“操作符>>>”不匹配在's>>>>>> [英] No Match for 'Operator>>' in 's>>local"

问题描述

此函数阻止Wagic：自制软件从编译：

This function is preventing Wagic: the homebrew from Compiling:

/ home / white / Pandora / wagic-read-only / projects / mtg / src / GameOptions。 cpp：1156：error：没有匹配'operator >>'in's >> local'

/home/white/Pandora/wagic-read-only/projects/mtg/src/GameOptions.cpp:1156: error: no match for ‘operator>>’ in ‘s >> local’

源（GameOptions.cpp）： http://code.google.com/p/wagic/source/browse/trunk / projects / mtg / src / GameOptions.cpp
源代码（一般）：
http://code.google.com/p/wagic/source/browse/

Source(GameOptions.cpp): http://code.google.com/p/wagic/source/browse/trunk/projects/mtg/src/ GameOptions.cpp Source(General): http://code.google.com/p/wagic/source/browse/

（第1142-1172行）

(Line 1142-1172)

    bool GameOptionKeyBindings::read(string input)
{
istringstream iss(input);
vector<pair<LocalKeySym, JButton> > assoc;

while (iss.good())
{
    stringstream s;
    iss.get(*(s.rdbuf()), ',');
    iss.get();

    LocalKeySym local;
    char sep;
    u32 button;
    s >> local >> sep >> button; 
    if (':' != sep)
        return false;
    assoc.push_back(make_pair(local, u32_to_button(button)));
}

if (assoc.empty())
    return false;

JGE* j = JGE::GetInstance();

j->ClearBindings();
for (vector<pair<LocalKeySym, JButton> >::const_iterator it = assoc.begin(); it != assoc.end(); ++it)
    j->BindKey(it->first, it->second);

return true;
}

如何重写这个来编译？

推荐答案

s >> local

调用默认 operator>> 它不理解你的自定义类 LocalKeySym 所以你需要为你的自定义类重载 Operator>> LocalKeySym 。

Calls the default operator >> which does not understand your custom class LocalKeySym So You need to Overload the Operator >> for your custom class LocalKeySym.

示例代码：

std::istream& operator>>(std::istream& is, LocalKeySym& obj) 
{ 
  // read LocalKeySym obj from stream 

  if( /* no valid object of LocalKeySym found in stream */ )
       is.setstate(std::ios::failbit);

  return is;
}

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