无序映射的左值到右值转换

Question

从外部库接收参数：

candidate function not viable: no known conversion from 'std::unordered_map<string, string>' to 'std::unordered_map<string, string> &&' (aka 'unordered_map<basic_string<char>, basic_string<char> > &&') for 1st argument

void someMethod(shared_ptr<Context> ctx, std::unordered_map<string, string>&& config) {
    ctx->setConfigOverrides(config);
}

// From Context :
// I can't change following method :
void setConfigOverrides(
    std::unordered_map<string, string>&& configOverrides) {
    setConfigOverrides(make_shared<const MemConfig>(move(configOverrides)));
}

Answer 1

您错过了将输入参数移至下一个相同的接收器的问题。这个：