SOURCE_FILE@0..27
  FN@0..26
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..6
      IDENT@3..6 "foo"
    PARAM_LIST@6..8
      L_PAREN@6..7 "("
      R_PAREN@7..8 ")"
    WHITESPACE@8..9 " "
    BLOCK_EXPR@9..26
      L_CURLY@9..10 "{"
      WHITESPACE@10..11 " "
      EXPR_STMT@11..24
        MACRO_CALL@11..23
          PATH@11..14
            PATH_SEGMENT@11..14
              NAME_REF@11..14
                IDENT@11..14 "try"
          BANG@14..15 "!"
          TOKEN_TREE@15..23
            L_PAREN@15..16 "("
            IDENT@16..18 "Ok"
            TOKEN_TREE@18..22
              L_PAREN@18..19 "("
              TOKEN_TREE@19..21
                L_PAREN@19..20 "("
                R_PAREN@20..21 ")"
              R_PAREN@21..22 ")"
            R_PAREN@22..23 ")"
        SEMICOLON@23..24 ";"
      WHITESPACE@24..25 " "
      R_CURLY@25..26 "}"
  WHITESPACE@26..27 "\n"