bug in test/Validator.cpp?

[Paul S R Chisholm]

XmlRpc++ 0.7 test/Validator.cpp:

131 class ModerateSizeArrayCheck : public XmlRpcServerMethod
132 {
133 public:
134   ModerateSizeArrayCheck(XmlRpcServer* s) :
   XmlRpcServerMethod("validator1.moderateSizeArrayCheck", s) {}
135
136   void execute(XmlRpcValue& params, XmlRpcValue& result)
137   {
138     std::cerr << "ModerateSizeArrayCheck\n";
139     std::string s = params[0][0];
140>    s += params[0][params[0].size()-1];
141     result = s;
142   }
143 } moderateSizeArrayCheck(&s);

When compiling with gcc 3.3.1 on Solaris 8, I get:

Validator.cpp:140: error: ambiguous overload for 'operator+=' ...

Problem is, since there's no exact match, there are three things
an XmlRpcValue can be cast to that can be appended to a string,
and three flavors of += worth considering:

string& string::operator+=(const string&)
string& string::operator+=(const char*)
string& string::operator+=(char)

Looks to me as if the compiler's right and the code is wrong. I
don't know why gcc 3.1 and 3.2.2 didn't complain.

Am I missing something?  --PSRC

[John Wasinger]

Add an extra variable to fix...

    std::cerr << "ModerateSizeArrayCheck\n";
    std::string s = params[0][0];
    std::string blah = params[0][params[0].size()-1];
    s += blah;
    result = s;