2019年1月20日 · struct A { A(const char *); auto operator<=>(const A&) const = default; }; template<A a> A operator ""_a(); In trying to understand what this feature is I've just learned …

2014年1月12日 · SELECT txt1 FROM T1 WHERE txt1 LIKE '_a%' will select records with txt1 values of 'xa1', 'xa taco', 'ya anything really', etc. Now let's say you want to actually search for …

2013年1月6日 · class SomeClass(object): def __init__(self, a=0): self._a = a self._b = 0 def __add__(self, other): result = self.__class__() result._b = self._a + other._a return result Now, I …

2021年12月7日 · No, both r%_ and r% don't actually mean the same thing. The first version r%_ will match any string starting with r, followed by zero or more of any character, followed by any …

2014年4月26日 · It is because of the Private name mangling.. Private name mangling: When an identifier that textually occurs in a class definition begins with two or more underscore …

2016年2月3日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …

2010年11月22日 · It instead get a '_a list ref type. This mean that the type is not polymorphic, but merely unknown. Once you do something with a involving a particular type, it fixes '_a once …

2012年5月22日 · int x = ({ int _a = a++; int _b = b--; _a > _b ? _a : _b; }) This runs the side effects only once. But, to be honest, you should ditch that macro altogether and use an inline function, …

2014年6月24日 · Assert position at the beginning of the string «^» Match a single character in the range between “a” and “z” «[a-z]{1}» Exactly 1 times «{1}» Match a single character present in …

2020年6月26日 · If I define a Python class which has an instance field/variable __MAX_N, it seems Python applies this private name mangling thing. But if I rename it to __MAX_N__ then …