初始化系列之零初始化(zero initialization) 零初始化 把一个对象的初始化值设置为0 说明 零初始化会在下面的情况下执行: 对于任何static或者thread-local变量,没有使用const,在任何初始化之前,会进行0初始化,也就是static和thread-local修饰的变量会0初始化 如果不是类,作为数值初始化序列的一部分;如果是类,并且...
The effects of zero-initialization are: IfTis ascalar type, the object is initialized to the value obtained byexplicitly convertingthe integer literal0(zero) toT. IfTis a non-union class type: allpadding bitsare initialized to zero bits, ...
msvc zero-initialization Jan 27, 2021 at 6:09am Ganado(6814) https://godbolt.org/z/xqad3W https://godbolt.org/z/31Esb4 1 2 3 4 5 6 7 8 9 10 11 #include <cstring>charfoo() {char* filename =newchar[32]; ::memset(filename, 0, 32);charch = filename[15];delete[] ...
During startup, standards-compliant C and C++ compilers initialize global data to zero, eliminating the need to include zero-initialization code for this data in the generated code. Standards-compliant compilers do not necessarily initialize dynamically allocated data and local variables to zero. Before...
zero initialization 将对象的初始值设置为零。 句法 static T object ; (1) T () ; T t = {} ; T {} ; (2) (since C++11) char array n = ""; (3) 解释 在下列情况下执行零初始化: 1%29用于每个具有静态或线程本地的命名变量存储时间不受常数初始化%28自C++14%29以来,在任何...
Zero Initialization of POD and Scalar Types Article 11/16/2012 POD and scalar types will always be zero initialized if instantiated with the default constructor syntax.Copy struct S { void *operator new (unsigned int size, void*p, int i) { ((S*)p)->i = i; return p; } int i;...
int i = i; // #1 static storage duration [basic.life] p1 says A variable is said to have vacuous initialization if it is default-initialized and, if it is of class type or a (possibly multi-dimensional) array thereof, that class type has...
}template<typenameT>classA{private:Tx;Ty;Tz;public://A():x(), y(), z(){}voidMyPrint(){ cout<<x<<" "<<y<<" "<<z<<endl; } };intmain(intargc,char*argv[]) { f(1); f(1.1);A<int>a; a.MyPrint();return0;
fix(tree): use empty brace initializers for zero-initialization … 391d718 aws-nslick mentioned this pull request Sep 13, 2024 feat(build): disable semantic interposition #601 Closed aws-nslick changed the base branch from aws-nslick/stack/34 to master September 13, 2024 17:49 aws-n...
I'd love to know what the guaranteed and actual behavior are wrt zero initialization and if there is any switch for getting local arrays zero initialized.We are migrating some VAX FORTRAN applications that exploit the default zero initialization that the VAX (but not AXP!) did for scalars ...