Re: std::list question

"Jack" <>
Fri, 21 Sep 2007 21:30:09 +0800
Thanks Igor

"Igor Tandetnik" <> ???g???l???s?D:eu6P%234E$HHA.1416@TK2MSFTNGP03.phx.gbl...

"Jack" <> wrote in message

struct _myval
long idx;
std::string src_val;
std::string dst_val;
} myval;

bool IsEquals(const _myval& val1, const std::string& str2)
return val1.dst_val == str2;

list<_myval> g_MyvalList;


std::list<_myval>::iterator it = g_MyvalList.begin();

it = find_if (it, g_MyvalList.end(), IsEquals);


Error 7 error C2198: 'bool (__cdecl *)(const _myval &,const
std::string &)'

too few arguments for call c:\program files\microsoft visual studio
8\vc\include\algorithm 87

Have you noticed that you haven't at any point specified the actual string
you were supposedly looking for? Does it not surprise you?

Make it:

struct Comparator {
   Comparator(const string& s) : compare_to(s) {}

   bool operator()(const _myval& v) const {
       return v.dst_val == compare_to;
   string compare_to;

std::list<_myval>::iterator it =
   find_if(g_MyvalList.begin(), g_MyvalList.end(), Comparator("xyz"));

With best wishes,
   Igor Tandetnik

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