double specifier for do_get()Section: 28.3.4.3.2.3 [facet.num.get.virtuals] Status: TC1 Submitter: Dietmar Kühl Opened: 1999-07-20 Last modified: 2016-01-28
Priority: Not Prioritized
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Discussion:
The table in paragraph 7 for the length modifier does not list the length
modifier l to be applied if the type is double. Thus, the
standard asks the implementation to do undefined things when using scanf()
(the missing length modifier for scanf() when scanning doubles
is actually a problem I found quite often in production code, too).
Proposed resolution:
In 28.3.4.3.2.3 [facet.num.get.virtuals], paragraph 7, add a row in the Length
Modifier table to say that for double a length modifier
l is to be used.
Rationale:
The standard makes an embarrassing beginner's mistake.