Why does this constructor-usage not compile ?

[highhead]

Hi,

assume a simple class like this (string-header has been included and "using namespace std" has been used):

class someclass
{
private:
string m_string;

public:
someclass(string& str){m_string = str;}
};

now I want to use this class in a programm like this

someclass* cinst = new someclass(string("test"));

but this doesn't compile without error. have you got any idea why ? the compiler-error occures at the line in the program where I want to instantiate "someclass".

if I use the following everything works fine:

string str = "test";

someclass* cinst = new someclass(str);

thank you

highhead