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
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            LITERAL
              TRUE_KW "true"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          LOOP_EXPR
            LOOP_KW "loop"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          MATCH_EXPR
            MATCH_KW "match"
            WHITESPACE " "
            TUPLE_EXPR
              L_PAREN "("
              R_PAREN ")"
            WHITESPACE " "
            MATCH_ARM_LIST
              L_CURLY "{"
              R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          WHILE_EXPR
            WHILE_KW "while"
            WHITESPACE " "
            LITERAL
              TRUE_KW "true"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          FOR_EXPR
            FOR_KW "for"
            WHITESPACE " "
            WILDCARD_PAT
              UNDERSCORE "_"
            WHITESPACE " "
            IN_KW "in"
            WHITESPACE " "
            TUPLE_EXPR
              L_PAREN "("
              R_PAREN ")"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          BLOCK_EXPR
            STMT_LIST
              L_CURLY "{"
              R_CURLY "}"
        WHITESPACE "\n    "
        EXPR_STMT
          BLOCK_EXPR
            STMT_LIST
              L_CURLY "{"
              R_CURLY "}"
        WHITESPACE "\n    "
        MACRO_RULES
          MACRO_RULES_KW "macro_rules"
          BANG "!"
          WHITESPACE " "
          NAME
            IDENT "test"
          WHITESPACE " "
          TOKEN_TREE
            L_CURLY "{"
            WHITESPACE "\n         "
            TOKEN_TREE
              L_PAREN "("
              R_PAREN ")"
            WHITESPACE " "
            EQ "="
            R_ANGLE ">"
            WHITESPACE " "
            TOKEN_TREE
              L_CURLY "{"
              R_CURLY "}"
            WHITESPACE "\n    "
            R_CURLY "}"
        WHITESPACE "\n    "
        MACRO_CALL
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "test"
          BANG "!"
          TOKEN_TREE
            L_CURLY "{"
            R_CURLY "}"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"