STL字符串继承 [英] STL string inheritance
问题描述
Hello社区，
我使用STL还不错，但我一直在试验它。
我尝试过从字符串派生一个新类说MyString如下：
class MyString：public string {
public：
MyString（ ）{}
};
当我尝试做的时候：
MyString MyStringInstance;
MyStringInstance =" BlaBlaBla";
它呻吟：
错误C2679：二进制''=''：没有找到哪个运算符一个右手操作数
类型''const char [9]''（或者没有可接受的转换）
MyStringInstance + =" BlaBlaBla" ;;
和
string MyStringInstance;
MyStringInstance =" BlaBlaBla";
工作正常。
为什么= My运算符在MyString中不可用？
感谢您的帮助，迈克:)
P.S.我正在使用MS Visual C ++ .NET
Hello community,
i''m fairly new to using the STL but i''ve been experimenting a bit with it.
I tried to derive a new class say MyString from string like so:
class MyString: public string{
public:
MyString(){}
};
when i then try to do:
MyString MyStringInstance;
MyStringInstance = "BlaBlaBla";
it moans:
error C2679: binary ''='' : no operator found which takes a right-hand operand
of type ''const char [9]'' (or there is no acceptable conversion)
MyStringInstance += "BlaBlaBla";
and
string MyStringInstance;
MyStringInstance = "BlaBlaBla";
works fine though.
Why is the = operator not available in MyString ??
Thanks for any help, Mike :)
P.S. I''m using MS Visual C++ .NET
推荐答案
" Mike Tyka" <米**** @ gnx.net>在留言新闻中写道：I4 ******** @ bath.ac.uk ...
"Mike Tyka" <m.****@gnx.net> wrote in message news:I4********@bath.ac.uk...
你好社区，
我很擅长使用STL，但我一直在试验它。
我试图从字符串派生一个新类说MyString，如下所示：
类MyString：public string {
public：
MyString（）{}
};
当我尝试做的时候：
MyString MyStringInstance;
MyStringInstance =" ; BlaBlaBla;
它呻吟：
错误C2679：二进制''=''：找不到运算符，它接受一个类型''const char的右手
操作数[ 9]''（或没有可接受的转换）
MyStringInstance + =" BlaBlaBla";
字符串MyStringInstance;
MyStringInstance =" BlaBlaBla" ;;
但工作正常。
为什么= My运算符在MyString中不可用？
谢谢你任何帮助，迈克:)
PS我正在使用MS Visual C ++ .NET
Hello community,
i''m fairly new to using the STL but i''ve been experimenting a bit with it.
I tried to derive a new class say MyString from string like so:
class MyString: public string{
public:
MyString(){}
};
when i then try to do:
MyString MyStringInstance;
MyStringInstance = "BlaBlaBla";
it moans:
error C2679: binary ''='' : no operator found which takes a right-hand operand of type ''const char [9]'' (or there is no acceptable conversion)
MyStringInstance += "BlaBlaBla";
and
string MyStringInstance;
MyStringInstance = "BlaBlaBla";
works fine though.
Why is the = operator not available in MyString ??
Thanks for any help, Mike :)
P.S. I''m using MS Visual C++ .NET
operator =（）不是派生类直接继承的，它是
标准C ++行为（恕我直言）
Fabio
operator=() is not directly inherited by the derived class, it is the
standard C++ behaviour (IMHO)
Fabio
" Fabio" < FA ************* @ libero.it> skrev i en meddelelse
新闻：2s ************* @ uni-berlin.de ...
"Fabio" <fa*************@libero.it> skrev i en meddelelse
news:2s*************@uni-berlin.de...
" ; Mike Tyka <米**** @ gnx.net>在消息中写道
"Mike Tyka" <m.****@gnx.net> wrote in message
新闻：I4 ******** @ bath.ac.uk ...
news:I4********@bath.ac.uk...
你好社区，
我对使用STL相当新，但我已经用
进行了一些实验。我试图从字符串派生一个新类说MyString如此：
类MyString：public string {
public：
MyString（）{}
}; <当我尝试做的时候：
MyString MyStringInstance;
MyStringInstance =" BlaBlaBla" ;;
它呻吟：错误C2679：binary''=''：找不到哪个操作符采用右侧
Hello community,
i''m fairly new to using the STL but i''ve been experimenting a bit with it. I tried to derive a new class say MyString from string like so:
class MyString: public string{
public:
MyString(){}
};
when i then try to do:
MyString MyStringInstance;
MyStringInstance = "BlaBlaBla";
it moans:
error C2679: binary ''='' : no operator found which takes a right-hand
操作数
类型为''const char [9]''（或没有可接受的转换）
MyStringInstance + =" BlaBlaBla";
字符串MyStringInstance;
MyStringInstance =" BlaBlaBla;
但工作正常。
为什么= My运算符在MyString中不可用？
感谢您的帮助，Mike :)
PS我正在使用MS Visual C ++ .NET
of type ''const char [9]'' (or there is no acceptable conversion)
MyStringInstance += "BlaBlaBla";
and
string MyStringInstance;
MyStringInstance = "BlaBlaBla";
works fine though.
Why is the = operator not available in MyString ??
Thanks for any help, Mike :)
P.S. I''m using MS Visual C++ .NET
运算符=（）不是由派生类直接继承的，它是
标准C ++行为（恕我直言）
Fabio
operator=() is not directly inherited by the derived class, it is the
standard C++ behaviour (IMHO)
Fabio
垃圾！当然是。
/ Peter
Rubbish! Of course it is.
/Peter
Peter Koch Larsen在新闻中写道：K7f7d.54262
Peter Koch Larsen wrote in news:K7f7d.54262
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