reinterpret_cast 转换C++ C++ 语言 表达式 通过重新解释底层位模式在类型间转换。 语法reinterpret_cast< 目标类型 >( 表达式 ) 返回目标类型 类型的值。 解释与static_cast 不同,但与 const_cast 类似,reinterpret_cast 表达式不会编译成任何 CPU 指令(除非在整数和指针间转换,或在指针表示依赖它的类型的...
e)reinterpret_cast后随const_cast。 选择首个满足相应转换运算符要求的方式,即便它非良构(见示例)。如果选择的是static_cast后随const_cast的方式,并且该转换存在多种解释,那么该转换非良构。 另外,C 风格转换写法允许从、向不完整类型的指针,或在不完整类型的指针之间进行双向转换。如果一元表达式 的类型和...
reinterpret_castconverts type to unrelated type C-style castconverts one type to another by a mix ofstatic_cast,const_cast, andreinterpret_cast newcreates objects with dynamic storage duration deletedestructs objects previously created by the new expression and releases obtained memory area ...
(not an alias of q)}// In this example, C-style cast is interpreted as static_cast// even though it would work as reinterpret_caststructA{};structI1:A{};structI2:A{};structD:I1, I2{};intmain(){D*d=nullptr;// A* a = (A*)d; // compile-time errorA*a=reinterpret_cast...
if( x < 0 ) break; cout << x << endl; x++; } break语句只能跳出本层循环,假如你要跳出一个三重嵌套的循环,你就要使用包含其它的逻辑或者用一个goto语句跳出这个嵌套循环. case 在switch里面用来检测匹配 . default,switch catch catch 语句通常通过throw语句捕获一个异常. ...
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; fstream file("numbers.dat", ios::out | ios::binary); file.write(reinterpret_cast<char *>(numbers), sizeof(numbers)); file.open("numbers.dat", ios::in | ios::binary); file.read(reinterpret_cast<char *>(numbers), sizeof(numbers)); ...
R^ r6 =reinterpret_cast(l);// error, can't convert from integer std::sets;// error, R^ can't be compared with less 所有指向同一个托管对象的引用都可以被看作是等价的,即使对象被GC移动了也是如此。一个handle可以有任意的生存周期。也可以被指定成nullptr。对于一个handle类型的变量,你也可以通过...
const_cast, static_cast, dynamic_cast, reinterpret_cast und typeid sind nicht enthalten, da sie immer eindeutig sind. Einige der Operatoren haben alternative Schreibweisen (z.B. and für &&, or für ||, not für !, usw.). Siehe auch Auswertungsreihenfolge von Operator-Argumenten zur...
reinterpret_cast requires return short signed sizeof static static_assert static_cast struct switch synchronized template this thread_local throw true try typedef typeid typename union unsigned using virtual void volatile wchar_t while xor xor_eq final override transaction_safe transaction_safe_dynamic 预...
reinterpret_cast requires return short signed sizeof static static_assert static_cast struct switch synchronized template this thread_local throw true try typedef typeid typename union unsigned using virtual void volatile wchar_t while xor xor_eq final override transaction_safe transaction_safe_dynamic 预...