nvim-treesitter/queries/rust/indents.scm

[
  (mod_item)
  (struct_item)
  (enum_item)
  (impl_item)
  (for_expression)
  (struct_expression)
  (match_expression)
  (tuple_expression)
  (match_arm)
  (if_let_expression)
  (call_expression)
  (assignment_expression)
  (arguments)
  (block)
  (where_clause)
  (use_list)
] @indent

[
  "where"
  "("
  ")"
  "["
  "]"
  "{"
  "}"
] @branch