Submitter: Derek Jones (UK)
Submission Date: 2000-04-11
Reference Document: N/A
Date: 2001-01-29 01:00:05
Subject: Enumerated type rank.
An enumerated type may have a rank equal to that of int, or even greater than int.
The wording in this paragraph does not allow an object having an enumerated type equal to that of int to appear wherever an object of type int or unsigned int may appear.
Suggested Technical Corrigendum
Changing the existing wording to:
An object or expression with an integer type whose integer conversion rank is less than or equal to the rank of int and unsigned int.solves the issue, for enumerators, at this point.
A more general solution for enumerations is to add the wording:
An enumerated type with integer conversion rank not less than the rank of int and unsigned int may be used in an expression wherever the compatible signed or unsigned integer may be; the enumerated type is converted to the compatible type. These conversions are also called integer promotions.
Integer conversion rank does not address enums that rank equal to int.
The words "or equal to" should be added, but there is another issue regarding enum and whether or not it can ever be greater in rank than int (or unsigned int) since the constant-expressions for the initializers are constrained to the range of values that may be expressed by an int. The words of the simple proposed change are good. The more general proposal doesn't seem to fix anything else.
In 18.104.22.168 paragraph 2, change the first bullet to:
An object or expression with an integer type whose integer conversion rank is less than or equal to the rank of int and unsigned int.
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