28 Text processing library [text]

Returns: do_get(s, end, intl, f, err, quant).

Effects: Reads characters from s to parse and construct a monetary value according to the format specified by a moneypunct<charT, Intl> facet reference mp and the character mapping specified by a ctype<charT> facet reference ct obtained from the locale returned by str.getloc(), and str.flags().

If a valid sequence is recognized, does not change err; otherwise, sets err to (err|str.failbit), or (err|str.failbit|str.eofbit) if no more characters are available, and does not change units or digits.

Uses the pattern returned by mp.neg_format() to parse all values.

The result is returned as an integral value stored in units or as a sequence of digits possibly preceded by a minus sign (as produced by ct.widen(c) where c is '-' or in the range from '0' through '9' (inclusive)) stored in digits.

If mp.grouping() indicates that no thousands separators are permitted, any such characters are not read, and parsing is terminated at the point where they first appear.

Otherwise, thousands separators are optional; if present, they are checked for correct placement only after all format components have been read.

Where money_base​::​space or money_base​::​none appears as the last element in the format pattern, no whitespace is consumed.

Otherwise, where money_base​::​space appears in any of the initial elements of the format pattern, at least one whitespace character is required.

Where money_base​::​none appears in any of the initial elements of the format pattern, whitespace is allowed but not required.

If (str.flags() & str.showbase) is false, the currency symbol is optional and is consumed only if other characters are needed to complete the format; otherwise, the currency symbol is required.

If the first character (if any) in the string pos returned by mp.positive_sign() or the string neg returned by mp.negative_sign() is recognized in the position indicated by sign in the format pattern, it is consumed and any remaining characters in the string are required after all the other format components.

If pos or neg is empty, the sign component is optional, and if no sign is detected, the result is given the sign that corresponds to the source of the empty string.

Otherwise, the character in the indicated position must match the first character of pos or neg, and the result is given the corresponding sign.

If the first character of pos is equal to the first character of neg, or if both strings are empty, the result is given a positive sign.

Digits in the numeric monetary component are extracted and placed in digits, or into a character buffer buf1 for conversion to produce a value for units, in the order in which they appear, preceded by a minus sign if and only if the result is negative.

The value units is produced as if by233 for (int i = 0; i < n; ++i) buf2[i] = src[find(atoms, atoms+sizeof(src), buf1[i]) - atoms]; buf2[n] = 0; sscanf(buf2, "%Lf", &units); where n is the number of characters placed in buf1, buf2 is a character buffer, and the values src and atoms are defined as if by static const char src[] = "0123456789-"; charT atoms[sizeof(src)]; ct.widen(src, src + sizeof(src) - 1, atoms);

Returns: An iterator pointing immediately beyond the last character recognized as part of a valid monetary quantity.

Returns: do_put(s, intl, f, loc, quant).

Effects: Writes characters to s according to the format specified by a moneypunct<charT, Intl> facet reference mp and the character mapping specified by a ctype<charT> facet reference ct obtained from the locale returned by str.getloc(), and str.flags().

The argument units is transformed into a sequence of wide characters as if by ct.widen(buf1, buf1 + sprintf(buf1, "%.0Lf", units), buf2) for character buffers buf1 and buf2.

If the first character in digits or buf2 is equal to ct.widen('-'), then the pattern used for formatting is the result of mp.neg_format(); otherwise the pattern is the result of mp.pos_format().

Digit characters are written, interspersed with any thousands separators and decimal point specified by the format, in the order they appear (after the optional leading minus sign) in digits or buf2.

In digits, only the optional leading minus sign and the immediately subsequent digit characters (as classified according to ct) are used; any trailing characters (including digits appearing after a non-digit character) are ignored.

Calls str.width(0).

Returns: An iterator pointing immediately after the last character produced.

Remarks: The currency symbol is generated if and only if (str.flags() & str.showbase) is nonzero.

If the number of characters generated for the specified format is less than the value returned by str.width() on entry to the function, then copies of fill are inserted as necessary to pad to the specified width.

For the value af equal to (str.flags() & str.adjustfield), if (af == str.internal) is true, the fill characters are placed where none or space appears in the formatting pattern; otherwise if (af == str.left) is true, they are placed after the other characters; otherwise, they are placed before the other characters.

Returns: The radix separator to use in case do_frac_digits() is greater than zero.235

Returns: The digit group separator to use in case do_grouping() specifies a digit grouping pattern.236

Returns: A pattern defined identically as, but not necessarily equal to, the result of numpunct<charT>​::​​do_grouping().237

Returns: A string to use as the currency identifier symbol.

Returns: do_positive_sign() returns the string to use to indicate a positive monetary value;238 do_negative_sign() returns the string to use to indicate a negative value.

Returns: The number of digits after the decimal radix separator, if any.239

Returns: The specializations required in Table 87 ([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 }.240