Add tree-sitter-regex

This might be interesting for injected highlighting

README.md

@@ -180,6 +180,7 @@ List of currently supported languages:
 - [ ] yaml
 - [ ] nix
 - [ ] markdown
+- [x] regex (maintained by @theHamsta)
 
 ## Troubleshooting
 Before doing anything run `:checkhealth nvim_treesitter`. This will help you find where the bug might come from.

lua/nvim-treesitter/configs.lua

@@ -203,6 +203,13 @@ parsers.nix = {
   }
 }
 
+parsers.regex = {
+    install_info = {
+        url = "https://github.com/tree-sitter/tree-sitter-regex",
+        files = { "src/parser.c" }
+    }
+}
+
 -- @enable can be true or false
 -- @disable is a list of languages, only relevant if enable is true
 -- @keymaps list of user mappings for a given module if relevant

queries/regex/highlights.scm

@@ -0,0 +1,29 @@
+;; Forked from tree-sitter-regex
+;; The MIT License (MIT) Copyright (c) 2014 Max Brunsfeld
+[
+ "("
+ ")"
+ "(?"
+ "(?:"
+ "(?<"
+ ">"
+ "["
+ "]" 
+ "{" 
+ "}"
+] @punctuation.bracket
+
+(group_name) @property
+
+[
+ (identity_escape)
+ (control_letter_escape)
+ (character_class_escape)
+ (control_escape)
+ (start_assertion)
+ (end_assertion)
+ (boundary_assertion)
+ (non_boundary_assertion)
+] @escape
+
+[ "*" "+" "|" "=" "<=" "!" "<!" ] @operator