问题标签 [aggregate-initialization]
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c++ - How does this particular struct function like this? (arcsynthesis modern 3D graphics programming)
I am using arcsynthesis' tutorial to learn modern 3D graphics programming, and while I am understanding most of it I have run into a snag with what the author calls "complex management code" I can't understand how this code works:
I don't quite get how the function pointer is getting set inside the struct in the g_instanceList[] I don't get syntactically how this works and then how this g_instanceList is used in the next segment here:
I thought I was pretty familiar with c++ by this point but this syntactic sugar is new to me. Thanks in advance :)
c++ - 聚合内标量的大括号初始化
知道这是有效的 c++11
这个有效吗?
GCC 给出一个错误,发出警告。
c++ - 在聚合初始化列表的给定位置,传递到先前位置的值是否可以安全地从相应成员中读取?
按照标准,上面例子中读“sa”是否安全,这样s被初始化为a=5,b=6?如果是这样,大多数编译器是否遵守这条规则?
(以上在VC10中编译。)
c++ - 原子结构的统一初始化?
编辑:两者都在 g++ 中工作,在铿锵声中都不工作{{1, 2}}
。({1, 2})
铿锵有没有解决方法?
c++ - 如何使用新运算符在表达式中聚合初始化 STL 容器?
我正在尝试做类似的事情:
是否可以在这样的表达式中聚合初始化 STL 容器?
PS:可能很重要-我有VS2010。
c++ - 具有非静态成员初始化器的类的 C++11 聚合初始化
标准中是否允许:
这个类仍然是聚合的吗?
clang
接受此代码,但gcc
不接受。
c++ - std::array 的嵌套聚合初始化
我想知道,为什么std_arr
在下面的代码中声明会产生错误,而c_arr
编译得很好:
两者std::array
都是S
聚合。从cppreference.com 上的聚合初始化:
如果初始化子句是嵌套的花括号初始化列表(它不是表达式并且没有类型),则相应的类成员本身就是一个聚合:聚合初始化是递归的。
为什么这个初始化std::array
不编译?
c++ - 如何使用列表初始化对聚合类型进行值初始化
如何使用列表初始化语法对 C++14 中的聚合类型进行值初始化?
这被视为聚合初始化,它会为未初始化的Aggregate_t
.
这可能吗?
编辑:例子
使用 g++-4.9.2 编译:
c++ - Does it violate the standard for a non-default-constuctible struct to lack a user-defined constructor?
It is possible to define a struct
(a) that has no user-defined constructors, and (b) for which a default constructor cannot be generated. For example, Foo
in the below:
You can still create instances of Foo
using aggregate initialization:
My normal compiler (VS2012) will grudgingly accept this, but it raises 2 warnings:
warning C4510: 'Foo': default constructor could not be generated.
warning C4610: struct 'Foo' can never be instantiated - user defined constructor required
Of course, I've just proved warning #2 wrong--you can still instantiate it using aggregate initialization. The online compilers I've tried are happy enough to accept the above, so I'm guessing VS2012 is just being overly-aggressive with this warning. But I'd like to be sure--is this code ok, or does it technically violate some obscure part of the standard?