28 Localization library [localization]

28.4 Standard locale categories [locale.categories]

28.4.6 The monetary category [category.monetary]

28.4.6.3 Class template moneypunct [locale.moneypunct]

28.4.6.3.2 Virtual functions [locale.moneypunct.virtuals]

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charT do_decimal_point() const;
1
#
Returns: The radix separator to use in case do_­frac_­digits() is greater than zero.277
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charT do_thousands_sep() const;
2
#
Returns: The digit group separator to use in case do_­grouping() specifies a digit grouping pattern.278
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string do_grouping() const;
3
#
Returns: A pattern defined identically as, but not necessarily equal to, the result of numpunct<charT>​::​​do_­grouping().279
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string_type do_curr_symbol() const;
4
#
Returns: A string to use as the currency identifier symbol.
[ Note
:
For specializations where the second template parameter is true, this is typically four characters long: a three-letter code as specified by ISO 4217 followed by a space.
— end note
 ]
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string_type do_positive_sign() const; string_type do_negative_sign() const;
5
#
Returns: do_­positive_­sign() returns the string to use to indicate a positive monetary value;280 do_­negative_­sign() returns the string to use to indicate a negative value.
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int do_frac_digits() const;
6
#
Returns: The number of digits after the decimal radix separator, if any.281
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pattern do_pos_format() const; pattern do_neg_format() const;
7
#
Returns: The specializations required in Table 103 ([locale.category]), namely
  • (7.1)
    moneypunct<char>,
  • (7.2)
    moneypunct<wchar_­t>,
  • (7.3)
    moneypunct<char, true>, and
  • (7.4)
    moneypunct<wchar_­t, true>,
return an object of type pattern initialized to { symbol, sign, none, value }.282
277)
In common U.S. locales this is '.'.
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278)
In common U.S. locales this is ','.
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279)
To specify grouping by 3s, the value is "\003" not "3".
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280)
This is usually the empty string.
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281)
In common U.S. locales, this is 2.
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282)
Note that the international symbol returned by do_­curr_­symbol() usually contains a space, itself; for example, "USD ".
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