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/*
* Typesafe printf-like wrapper around std streams
* by Igor Kozyrenko, 2013
*/
#include <cstring>
#include <cwchar>
#include <ostream>
#include <sstream>
namespace typesafe_format {
namespace impl {
// Pointer avoidance magic
template<class T> struct no_pointers { enum { allowed = 1 }; };
template<> struct no_pointers<char*> { enum { allowed = 1 }; };
template<> struct no_pointers<const char*> { enum { allowed = 1 }; };
template<> struct no_pointers<wchar_t*> { enum { allowed = 1 }; };
template<> struct no_pointers<const wchar_t*>{ enum { allowed = 1 }; };
template<class T> struct no_pointers<T*> { enum { allowed = 0 }; };
// Static assert helper
template<bool b> struct my_static_assert {};
template<> struct my_static_assert<true> { enum { here }; };
template <typename CT>
struct Streamable {
virtual void OutputToStream(std::basic_ostream<CT>& stream) const = 0;
virtual ~Streamable() {}
};
template <typename CT, typename T>
struct StreamableValue: public Streamable<CT> {
StreamableValue(const T& val): val_(val) {
// You can wrap pointer with typesafe_format::ptr to pass this check
(void)my_static_assert<no_pointers<T>::allowed>::here;
}
void OutputToStream(std::basic_ostream<CT>& stream) const {
stream<<val_;
}
private:
const T& val_;
};
inline size_t len(const char* str) { return std::strlen(str); }
inline size_t len(const wchar_t* str) { return std::wcslen(str); }
void format_params(const char* fmt, size_t fmt_length, std::ostream& os,
const Streamable<char>* params[], size_t params_count);
void format_params(const wchar_t* fmt, size_t fmt_length, std::wostream& os,
const Streamable<wchar_t>* params[], size_t params_count);
} // namespace impl
// Wrapper class to pass anti-pointer protection
struct ptr {
explicit ptr(void* ptr): ptr_(ptr) {}
private:
void* ptr_;
template <typename CT>
friend std::basic_ostream<CT>& operator<<(std::basic_ostream<CT>&,
const ptr&);
};
template <typename CT>
inline std::basic_ostream<CT>& operator<<(std::basic_ostream<CT>& os,
const ptr& ptr) {
return os<<ptr.ptr_;
}
// stream format overloads
template <typename CT>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length) {
return os.write(fmt, fmt_length);
}
template <typename CT,
typename T0>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0) {
impl::StreamableValue<CT, T0> s0(p0);
const impl::Streamable<CT>* params[] =
{&s0};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
const impl::Streamable<CT>* params[] =
{&s0, &s1};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
impl::StreamableValue<CT, T4> s4(p4);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3, &s4};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
impl::StreamableValue<CT, T4> s4(p4);
impl::StreamableValue<CT, T5> s5(p5);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3, &s4, &s5};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
impl::StreamableValue<CT, T4> s4(p4);
impl::StreamableValue<CT, T5> s5(p5);
impl::StreamableValue<CT, T6> s6(p6);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3, &s4, &s5, &s6};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
impl::StreamableValue<CT, T4> s4(p4);
impl::StreamableValue<CT, T5> s5(p5);
impl::StreamableValue<CT, T6> s6(p6);
impl::StreamableValue<CT, T7> s7(p7);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
impl::StreamableValue<CT, T4> s4(p4);
impl::StreamableValue<CT, T5> s5(p5);
impl::StreamableValue<CT, T6> s6(p6);
impl::StreamableValue<CT, T7> s7(p7);
impl::StreamableValue<CT, T8> s8(p8);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7, &s8};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9>
std::basic_ostream<CT>& strmfmtl(
std::basic_ostream<CT>& os, const CT* fmt, size_t fmt_length,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8, const T9& p9) {
impl::StreamableValue<CT, T0> s0(p0);
impl::StreamableValue<CT, T1> s1(p1);
impl::StreamableValue<CT, T2> s2(p2);
impl::StreamableValue<CT, T3> s3(p3);
impl::StreamableValue<CT, T4> s4(p4);
impl::StreamableValue<CT, T5> s5(p5);
impl::StreamableValue<CT, T6> s6(p6);
impl::StreamableValue<CT, T7> s7(p7);
impl::StreamableValue<CT, T8> s8(p8);
impl::StreamableValue<CT, T9> s9(p9);
const impl::Streamable<CT>* params[] =
{&s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7, &s8, &s9};
impl::format_params(fmt, fmt_length, os,
params, sizeof params/sizeof params[0]);
return os;
}
/*
* Stream format overloads
* */
template <typename CT>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt) {
return strmfmtl(os, fmt, impl::len(fmt));
}
template <typename CT,
typename T0>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt, const T0& p0) {
return strmfmtl(os, fmt, impl::len(fmt), p0);
}
template <typename CT,
typename T0, typename T1>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1);
}
template <typename CT,
typename T0, typename T1, typename T2>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3, p4);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6, p7);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6, p7, p8);
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9>
std::basic_ostream<CT>& strmfmt(
std::basic_ostream<CT>& os, const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8, const T9& p9) {
return strmfmtl(os, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6, p7, p8, p9);
}
/*
*
* Char array format overloads
*
*/
template <typename CT,
typename T0>
std::basic_string<CT> format(const CT* fmt,
const T0& p0) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0);
return stream.str();
}
template <typename CT,
typename T0, typename T1>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3, p4);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6, p7);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6, p7, p8);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9>
std::basic_string<CT> format(const CT* fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8, const T9& p9) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt, impl::len(fmt), p0, p1, p2, p3, p4, p5, p6, p7, p8, p9);
return stream.str();
}
/*
*
* STL string overloads
*
*/
template <typename CT,
typename T0>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0);
return stream.str();
}
template <typename CT,
typename T0, typename T1>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3, p4);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3, p4, p5);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3, p4, p5, p6);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3, p4, p5, p6, p7);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3, p4, p5, p6, p7, p8);
return stream.str();
}
template <typename CT,
typename T0, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9>
std::basic_string<CT> format(const std::basic_string<CT> fmt,
const T0& p0, const T1& p1, const T2& p2, const T3& p3, const T4& p4,
const T5& p5, const T6& p6, const T7& p7, const T8& p8, const T9& p9) {
std::basic_stringstream<CT> stream;
strmfmtl(stream, fmt.c_str(), fmt.size(),
p0, p1, p2, p3, p4, p5, p6, p7, p8, p9);
return stream.str();
}
} // namespace typesafe_format
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