
+		    offset,
+                ));
             }
         }
         if let Some(node) = node.word_start_transition() {