lambda表达式语法错误

Question

This code:

#include "Backpack.h"
#include <sstream>
#include <algorithm>

int Backpack::getCurrentWeight()
{
    int weight = 0;
    std::for_each(items.begin(),items.end(),[&](std::shared_ptr<PickupItem> item){ //8
        weight +=item->getWeight();
    });
    return weight;
}

generates these errors:

Backpack.cpp: In member function 'int Backpack::getCurrentWeight()':
Backpack.cpp:8: error: expected primary-expression before '[' token
Backpack.cpp:8: error: expected primary-expression before ']' token
Backpack.cpp:8: error: expected primary-expression before 'item'

The project builds on Linux, but on Windows it does not. My Qt version: Qt 4.7.4 for Desktop - MinGW 4.4 (Qt SDK). I added following flag: QMAKE_CXXFLAGS += -std=c++0x

Answer 1

您的编译器不支持lambda表达式。