add slint language support (#1054)

README.md

@@ -532,6 +532,7 @@ Svg
 Swift
 Swig
 SystemVerilog
+Slint
 Tact
 Tcl
 Tex

languages.json

@@ -1649,6 +1649,12 @@
       "quotes": [["\\\"", "\\\""]],
       "extensions": ["sv", "svh"]
     },
+    "Slint": {
+      "line_comment": ["//"],
+      "multi_line_comments": [["/*", "*/"]],
+      "quotes": [["\\\"", "\\\""]],
+      "extensions": ["slint"]
+    },
     "Tact": {
       "line_comment": ["//"],
       "multi_line_comments": [["/*", "*/"]],

tests/data/slint.slint

@@ -0,0 +1,26 @@
+// 26 lines 21 code 2 comments 3 blanks
+
+component MyButton inherits Text {
+    color: black;
+    // ...
+}
+
+export component MyApp inherits Window {
+    preferred-width: 200px;
+    preferred-height: 100px;
+    Rectangle {
+        width: 200px;
+        height: 100px;
+        background: green;
+
+    }/* */
+    MyButton { 
+        x:0;y:0;    // hello
+        text: "hello";
+    }
+    MyButton {  // world
+        y:0;
+        x: 50px;
+        text: "world";
+    }
+}