Add support for menhir (OCaml parser generator)

lockfile.json

@@ -227,6 +227,9 @@
   "ocamllex": {
     "revision": "ac1d5957e719d49bd6acd27439b79843e4daf8ed"
   },
+  "menhir": {
+    "revision": "db7953acb0d5551f207373c81fa07a57d7b085cb"
+  },
   "org": {
     "revision": "698bb1a34331e68f83fc24bdd1b6f97016bb30de"
   },

lua/nvim-treesitter/parsers.lua

@@ -471,6 +471,15 @@ list.ocamllex = {
   maintainers = { "@undu" },
 }
 
+list.menhir = {
+  install_info = {
+    url = "https://github.com/Kerl13/tree-sitter-menhir",
+    files = { "src/parser.c", "src/scanner.cc" },
+  },
+  maintainers = { "@Kerl13" },
+  filetype = "menhir",
+}
+
 list.org = {
   install_info = {
     url = "https://github.com/milisims/tree-sitter-org",

queries/menhir/highlights.scm

@@ -0,0 +1,29 @@
+["%parameter" "%token" "%type" "%start" "%attribute" "%left" "%right" "%nonassoc" "%public" "%inline" "%prec"] @keyword
+["%on_error_reduce"] @exception
+
+["let"] @keyword.function
+
+[(equality_symbol) ":" "|" ";" ","] @punctuation.delimiter
+
+["=" "~" "_"] @operator
+(modifier) @operator
+
+["<" ">" "{" "}" "%{" "%}" "%%"] @punctuation.special
+
+["(" ")"] @punctuation.bracket
+
+(old_rule [(symbol)] @function)
+(new_rule [(lid)] @function)
+
+(precedence [(symbol)] @parameter)
+
+(funcall) @function.call
+
+; Not very accurant but does a decent job
+(uid) @constant
+
+(ocaml_type) @type
+(ocaml) @none
+
+[(comment) (line_comment) (ocaml_comment)] @comment
+(ERROR) @error

queries/menhir/injections.scm

@@ -0,0 +1 @@
+(ocaml) @ocaml