convert_string.h

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#pragma once
 
#include <string>
#include <sstream>
#include <iomanip>
 
#include "lib_begin.h"
 
namespace cgv {
    namespace utils {
 
template <typename T>
std::string to_string(const T& v, unsigned int w = -1, unsigned int p = -1, bool fixed=false)
{
    std::stringstream ss;
    if (fixed)
        ss << std::fixed;
    if (w != (unsigned int)-1)
        ss << std::setw(w);
    if (p != (unsigned int)-1)
        ss << std::setprecision(p);
    ss << v;
    return ss.str();
}
 
template <typename T>
std::string to_string(const T& v, unsigned int w, char fill_char)
{
    std::stringstream ss;
    ss << std::setw(w) << std::setfill(fill_char) << v;
    return ss.str();
}
 
template <> CGV_API std::string to_string(const std::string& v, unsigned int w, unsigned int p, bool);
 
template <typename T>
bool from_string(T& v, const std::string& s)
{
    std::stringstream ss(s);
    ss >> v;
    return !ss.fail();
}
 
template <> CGV_API bool from_string(std::string& v, const std::string& s);
 
    }
}
 
#include <cgv/config/lib_end.h>