add cangjie language support (#1127) (#1128)

* add cangjie language definition

* add test file cangjie.cj

Co-authored-by: Chengxiang Liu <chengxiang@qcraft.ai>

languages.json

@@ -174,6 +174,15 @@
       "multi_line_comments": [["{-", "-}"]],
       "extensions": ["cabal"]
     },
+    "Cangjie": {
+      "line_comment": ["//"],
+      "multi_line_comments": [["/*", "*/"]],
+      "nested": true,
+      "quotes": [["\\\"", "\\\""],["\\\"\\\"\\\"", "\\\"\\\"\\\""]],
+      "verbatim_quotes": [["#\\\"", "\\\"#"],["##\\\"", "\\\"##"],["###\\\"", "\\\"###"],
+        ["#'", "'#"],["##'", "'##"],["###'", "'###"]],
+      "extensions": ["cj"]
+    },
     "Cassius": {
       "line_comment": ["//"],
       "multi_line_comments": [["/*", "*/"]],

tests/data/cangjie.cj

@@ -0,0 +1,50 @@
+/* 50 lines 34 code 8 comments 8 blanks */
+
+/* /* we can nest block*/ comments in cangjie */
+main(): Unit {
+    let start: String = "/*"
+
+    var x: Int64 = 1
+    x += 2 // end of line comment */
+}
+
+func foo(): Unit {
+    let esc: String = "\"/*escaped quotes in a string and block comment*/\"";
+    let next_line: String = """
+		*/ /*string on new line
+		continued to another line
+		bar();
+		*/"
+"""
+
+    /* Block comment
+    // line comment in a block comment
+    end block comment*/
+    let late_start: String = // "
+        ##"wow\
+		that's pretty neat"##
+
+    let late_start2: String = /* " */
+        "*/ still just a string" // but this is a line comment
+}
+
+func foobar(): Unit {
+    let a: Int64 = 4 // /*
+    let b: Int64 = 5
+    let c: Int64 = 6 // */
+}
+
+/* \
+ / comment
+\*/
+struct Point {
+    let x: Int64
+    let y: Int64
+    let z: Int64
+
+    public init(x: Int64, y: Int64, z: Int64) {
+        this.x = x
+        this.y = y
+        this.z = z
+    }
+}