我理解在lambda中捕获this
(修改对象属性)的正确方法如下:
auto f = [this] () { /* ... */ };
但我对我所看到的以下特性感到好奇:
class C {
public:
void foo() {
// auto f = [] () { // this not captured
auto f = [&] () { // why does this work?
// auto f = [&this] () { // Expected ',' before 'this'
// auto f = [this] () { // works as expected
x = 5;
};
f();
}
private:
int x;
};
奇怪的是,我对以下问题感到困惑(并希望得到答案):
auto f = [&] () { /* ... */ }; // capture everything by reference
以及为什么我不能通过引用显式捕获this
:
auto f = [&this] () { /* ... */ }; // a compiler error as seen above.
https://stackoverflow.com/questions/16323032
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