no matching function for call to ‘bind(<unresolved overloaded function type>, boost::arg<1>&, const char [2])’
所以......解决<unresolved overloaded function type>
:
remove_copy_if(test.begin(), test.end(), out_it, boost::bind(
boost::algorithm::starts_with<std::string, std::string>, _1, "x"));
输出继电器:
$ g++ ./test.cpp ./a.exe
test3
有了多一点的工作,你可以把它不太难看键入。以下几种变化:
#include <boost/bind.hpp>
#include <boost/algorithm/string.hpp>
#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
namespace my // for alternative styles
{
static bool starts_with(const std::string& s, const std::string& prefix)
{
return boost::algorithm::starts_with(s, prefix);
}
struct starts_with_s
{
starts_with_s(const std::string& prefix) : _p(prefix) {}
bool operator()(const std::string& s) const {
return boost::algorithm::starts_with(s, _p);
}
private: const std::string _p;
};
}
int main(int , char**)
{
vector<string> test;
test.push_back("xtest2");
test.push_back("test3");
ostream_iterator<string> out_it(cout, "\n");
remove_copy_if(test.begin(), test.end(), out_it,
boost::bind(boost::algorithm::starts_with<std::string, std::string>, _1, "x"));
remove_copy_if(test.begin(), test.end(), out_it,
boost::bind(my::starts_with, _1, "x"));
my::starts_with_s pred("x");
remove_copy_if(test.begin(), test.end(), out_it, pred);
// using c++0x style lambdas
const std::string prefix = "x";
remove_copy_if(test.begin(), test.end(), out_it, [&prefix](const std::string& s)
{ return boost::algorithm::starts_with(s, prefix); });
}
啊,编译器不知道'starts_with()'中有哪两个重载我在说,所以我必须使用模板参数明确地告诉他。正确? – nabulke 2012-02-13 11:40:02
确实。如果你想少做(丑)打字 – sehe 2012-02-13 11:45:23
添加替代方法哇,非常感谢你这个详尽的答案。我想我会打印出来,并用别针把它上面我的台式机以供将来参考:-) – nabulke 2012-02-13 11:54:04