add elisp support (helix-editor#10644)

* add elisp support

* update queries for some constants

book/src/generated/lang-support.md

@@ -42,6 +42,7 @@
 | edoc | ✓ |  |  |  |
 | eex | ✓ |  |  |  |
 | ejs | ✓ |  |  |  |
+| elisp | ✓ |  |  |  |
 | elixir | ✓ | ✓ | ✓ | `elixir-ls` |
 | elm | ✓ | ✓ |  | `elm-language-server` |
 | elvish | ✓ |  |  | `elvish` |

languages.toml

@@ -3641,6 +3641,20 @@ language-servers = ["pest-language-server"]
 name = "pest"
 source = { git = "https://github.com/pest-parser/tree-sitter-pest", rev = "a8a98a824452b1ec4da7f508386a187a2f234b85" }
 
+[[language]]
+name = "elisp"
+scope = "source.elisp"
+file-types = ["el"]
+comment-tokens = [";"]
+
+[language.auto-pairs]
+'(' = ')'
+'"' = '"'
+
+[[grammar]]
+name = "elisp"
+source = { git = "https://github.com/Wilfred/tree-sitter-elisp", rev = "e5524fdccf8c22fc726474a910e4ade976dfc7bb" }
+
 [[language]]
 name = "gjs"
 scope = "source.gjs"

runtime/queries/elisp/highlights.scm

@@ -0,0 +1,72 @@
+;; Special forms
+[
+  "and"
+  "catch"
+  "cond"
+  "condition-case"
+  "defconst"
+  "defvar"
+  "function"
+  "if"
+  "interactive"
+  "lambda"
+  "let"
+  "let*"
+  "or"
+  "prog1"
+  "prog2"
+  "progn"
+  "quote"
+  "save-current-buffer"
+  "save-excursion"
+  "save-restriction"
+  "setq"
+  "setq-default"
+  "unwind-protect"
+  "while"
+] @keyword
+
+;; Function definitions
+[
+ "defun"
+ "defsubst"
+ ] @keyword
+(function_definition name: (symbol) @function)
+(function_definition parameters: (list (symbol) @variable.parameter))
+(function_definition docstring: (string) @comment)
+
+;; Highlight macro definitions the same way as function definitions.
+"defmacro" @keyword
+(macro_definition name: (symbol) @function)
+(macro_definition parameters: (list (symbol) @variable.parameter))
+(macro_definition docstring: (string) @comment)
+
+(comment) @comment
+
+(integer) @constant.numeric.integer
+(float) @constant.numeric.float
+(char) @constant.character
+
+(string) @string
+
+[
+  "("
+  ")"
+  "#["
+  "["
+  "]"
+] @punctuation.bracket
+
+[
+  "`"
+  "#'"
+  "'"
+  ","
+  ",@"
+] @operator
+
+;; Highlight nil and t as constants, unlike other symbols
+[
+  "nil"
+  "t"
+] @constant.builtin

runtime/queries/elisp/tags.scm

@@ -0,0 +1,5 @@
+;; defun/defsubst
+(function_definition name: (symbol) @name) @definition.function
+
+;; Treat macros as function definitions for the sake of TAGS.
+(macro_definition name: (symbol) @name) @definition.function