Add outline.scm file to enable search buffer symbols

Author: lungarella-raffaele

languages/rescript/outline.scm

@@ -0,0 +1,76 @@
+; Let declarations, e.g. `let foo = 42`
+(let_declaration
+  ["let" "export"] @context
+  (let_binding
+    pattern: (_) @name) @item)
+
+; Recursive let declarations, e.g. `let rec fib = n => ...`
+(let_declaration
+  ["let" "export"] @context
+  "rec" @context
+  (let_binding
+    pattern: (_) @name) @item)
+
+; Type declarations, e.g. `type t = int`
+(type_declaration
+  "type" @context
+  (type_binding
+    name: (_) @name) @item)
+
+; Recursive type declarations, e.g. `type rec tree<'a> = ...`
+(type_declaration
+  "type" @context
+  "rec" @context
+  (type_binding
+    name: (_) @name) @item)
+
+; Exported type declarations, e.g. `export type t = int`
+(type_declaration
+  "export" @context
+  "type" @context
+  (type_binding
+    name: (_) @name) @item)
+
+; Module declarations, e.g. `module Foo = { ... }`
+(module_declaration
+  "module" @context
+  (module_binding
+    name: (_) @name) @item)
+
+; Recursive module declarations, e.g. `module rec Foo = { ... }`
+(module_declaration
+  "module" @context
+  "rec" @context
+  (module_binding
+    name: (_) @name) @item)
+
+; Module type declarations, e.g. `module type S = { ... }`
+(module_declaration
+  "module" @context
+  "type" @context
+  (module_binding
+    name: (_) @name) @item)
+
+; External declarations, e.g. `external log: string => unit = "console.log"`
+(external_declaration
+  "external" @context
+  (value_identifier) @name) @item
+
+; Exception declarations, e.g. `exception NotFound`
+(exception_declaration
+  "exception" @context
+  (variant_identifier) @name) @item
+
+; Open statements, e.g. `open Belt`
+(open_statement
+  "open" @context
+  (_) @name) @item
+
+; Include statements, e.g. `include React.Component`
+(include_statement
+  "include" @context
+  (_) @name) @item
+
+; Variant declarations inside type bodies, e.g. `Foo | Bar(int)`
+(variant_declaration
+  (variant_identifier) @name) @item