本文整理汇总了C++中XString::front方法的典型用法代码示例。如果您正苦于以下问题：C++ XString::front方法的具体用法？C++ XString::front怎么用？C++ XString::front使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类XString的用法示例。
在下文中一共展示了XString::front方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: extract
inline
bool extract(XString str, HumanTimeDiff *iv)
{
// str is a sequence of [-+]?[0-9]+([ay]|m|[jd]|h|mn|s)
// there are NO spaces here
// parse by counting the number starts
auto is_num = [](char c)
{ return c == '-' || c == '+' || ('0' <= c && c <= '9'); };
if (!str || !is_num(str.front()))
return false;
*iv = HumanTimeDiff{};
while (str)
{
auto it = std::find_if_not(str.begin(), str.end(), is_num);
auto it2 = std::find_if(it, str.end(), is_num);
XString number = str.xislice_h(it);
XString suffix = str.xislice(it, it2);
str = str.xislice_t(it2);
short *ptr = nullptr;
if (suffix == "y"_s || suffix == "a"_s)
ptr = &iv->year;
else if (suffix == "m"_s)
ptr = &iv->month;
else if (suffix == "j"_s || suffix == "d"_s)
ptr = &iv->day;
else if (suffix == "h"_s)
ptr = &iv->hour;
else if (suffix == "mn"_s)
ptr = &iv->minute;
else if (suffix == "s"_s)
ptr = &iv->second;
else
return false;
if (number.startswith('+') && !number.startswith("+-"_s))
number = number.xslice_t(1);
if (*ptr || !extract(number, ptr))
return false;
}
return true;
}示例2: e_mail_check
//---------------------------------------------------
// E-mail check: return 0 (not correct) or 1 (valid).
//---------------------------------------------------
bool e_mail_check(XString email)
{
// athena limits
if (email.size() < 3 || email.size() > 39)
return 0;
// part of RFC limits (official reference of e-mail description)
XString::iterator at = std::find(email.begin(), email.end(), '@');
if (at == email.end())
return 0;
XString username = email.xislice_h(at);
XString hostname = email.xislice_t(at + 1);
if (!username || !hostname)
return 0;
if (hostname.contains('@'))
return 0;
if (hostname.front() == '.' || hostname.back() == '.')
return 0;
if (hostname.contains_seq(".."))
return 0;
if (email.contains_any(" ;"))
return 0;
return email.is_print();
}