Thanks for replying.
Let's end this talk because no matter what *I* think, the standard IS the
standars. I can't change it.
----Original Message Follows----
From: Eljay Love-Jensen <eljay@xxxxxxxxx>
To: Neo Anderson <neo_in_matrix@xxxxxxx>, gcc-help@xxxxxxxxxxx
Subject: Re: Puzzled by const string& parameter
Date: Fri, 24 Jun 2005 11:24:58 -0500
Hi Neo,
>If this code compiles under gcc, where is the DOH?
#include <string>
using std::string;
void test(string& s)
{
s = "abc";
}
int main()
{
test(string("123"));
}
That code does not compile under GCC 3.3.3.
neo.cpp: In function `int main()':
neo.cpp:11: error: invalid initialization of non-const reference of type
'std::string&' from a temporary of type 'std::string'
neo.cpp:5: error: in passing argument 1 of `void test(std::string&)'
The "DOH" is in the anonymous temporary being passed into the test function,
when you've specified that the parameter in the test function cannot be a
temporary.
The compiler indicates this error: "invalid initialization of non-const
reference of type 'std::string&' from a temporary of type 'std::string'".
To thwart the compiler, you could do this:
test((string&)(string const&)string("123"));
Or you could make a string wrapper which has an operator to return a
non-const reference to the actual string.
HTH,
--Eljay
