Movatterモバイル変換

This page is a snapshot from the LWG issues list, see theLibrary Active Issues List for more information and the meaning ofC++11 status.

836. Effects ofmoney_base::space andmoney_base::none onmoney_get

Section: 28.3.4.7.2.3[locale.money.get.virtuals]Status:C++11Submitter: Martin SeborOpened: 2008-05-17Last modified: 2016-01-28

Priority:Not Prioritized

View all otherissues in [locale.money.get.virtuals].

View all issues withC++11 status.

Duplicate of:670

Discussion:

In paragraph 2, 28.3.4.7.2.3[locale.money.get.virtuals] specifies the following:

Wherespace ornone appears in the formatpattern, except at the end, optional white space (as recognizedbyct.is) is consumed after any required space.

This requirement can be (and has been) interpreted two mutuallyexclusive ways by different readers. One possible interpretationis that:

1. wheremoney_base::space appears in the format, at leastone space is required, and
2. wheremoney_base::none appears in the format, space isallowed but not required.

The other is that:

where eithermoney_base::space ormoney_base::none appears in the format, white space is optional.

[San Francisco:]

Martin will revise the proposed resolution.

[2009-07 Frankfurt:]

There is a noun missing from the proposed resolution. It's not clearthat the last sentence would be helpful, even if the word were notmissing:

In either case, any required MISSINGWORD followed by all optional whitespace (as recognized byct.is()) is consumed.

Strike this sentence and move to Review.

[Howard: done.]

[2009-10 Santa Cruz:]

Move to Ready.

Proposed resolution:

I propose to change the text to make it clear that the firstinterpretation is intended, that is, to make following change to28.3.4.7.2.3[locale.money.get.virtuals], p. 2:

Whenmoney_base::spaceormoney_base::none appearsas the lastelementin the format pattern,except at the end, optionalwhite space (as recognized byct.is) is consumed afterany required space.no white space is consumed. Otherwise,wheremoney_base::space appears in any of the initialelements of the format pattern, at least one white space character isrequired. Wheremoney_base::none appears in any of theinitial elements of the format pattern, white space is allowed but notrequired.If(str.flags() & str.showbase) isfalse, ...