无匹配功能 - 专业签名隐藏通用？

发布于 2024-09-28 10:08:22 字数 1094 浏览 4 评论 0原文

我刚刚遇到了以下 C++ 编译器错误：

no matching function for call "EPTDerivedException::HandleClass( BaseClass& )"
candidates are: void EPTDerivedException::HandleClass( DerivedClass )

我无法解释这一点，因为应该有一个函数 HandleClass( BaseClass )。这是调用代码：

BaseClass oBase;
EPTDerivedException* pException2 = new EPTDerivedException;
pException2->HandleClass( oBase );

这是 EPTDerivedException 的代码：

class EPTDerivedException : public EPTException
{
public:
    EPTDerivedException();
    // generic function
    void HandleClass( DerivedClass oClass ) { Q_UNUSED(oClass); }
};

对于基类：

class EPTException
{
public:
    EPTException( QString strName );
    // specialized function
    void HandleClass( BaseClass oBase ) { Q_UNUSED(oBase); }
private:
    QString m_strName;
};

奇怪的是，当我重新编译（make clean；make）代码时，我收到错误消息。如果我在调用代码（main.cpp）中添加一个空格“” - 之后编译成功 - 我不知道为什么......

非常感谢，

Charly

PS：我使用 gcc 4.4.5 和 Debian Squeeze， qt-creator 作为 qt 4.6 的 IDE - 但这个问题与 Qt 无关。

原文

I just got stuck with the following C++ compiler error:

no matching function for call "EPTDerivedException::HandleClass( BaseClass& )"
candidates are: void EPTDerivedException::HandleClass( DerivedClass )

I cannot explain this, because there should be a function HandleClass( BaseClass ). This is the calling code:

BaseClass oBase;
EPTDerivedException* pException2 = new EPTDerivedException;
pException2->HandleClass( oBase );

And this is the code for EPTDerivedException:

class EPTDerivedException : public EPTException
{
public:
    EPTDerivedException();
    // generic function
    void HandleClass( DerivedClass oClass ) { Q_UNUSED(oClass); }
};

And for the base class:

class EPTException
{
public:
    EPTException( QString strName );
    // specialized function
    void HandleClass( BaseClass oBase ) { Q_UNUSED(oBase); }
private:
    QString m_strName;
};

The strange things is also, that when I recompile (make clean; make) the code, I get the error message. If I add a space " " in the calling code (main.cpp) - the compiling afterwards is successful - and I have no idea why...

Thanks a lot,

Charly

PS: I use gcc 4.4.5 with Debian Squeeze, the qt-creator as IDE with qt 4.6 - but this problem is independent from Qt.

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