language-lawyer
When do we need to have a default constructor?
My question is simple. When do we need to have a default constructor? Please refer to the code below:[详细]
2023-02-20 19:38 分类：问答Requirements on standard library allocator pointer types
I am trying to write a quadtree sparse matrix class. In short, a quadtree_matrix<T> is either the zero matrix or a quadruple (ne, nw, se, sw) of quadtree_matrix<T>.[详细]
2023-02-20 07:55 分类：问答Is the C++ Standard Library part of the C++ Language?
Is the C++ Standard Library part of the C++ Language? (note \"language\", not \"standard\"; both are, of course, part of the standard).[详细]
2023-02-20 02:27 分类：问答Can a compliant Java implementation not contain all the standard libraries?
I\'m working on writing an implementation of the JVM in JavaScript, which means writing a lot of native code for the standard libraries in JavaScript.However, there are a huge number of classes in the[详细]
2023-02-19 20:52 分类：问答is Qt a conforming C++ implementation?
Does the C++ standard implicitly or explicitly allow such language extensions (o开发者_运维问答r use whatever other term you like) as MOC is?[详细]
2023-02-17 10:43 分类：问答Is it guaranteed to be safe to perform memcpy(0,0,0)?
I am not so well-versed in the C standard, so please bear with me. I would like to know if it is guaranteed, by the standard, that memcpy(0,0,0) is safe.[详细]
2023-02-15 21:37 分类：问答Can C++ compiler assume a const bool & value will not change?
Can the C++ compiler assume a \'const bool &\' value will not change? For example, imagine that I have a class:[详细]
2023-02-13 09:59 分类：问答Is the behaviour of i = i++ really undefined?
Possible Duplicate: Could anyone explain these undefined behaviors (i = i++ + ++i , i = i++, etc…)[详细]
2023-02-10 11:24 分类：问答lvalue doesn't designate an object after evaluation?
C99 [Section 6.3.2.1/1] sa开发者_运维技巧ys An lvalue is an expression with an object type or an incomplete type other than void;[详细]
2023-02-05 07:28 分类：问答What is the purpose of the s==NULL case for mbrtowc?
mbrtowc is specified to handle a NULL pointer for the s (multibyte character pointer) argument as follows:[详细]
2023-02-04 20:06 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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