SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          PREFIX_EXPR
            STAR "*"
            PREFIX_EXPR
              STAR "*"
              REF_EXPR
                AMP "&"
                LITERAL
                  INT_NUMBER "1"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          PREFIX_EXPR
            BANG "!"
            PREFIX_EXPR
              BANG "!"
              LITERAL
                TRUE_KW "true"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          PREFIX_EXPR
            MINUS "-"
            PREFIX_EXPR
              MINUS "-"
              LITERAL
                INT_NUMBER "1"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
