SOURCE_FILE@0..33
  FN@0..32
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..7
      IDENT@3..7 "main"
    PARAM_LIST@7..9
      L_PAREN@7..8 "("
      R_PAREN@8..9 ")"
    WHITESPACE@9..10 " "
    BLOCK_EXPR@10..32
      L_CURLY@10..11 "{"
      WHITESPACE@11..16 "\n    "
      LET_STMT@16..30
        LET_KW@16..19 "let"
        WHITESPACE@19..20 " "
        MACRO_PAT@20..25
          MACRO_CALL@20..25
            PATH@20..21
              PATH_SEGMENT@20..21
                NAME_REF@20..21
                  IDENT@20..21 "m"
            BANG@21..22 "!"
            TOKEN_TREE@22..25
              L_PAREN@22..23 "("
              IDENT@23..24 "x"
              R_PAREN@24..25 ")"
        WHITESPACE@25..26 " "
        EQ@26..27 "="
        WHITESPACE@27..28 " "
        LITERAL@28..29
          INT_NUMBER@28..29 "0"
        SEMICOLON@29..30 ";"
      WHITESPACE@30..31 "\n"
      R_CURLY@31..32 "}"
  WHITESPACE@32..33 "\n"