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### 836. Effects of `money_base::space` and `money_base::none` on `money_get`

Section: 28.4.7.2.2 [locale.money.get.virtuals] Status: C++11 Submitter: Martin Sebor Opened: 2008-05-17 Last modified: 2016-01-28

Priority: Not Prioritized

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Duplicate of: 670

Discussion:

In paragraph 2, 28.4.7.2.2 [locale.money.get.virtuals] specifies the following:

> Where `space` or `none` appears in the format pattern, except at the end, optional white space (as recognized by `ct.is`) is consumed after any required space.

This requirement can be (and has been) interpreted two mutually exclusive ways by different readers. One possible interpretation is that:

> 1. where `money_base::space` appears in the format, at least one space is required, and
> 2. where `money_base::none` appears in the format, space is allowed but not required.

The other is that:

> where either `money_base::space` or `money_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 clear that the last sentence would be helpful, even if the word were not missing:

> > In either case, any required MISSINGWORD followed by all optional whitespace (as recognized by `ct.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 first interpretation is intended, that is, to make following change to 28.4.7.2.2 [locale.money.get.virtuals], p. 2:

> When `money_base::space` or `money_base::none` appears as the last element in the format pattern, except at the end, optional white space (as recognized by `ct.is`) is consumed after any required space. no white space is consumed. Otherwise, where `money_base::space` appears in any of the initial elements of the format pattern, at least one white space character is required. Where `money_base::none` appears in any of the initial elements of the format pattern, white space is allowed but not required. If `(str.flags() & str.showbase)` is `false`, ...