SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            BREAK_EXPR
              BREAK_KW "break"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          WHILE_EXPR
            WHILE_KW "while"
            WHITESPACE " "
            BREAK_EXPR
              BREAK_KW "break"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          FOR_EXPR
            FOR_KW "for"
            WHITESPACE " "
            IDENT_PAT
              NAME
                IDENT "i"
            WHITESPACE " "
            IN_KW "in"
            WHITESPACE " "
            BREAK_EXPR
              BREAK_KW "break"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        MATCH_EXPR
          MATCH_KW "match"
          WHITESPACE " "
          BREAK_EXPR
            BREAK_KW "break"
          WHITESPACE " "
          MATCH_ARM_LIST
            L_CURLY "{"
            R_CURLY "}"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
