feat(empirical): proof of concept for the Empirical lang

Author: vitallium

extension.toml

@@ -50,6 +50,10 @@ commit = "c70c1de07dedd532089c0c90835c8ed9fa694f5c"
 repository = "https://github.com/joker1007/tree-sitter-rbs"
 commit = "de893b166476205b09e79cd3689f95831269579a"
 
+[grammars.empirical]
+repository = "https://github.com/vitallium/tree-sitter-empirical"
+commit = "6a95f84161c0409eac5b667a1a2e5eb95e5cf787"
+
 [[capabilities]]
 kind = "process:exec"
 command = "gem"

languages/empirical/config.toml

@@ -0,0 +1,27 @@
+name = "Empirical"
+grammar = "empirical"
+path_suffixes = ["rb"]
+first_line_pattern = '^#!.*\bruby\b'
+line_comments = ["# "]
+autoclose_before = ";:.,=}])>"
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = true },
+    { start = "\"", end = "\"", close = true, newline = false, not_in = [
+        "comment",
+        "string",
+    ] },
+    { start = "'", end = "'", close = true, newline = false, not_in = [
+        "comment",
+        "string",
+    ] },
+]
+collapsed_placeholder = "# ..."
+tab_size = 2
+scope_opt_in_language_servers = ["tailwindcss-language-server"]
+word_characters = ["?", "!"]
+
+[overrides.string]
+completion_query_characters = ["-", "."]
+opt_into_language_servers = ["tailwindcss-language-server"]

languages/empirical/highlights.scm

@@ -0,0 +1,23 @@
+; Empirical-specific syntax highlighting
+; NOTE: Ruby base syntax is handled by the Ruby grammar
+; This file ONLY highlights Empirical extensions
+
+; EMPIRICAL: 'fun' keyword
+"fun" @keyword.function
+
+; EMPIRICAL: Function name in empirical_fun_method
+(empirical_fun_method
+  name: [(identifier) (constant)] @function.method)
+
+; EMPIRICAL: Type annotations in parameters
+(empirical_parameter
+  name: (identifier) @variable.parameter
+  type: (empirical_type) @type)
+
+; EMPIRICAL: Return type annotations
+(empirical_return_type
+  type: (empirical_type) @type)
+
+; EMPIRICAL: Generic type names (e.g., _Hash, _Array)
+(empirical_generic_type
+  name: (constant) @type.builtin)

languages/empirical/outline.scm

@@ -0,0 +1,23 @@
+; Empirical outline - show fun methods in document outline
+
+; EMPIRICAL: fun method definitions
+(empirical_fun_method
+  name: (identifier) @name) @item
+
+; EMPIRICAL: fun method with "fun" keyword as context
+(empirical_fun_method
+  "fun" @context
+  name: (identifier) @name) @item
+
+; EMPIRICAL: fun method in class/module context
+(class
+  (body_statement
+    (empirical_fun_method
+      "fun" @context
+      name: (identifier) @name) @item))
+
+(module
+  (body_statement
+    (empirical_fun_method
+      "fun" @context
+      name: (identifier) @name) @item))

languages/ruby/injections.scm

@@ -6,3 +6,12 @@
 ((regex
   (string_content) @content)
   (#set! "language" "regex"))
+
+; Empirical type system support
+(body_statement
+  (call
+    method: (identifier) @_name (#any-of? @_name "fun")
+    arguments: (_)
+  ) @content
+  (#set! "language" "empirical")
+)