错误 C7034：无法使用带括号的初始化程序初始化数组

Question

我正在尝试编写一个本机 Node 插件，它在 Windows 机器上枚举所有 windows 和 returns 他们对 JS userland 的标题数组。

但是我被这个错误难住了：

C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\xmemory0(655): error C3074: an array cannot be initialized with a parenthesized initializer [C:\xampp\htdocs\enum-windows\build\enumWindows.vcxproj]

C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\xmemory0(773): note: see reference to function template instantiation 'void std::allocator<_Ty>::construct<_Objty,char(&)[255]>(_Objty (*),char (&)[255])' being comp iled with [ _Ty=char [255], _Objty=char [255] ]

据我所知，我没有执行数组的括号初始化？

#include <vector>
#include <node.h>
#include <v8.h>
#include <windows.h>
#include <stdio.h>

using namespace node;
using namespace v8;

BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM ptr) {
    std::vector<char[255]>* windowTitles =
        reinterpret_cast<std::vector<char[255]>*>(ptr);

    if (IsWindowVisible(hWnd)) {
        int size = GetWindowTextLength(hWnd);
        char buff[255];
        GetWindowText(hWnd, (LPSTR) buff, size);
        windowTitles->push_back(buff);
    }

    return true;
};

void GetWindowTexts(const FunctionCallbackInfo<Value>& args) {
    Isolate* isolate = Isolate::GetCurrent();
    HandleScope scope(isolate);
    Local<Array> arr = Array::New(isolate);
    std::vector<char[255]> windowTitles;

    EnumWindows(
        &EnumWindowsProc, 
        reinterpret_cast<LPARAM>(&windowTitles));

    for (unsigned int i = 0; i < windowTitles.size(); i++) {
        const char* ch = reinterpret_cast<const char*>(windowTitles.at(i));
        Local<String> str = String::NewFromUtf8(isolate, ch);
        arr->Set(i, str);
    }

    args.GetReturnValue().Set(arr);
}

void init(Handle<Object> exports, Handle<Object> module) {
    NODE_SET_METHOD(module, "exports", GetWindowTexts);
}

NODE_MODULE(enumWindows, init);

我认为该错误与此行有关：

windowTitles->push_back(buff);

也许我的做法比较幼稚

Answer 1

问题出在这里：

windowTitles->push_back(buff);

因为你cannot store an array in std::vector.

来自链接的答案：

The objects stored by a standard library container must be copyable and assignable, and arrays are neither of these.

也许使用类似下面的东西。该数组已替换为 std::array<char,255>:

BOOL CALLBACK EnumWindowsProc(HWND hWnd,LPARAM ptr)
{
    std::vector<std::array<char,255>>* windowTitles =
        reinterpret_cast<std::vector<std::array<char,255>>*>(ptr);

    if (IsWindowVisible(hWnd)) {
        int size = GetWindowTextLength(hWnd);
        std::array<char,255> buff;
        GetWindowText(hWnd,(LPWSTR)buff.data(),size);
        windowTitles->push_back(buff);
    }

    return true;
};

错误 C7034：无法使用带括号的初始化程序初始化数组

Error C7034: an array cannot be initialized with a parenthesized initializer

c++

v8

visual-c++