The following issue has been SUBMITTED. ====================================================================== https://www.austingroupbugs.net/view.php?id=1413 ====================================================================== Reported By: philip-guenther Assigned To: ====================================================================== Project: Issue 8 drafts Issue ID: 1413 Category: Shell and Utilities Type: Error Severity: Objection Priority: normal Status: New Name: Philip Guenther Organization: OpenBSD User Reference: Section: printf's APPLICATION USAGE Page Number: 3038 Line Number: 102845 - 102848 Final Accepted Text: ====================================================================== Date Submitted: 2020-10-24 22:01 UTC Last Modified: 2020-10-24 22:01 UTC ====================================================================== Summary: incorrect description of how a hexadecimal character constant can be terminated in ISO C Description: The text says:
> In the ISO C standard, the "##" concatenation > operator can be used to terminate a constant and follow it with a hexadecimal character to be > written. In the shell, concatenation occurs before the printf utility has a chance to parse the end > of the hexadecimal constant. The ## operator is neither necessary nor sufficient. All that's needed is use of string literal concatenation. Indeed, this was an example in (at least) drafts of the C99 standard, in the specification of string literals lexical elements: # EXAMPLE This pair of adjacent character string literals # # "\x12" "3" # # produces a single character string literal containing the two characters whose values are '\x12' and '3', # because escape sequences are converted into single members of the execution character set just prior to # adjacent string literal concatenation. Desired Action: Replace the sentence: In the ISO C standard, the "##" concatenation operator can be used to terminate a constant and follow it with a hexadecimal character to be written. With something like: In the ISO C standard, the constant and its following hexadecimal character can be placed in separate string literals as escape sequence processing occurs before string literal concatenation. (I'm not really happy with that phrasing; better suggestions welcome!) ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 2020-10-24 22:01 philip-guentherNew Issue 2020-10-24 22:01 philip-guentherName => Philip Guenther 2020-10-24 22:01 philip-guentherOrganization => OpenBSD 2020-10-24 22:01 philip-guentherSection => printf's APPLICATION USAGE 2020-10-24 22:01 philip-guentherPage Number => 3038 2020-10-24 22:01 philip-guentherLine Number => 102845 - 102848 ======================================================================
