feat(package): hemar: add indexes to tree-sitter

package/hemar/grammar/tree-sitter/grammar.js

@@ -4,15 +4,16 @@ module.exports = grammar({
   rules: {
     source_file: $ => repeat($.element),
 
-    element: $ => choice($.interpolation, $.segment, $.text),
+    element: $ => choice($.interpolation, $.segment, $.text, $.actual_bracket),
 
     interpolation: $ => seq("{[", $.path,  "]}"),
 
     segment:         $ => seq($.for, repeat($.element), $.done),
 
 
-    for:   $ => seq("{[", "for", $.string, "in", $.path, "]}"),
-    done:     $ => seq("{[", "done", "]}"),
+    for:                $ => seq("{[", "for", $.string, "in", $.path, "]}"),
+    done:               $ => seq("{[", "done", "]}"),
+    actual_bracket:     $ => seq("{[", "{[", "]}"),
     //include:         $ => seq("include", $.path),
     //call:            $ => seq("call", $.string, "in", $.language),
     //call_end:        $ => seq("end", $.string),
@@ -22,16 +23,34 @@ module.exports = grammar({
     path: $ => choice(
       ".",
       seq(
-        $.string,
-        repeat(seq(".", $.string)),
+        choice(
+          $.string,
+          $.index,
+        ),
+        repeat(seq(".", choice(
+          $.string,
+          $.index,
+        ))),
       ),
     ),
 
+    index: $ => seq(
+      '[',
+      choice(
+        /\d/,        
+        /[1-9]\d*/,  
+        /-[1-9]/,    
+        /-[1-9]\d*/  
+      ),
+      ']',
+    ),
+
     // anything but space
     string: $ => choice(
-      // no whitespace, ], \, ., "
-      token(prec(-1, /[^] .\\"]+/)),
+      // no whitespace, [, ], {, }, \, ., "
+      token(prec(-1, /[^]\[{} \n\t\r.\\"]+/)),
       // " ... " with "" = escaped "
+      // if you need json string rules (?:[^"\\\x00-\x1F]|\\["\\/bfnrt]|\\u[0-9A-Fa-f]{4})*
       token(prec(-1, /"([^"]|"")*"/)),
     ),