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io.hpp
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io.hpp
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/*=============================================================================
Copyright (c) 2011-2015 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_IO_HPP
#define SPROUT_IO_HPP
#include <iosfwd>
#include <utility>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/detail/param_at.hpp>
#include <sprout/index_tuple/metafunction.hpp>
#include <sprout/array/array.hpp>
#include <sprout/string.hpp>
#include <sprout/pit/pit.hpp>
#include <sprout/utility/value_holder/value_holder.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/range/algorithm/lower_bound.hpp>
#include <sprout/range/numeric/partial_sum.hpp>
#include <sprout/type_traits/is_char_type.hpp>
#include HDR_ALGORITHM_MIN_MAX_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace io {
namespace flags {
//
// fmtflags
//
enum fmtflags {
boolalpha = 1L << 0,
showbase = 1L << 1,
showpoint = 1L << 2,
showpos = 1L << 3,
uppercase = 1L << 4,
skipws = 1L << 5,
right = 1L << 6,
left = 1L << 7,
internal = 1L << 8,
dec = 1L << 9,
hex = 1L << 10,
oct = 1L << 11,
fixed = 1L << 12,
scientific = 1L << 13,
adjustfield = right | left | internal,
basefield = dec | hex | oct,
floatfield = fixed | scientific,
booleanfield = boolalpha | showbase | showpoint | showpos | uppercase | skipws,
default_flags = right | dec | fixed,
precision_ = 1L << 14,
width_ = 1L << 15,
fill_ = 1L << 16,
modified_shift_ = 17,
};
//
// boolean_flag
//
template<sprout::io::flags::fmtflags Flag>
struct boolean_flag
: public sprout::integral_constant<sprout::io::flags::fmtflags, Flag>
{
private:
bool flag_;
public:
SPROUT_CONSTEXPR boolean_flag() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
boolean_flag(boolean_flag const&) = default;
SPROUT_CONSTEXPR boolean_flag(bool flag)
: flag_(flag)
{}
SPROUT_CONSTEXPR boolean_flag operator()(bool flag) const {
return boolean_flag(flag);
}
SPROUT_CONSTEXPR operator bool() const {
return flag_;
}
SPROUT_CONSTEXPR bool operator!() const {
return !flag_;
}
};
//
// field_flag
//
template<sprout::io::flags::fmtflags Flag, sprout::io::flags::fmtflags Mask>
struct field_flag
: public sprout::integral_constant<sprout::io::flags::fmtflags, Flag>
{
public:
SPROUT_STATIC_CONSTEXPR sprout::io::flags::fmtflags mask = Mask;
public:
SPROUT_CONSTEXPR field_flag() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
field_flag(field_flag const&) = default;
};
template<sprout::io::flags::fmtflags Flag, sprout::io::flags::fmtflags Mask>
SPROUT_CONSTEXPR_OR_CONST sprout::io::flags::fmtflags sprout::io::flags::field_flag<Flag, Mask>::mask;
//
// precision_t
//
struct precision_t {
public:
typedef std::streamsize type;
public:
type value;
public:
SPROUT_CONSTEXPR precision_t(type value)
: value(value)
{}
SPROUT_CONSTEXPR operator type() const {
return value;
}
};
//
// width_t
//
struct width_t {
public:
typedef std::streamsize type;
public:
type value;
public:
SPROUT_CONSTEXPR width_t(type value)
: value(value)
{}
SPROUT_CONSTEXPR operator type() const {
return value;
}
};
//
// fill_t
//
struct fill_t {
public:
typedef char type;
public:
type value;
public:
SPROUT_CONSTEXPR fill_t(type value)
: value(value)
{}
SPROUT_CONSTEXPR operator type() const {
return value;
}
};
} // namespace flags
SPROUT_STATIC_CONSTEXPR sprout::io::flags::boolean_flag<sprout::io::flags::boolalpha> boolalpha = true;
SPROUT_STATIC_CONSTEXPR sprout::io::flags::boolean_flag<sprout::io::flags::showbase> showbase = true;
SPROUT_STATIC_CONSTEXPR sprout::io::flags::boolean_flag<sprout::io::flags::showpoint> showpoint = true;
SPROUT_STATIC_CONSTEXPR sprout::io::flags::boolean_flag<sprout::io::flags::showpos> showpos = true;
SPROUT_STATIC_CONSTEXPR sprout::io::flags::boolean_flag<sprout::io::flags::uppercase> uppercase = true;
SPROUT_STATIC_CONSTEXPR sprout::io::flags::boolean_flag<sprout::io::flags::skipws> skipws = true;
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::right, sprout::io::flags::adjustfield> right = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::left, sprout::io::flags::adjustfield> left = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::internal, sprout::io::flags::adjustfield> internal = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::dec, sprout::io::flags::basefield> dec = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::hex, sprout::io::flags::basefield> hex = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::oct, sprout::io::flags::basefield> oct = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::fixed, sprout::io::flags::floatfield> fixed = {};
SPROUT_STATIC_CONSTEXPR sprout::io::flags::field_flag<sprout::io::flags::scientific, sprout::io::flags::floatfield> scientific = {};
//
// precision
// width
// fill
//
inline SPROUT_CONSTEXPR sprout::io::flags::precision_t
precision(sprout::io::flags::precision_t::type value) {
return sprout::io::flags::precision_t(value);
}
inline SPROUT_CONSTEXPR sprout::io::flags::width_t
width(sprout::io::flags::width_t::type value) {
return sprout::io::flags::width_t(value);
}
inline SPROUT_CONSTEXPR sprout::io::flags::fill_t
fill(sprout::io::flags::fill_t::type value) {
return sprout::io::flags::fill_t(value);
}
//
// format_settings
//
class format_settings {
private:
sprout::io::flags::fmtflags flags_;
sprout::io::flags::precision_t precision_;
sprout::io::flags::width_t width_;
sprout::io::flags::fill_t fill_;
private:
SPROUT_CONSTEXPR format_settings(format_settings const& other, sprout::io::flags::fmtflags flags)
: flags_(flags)
, precision_(other.precision_)
, width_(other.width_)
, fill_(other.fill_)
{}
SPROUT_CONSTEXPR format_settings(format_settings const& other, sprout::io::flags::precision_t precision)
: flags_(static_cast<sprout::io::flags::fmtflags>(other.flags_ | sprout::io::flags::precision_))
, precision_(precision)
, width_(other.width_)
, fill_(other.fill_)
{}
SPROUT_CONSTEXPR format_settings(format_settings const& other, sprout::io::flags::width_t width)
: flags_(static_cast<sprout::io::flags::fmtflags>(other.flags_ | sprout::io::flags::width_))
, precision_(other.precision_)
, width_(width)
, fill_(other.fill_)
{}
SPROUT_CONSTEXPR format_settings(format_settings const& other, sprout::io::flags::fill_t fill)
: flags_(static_cast<sprout::io::flags::fmtflags>(other.flags_ | sprout::io::flags::fill_))
, precision_(other.precision_)
, width_(other.width_)
, fill_(fill)
{}
SPROUT_CONSTEXPR format_settings(
sprout::io::flags::fmtflags flags,
sprout::io::flags::precision_t precision,
sprout::io::flags::width_t width,
sprout::io::flags::fill_t fill
)
: flags_(flags)
, precision_(precision)
, width_(width)
, fill_(fill)
{}
public:
SPROUT_CONSTEXPR format_settings()
: flags_(sprout::io::flags::default_flags)
, precision_(6)
, width_(0)
, fill_(' ')
{}
format_settings(format_settings const&) = default;
explicit SPROUT_CONSTEXPR format_settings(sprout::io::flags::fmtflags flags)
: flags_(flags)
, precision_(6)
, width_(0)
, fill_(' ')
{}
explicit SPROUT_CONSTEXPR format_settings(sprout::io::flags::precision_t precision)
: flags_(sprout::io::flags::default_flags)
, precision_(precision)
, width_(0)
, fill_(' ')
{}
explicit SPROUT_CONSTEXPR format_settings(sprout::io::flags::width_t width)
: flags_(sprout::io::flags::default_flags)
, precision_(6)
, width_(width)
, fill_(' ')
{}
explicit SPROUT_CONSTEXPR format_settings(sprout::io::flags::fill_t fill)
: flags_(sprout::io::flags::default_flags)
, precision_(6)
, width_(0)
, fill_(fill)
{}
SPROUT_CONSTEXPR sprout::io::flags::fmtflags flags() const {
return flags_;
}
template<sprout::io::flags::fmtflags Flag>
SPROUT_CONSTEXPR format_settings flags(sprout::io::flags::boolean_flag<Flag> flag) const {
return format_settings(
*this,
static_cast<sprout::io::flags::fmtflags>(
(flag ? flags_ | Flag : flags_ & ~Flag) | (Flag << sprout::io::flags::modified_shift_)
)
);
}
template<sprout::io::flags::fmtflags Flag, sprout::io::flags::fmtflags Mask>
SPROUT_CONSTEXPR format_settings flags(sprout::io::flags::field_flag<Flag, Mask>) const {
return format_settings(
*this,
static_cast<sprout::io::flags::fmtflags>(
(flags_ & ~Mask) | (Flag & Mask) | (Mask << sprout::io::flags::modified_shift_)
)
);
}
SPROUT_CONSTEXPR sprout::io::flags::precision_t::type precision() const {
return precision_;
}
SPROUT_CONSTEXPR format_settings precision(sprout::io::flags::precision_t precision) const {
return format_settings(*this, precision);
}
SPROUT_CONSTEXPR sprout::io::flags::width_t::type width() const {
return width_;
}
SPROUT_CONSTEXPR format_settings width(sprout::io::flags::width_t width) const {
return format_settings(*this, width);
}
SPROUT_CONSTEXPR sprout::io::flags::fill_t::type fill() const {
return fill_;
}
SPROUT_CONSTEXPR format_settings fill(sprout::io::flags::fill_t fill) const {
return format_settings(*this, fill);
}
SPROUT_CONSTEXPR format_settings combine(format_settings const& base) const {
return format_settings(
static_cast<sprout::io::flags::fmtflags>(
(base.flags_ & ~(flags_ >> sprout::io::flags::modified_shift_)) | flags_
),
flags_ & sprout::io::flags::precision_ ? precision_ : base.precision_,
flags_ & sprout::io::flags::width_ ? width_ : base.width_,
flags_ & sprout::io::flags::fill_ ? fill_ : base.fill_
);
}
};
//
// format_holder
//
template<typename T>
class format_holder {
private:
sprout::value_holder<T const&> holder_;
sprout::io::format_settings settings_;
public:
SPROUT_CONSTEXPR format_holder() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
format_holder(format_holder const&) = default;
explicit SPROUT_CONSTEXPR format_holder(T const& value)
: holder_(value)
, settings_()
{}
SPROUT_CONSTEXPR format_holder(
T const& value,
sprout::io::format_settings const& settings
)
: holder_(value)
, settings_(settings)
{}
SPROUT_CONSTEXPR format_holder(
format_holder const& holder,
sprout::io::format_settings const& settings
)
: holder_(holder)
, settings_(settings)
{}
SPROUT_CONSTEXPR T const& value() const {
return holder_;
}
SPROUT_CONSTEXPR sprout::io::format_settings const& settings() const {
return settings_;
}
SPROUT_CONSTEXPR format_holder settings(sprout::io::format_settings const& settings) const {
return format_holder(holder_, settings);
}
};
namespace flags {
template<typename T, sprout::io::flags::fmtflags Flag>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(T const& value, sprout::io::flags::boolean_flag<Flag> flag) {
return sprout::io::format_holder<T>(value, sprout::io::format_settings().flags(flag));
}
template<typename T, sprout::io::flags::fmtflags Flag, sprout::io::flags::fmtflags Mask>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(T const& value, sprout::io::flags::field_flag<Flag, Mask> flag) {
return sprout::io::format_holder<T>(value, sprout::io::format_settings().flags(flag));
}
template<typename T>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(T const& value, sprout::io::flags::precision_t precision) {
return sprout::io::format_holder<T>(value, sprout::io::format_settings(precision));
}
template<typename T>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(T const& value, sprout::io::flags::width_t width) {
return sprout::io::format_holder<T>(value, sprout::io::format_settings(width));
}
template<typename T>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(T const& value, sprout::io::flags::fill_t fill) {
return sprout::io::format_holder<T>(value, sprout::io::format_settings(fill));
}
template<typename T, sprout::io::flags::fmtflags Flag>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(sprout::io::format_holder<T> const& holder, sprout::io::flags::boolean_flag<Flag> flag) {
return holder.settings(holder.settings().flags(flag));
}
template<typename T, sprout::io::flags::fmtflags Flag, sprout::io::flags::fmtflags Mask>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(sprout::io::format_holder<T> const& holder, sprout::io::flags::field_flag<Flag, Mask> flag) {
return holder.settings(holder.settings().flags(flag));
}
template<typename T>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(sprout::io::format_holder<T> const& holder, sprout::io::flags::precision_t precision) {
return holder.settings(holder.settings().precision(precision));
}
template<typename T>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(sprout::io::format_holder<T> const& holder, sprout::io::flags::width_t width) {
return holder.settings(holder.settings().width(width));
}
template<typename T>
inline SPROUT_CONSTEXPR sprout::io::format_holder<T>
operator|(sprout::io::format_holder<T> const& holder, sprout::io::flags::fill_t fill) {
return holder.settings(holder.settings().fill(fill));
}
} // namespace flags
template<std::size_t N, typename Elem = char, typename Expression>
inline SPROUT_CONSTEXPR sprout::basic_string<Elem, N>
output(Expression const& expr);
//
// nil_expression
//
class nil_expression {};
//
// is_nil_expression
//
template<typename T>
struct is_nil_expression
: public sprout::false_type
{};
template<typename T>
struct is_nil_expression<T const>
: public sprout::io::is_nil_expression<T>
{};
template<typename T>
struct is_nil_expression<T const volatile>
: public sprout::io::is_nil_expression<T>
{};
template<>
struct is_nil_expression<sprout::io::nil_expression>
: public sprout::true_type
{};
//
// root_expression
//
class root_expression {
private:
sprout::io::format_settings settings_;
public:
SPROUT_CONSTEXPR root_expression()
: settings_()
{}
root_expression(root_expression const&) = default;
explicit SPROUT_CONSTEXPR root_expression(sprout::io::format_settings const& settings)
: settings_(settings)
{}
SPROUT_CONSTEXPR sprout::io::format_settings const& settings() const {
return settings_;
}
};
//
// is_root_expression
//
template<typename T>
struct is_root_expression
: public sprout::false_type
{};
template<typename T>
struct is_root_expression<T const>
: public sprout::io::is_root_expression<T>
{};
template<typename T>
struct is_root_expression<T const volatile>
: public sprout::io::is_root_expression<T>
{};
template<>
struct is_root_expression<sprout::io::root_expression>
: public sprout::true_type
{};
//
// leaf_expression
//
template<typename T>
class leaf_expression {
private:
sprout::value_holder<T const&> value_;
public:
SPROUT_CONSTEXPR leaf_expression()
: value_()
{}
leaf_expression(leaf_expression const&) = default;
explicit SPROUT_CONSTEXPR leaf_expression(T const& value)
: value_(value)
{}
SPROUT_CONSTEXPR T const& value() const {
return value_;
}
};
//
// is_leaf_expression
//
template<typename T>
struct is_leaf_expression
: public sprout::false_type
{};
template<typename T>
struct is_leaf_expression<T const>
: public sprout::io::is_leaf_expression<T>
{};
template<typename T>
struct is_leaf_expression<T const volatile>
: public sprout::io::is_leaf_expression<T>
{};
template<typename T>
struct is_leaf_expression<sprout::io::leaf_expression<T> >
: public sprout::true_type
{};
//
// format_expression
//
template<typename Left, typename Right>
class format_expression {
private:
typedef typename std::conditional<
sprout::io::is_root_expression<Left>::value,
Left,
Left const&
>::type left_held_type;
typedef typename std::conditional<
sprout::io::is_nil_expression<Right>::value || sprout::io::is_leaf_expression<Right>::value,
Right,
Right const&
>::type right_held_type;
typedef sprout::value_holder<left_held_type> left_holder_type;
typedef sprout::value_holder<right_held_type> right_holder_type;
private:
left_holder_type left_;
right_holder_type right_;
public:
SPROUT_CONSTEXPR format_expression()
: left_(), right_()
{}
format_expression(format_expression const&) = default;
explicit SPROUT_CONSTEXPR format_expression(Left const& left)
: left_(left), right_()
{}
explicit SPROUT_CONSTEXPR format_expression(left_holder_type left)
: left_(left), right_()
{}
SPROUT_CONSTEXPR format_expression(Left const& left, Right const& right)
: left_(left) , right_(right)
{}
SPROUT_CONSTEXPR format_expression(left_holder_type left, right_holder_type right)
: left_(left), right_(right)
{}
SPROUT_CONSTEXPR Left const& left() const {
return left_;
}
SPROUT_CONSTEXPR Right const& right() const {
return right_;
}
SPROUT_CONSTEXPR sprout::io::format_settings const& settings() const {
return left().settings();
}
template<std::size_t N, typename Elem = char>
SPROUT_CONSTEXPR sprout::basic_string<Elem, N> output() const {
return sprout::io::output<N, Elem>(*this);
}
template<std::size_t N, typename Elem = char>
SPROUT_CONSTEXPR operator sprout::basic_string<Elem, N>() const {
return sprout::io::output<N, Elem>(*this);
}
};
//
// is_format_expression
//
template<typename T>
struct is_format_expression
: public sprout::false_type
{};
template<typename T>
struct is_format_expression<T const>
: public sprout::io::is_format_expression<T>
{};
template<typename T>
struct is_format_expression<T const volatile>
: public sprout::io::is_format_expression<T>
{};
template<typename Left, typename Right>
struct is_format_expression<sprout::io::format_expression<Left, Right> >
: public sprout::true_type
{};
//
// root_t
//
typedef sprout::io::format_expression<
sprout::io::root_expression,
sprout::io::nil_expression
> root_t;
//
// root
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::io::root_t root = {};
} // anonymous-namespace
template<typename Left, typename Right, typename T>
inline SPROUT_CONSTEXPR auto
operator<<(sprout::io::format_expression<Left, Right> const& lhs, sprout::io::format_holder<T> const& rhs)
-> sprout::io::format_expression<
sprout::io::format_expression<Left, Right>,
decltype(std::declval<sprout::io::root_t>() << rhs.value())
>
{
typedef decltype(sprout::io::root << rhs.value()) type;
return sprout::io::format_expression<sprout::io::format_expression<Left, Right>, type>(
lhs,
sprout::io::root_t(sprout::io::root_expression(rhs.settings().combine(lhs.settings()))) << rhs.value()
);
}
template<typename Left, typename Right, typename T>
inline SPROUT_CONSTEXPR sprout::io::format_expression<
sprout::io::format_expression<Left, Right>,
sprout::io::leaf_expression<T>
>
operator<<(sprout::io::format_expression<Left, Right> const& lhs, T const& rhs) {
return sprout::io::format_expression<
sprout::io::format_expression<Left, Right>,
sprout::io::leaf_expression<T>
>(lhs, sprout::io::leaf_expression<T>(rhs));
}
//
// leaf_count
//
namespace detail {
template<typename Expression>
struct leaf_count;
template<>
struct leaf_count<sprout::io::root_t>
: public sprout::integral_constant<std::size_t, 0>
{};
template<typename T>
struct leaf_count<sprout::io::leaf_expression<T> >
: public sprout::integral_constant<std::size_t, 1>
{};
template<typename Left, typename Right>
struct leaf_count<sprout::io::format_expression<Left, Right> >
: public sprout::integral_constant<
std::size_t,
sprout::io::detail::leaf_count<Left>::value + sprout::io::detail::leaf_count<Right>::value
>
{};
} // namespace detail
template<typename Expression>
struct leaf_count
: public sprout::io::detail::leaf_count<Expression>
{};
template<typename Expression>
struct leaf_count<Expression const>
: public sprout::io::leaf_count<Expression>
{};
template<typename Expression>
struct leaf_count<Expression const volatile>
: public sprout::io::leaf_count<Expression>
{};
//
// leaf_at
//
namespace detail {
template<std::size_t I, typename Expression>
struct leaf_at;
template<std::size_t I, typename T>
struct leaf_at<I, sprout::io::leaf_expression<T> > {
public:
typedef T type;
};
template<std::size_t I, typename Left, typename Right>
struct leaf_at<I, sprout::io::format_expression<Left, Right> >
: public std::conditional<
I < sprout::io::leaf_count<Left>::value,
sprout::io::detail::leaf_at<I, Left>,
sprout::io::detail::leaf_at<I - sprout::io::leaf_count<Left>::value, Right>
>::type
{};
} // namespace detail
template<std::size_t I, typename Expression>
struct leaf_at
: public sprout::io::detail::leaf_at<I, Expression>
{};
template<std::size_t I, typename Expression>
struct leaf_at<I, Expression const>
: public sprout::io::leaf_at<I, Expression>
{};
template<std::size_t I, typename Expression>
struct leaf_at<I, Expression const volatile>
: public sprout::io::leaf_at<I, Expression>
{};
//
// get_leaf
//
namespace detail {
template<
std::size_t I, typename Left, typename Right,
typename sprout::enabler_if<(I >= sprout::io::leaf_count<Left>::value)>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::io::format_holder<
typename sprout::io::leaf_at<I, sprout::io::format_expression<Left, Right> >::type
>
get_leaf(sprout::io::format_expression<Left, Right> const& expr);
template<
std::size_t I, typename Left, typename T,
typename sprout::enabler_if<(I == sprout::io::leaf_count<Left>::value)>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::io::format_holder<
typename sprout::io::leaf_at<I, sprout::io::format_expression<Left, sprout::io::leaf_expression<T> > >::type
>
get_leaf(sprout::io::format_expression<Left, sprout::io::leaf_expression<T> > const& expr) {
return sprout::io::format_holder<
typename sprout::io::leaf_at<I, sprout::io::format_expression<Left, sprout::io::leaf_expression<T> > >::type
>(expr.right().value(), expr.settings());
}
template<
std::size_t I, typename Left, typename Right,
typename sprout::enabler_if<(I < sprout::io::leaf_count<Left>::value)>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::io::format_holder<
typename sprout::io::leaf_at<I, sprout::io::format_expression<Left, Right> >::type
>
get_leaf(sprout::io::format_expression<Left, Right> const& expr) {
return sprout::io::detail::get_leaf<I>(expr.left());
}
template<
std::size_t I, typename Left, typename Right,
typename sprout::enabler_if<(I >= sprout::io::leaf_count<Left>::value)>::type
>
inline SPROUT_CONSTEXPR sprout::io::format_holder<
typename sprout::io::leaf_at<I, sprout::io::format_expression<Left, Right> >::type
>
get_leaf(sprout::io::format_expression<Left, Right> const& expr) {
return sprout::io::detail::get_leaf<I - sprout::io::leaf_count<Left>::value>(expr.right());
}
} // namespace detail
template<std::size_t I, typename Expression>
inline SPROUT_CONSTEXPR sprout::io::format_holder<typename sprout::io::leaf_at<I, Expression>::type>
get_leaf(Expression const& expr) {
return sprout::io::detail::get_leaf<I>(expr);
}
//
// eval
//
template<
typename Elem, std::size_t N, typename T,
typename sprout::enabler_if<
std::is_integral<T>::value
&& !sprout::is_char_type<T>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
eval(sprout::io::format_holder<T> const& holder)
-> decltype(sprout::int_to_string<Elem>(holder.value()))
{
return sprout::int_to_string<Elem>(holder.value());
}
template<
typename Elem, std::size_t N, typename T,
typename sprout::enabler_if<std::is_floating_point<T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
eval(sprout::io::format_holder<T> const& holder)
-> decltype(sprout::float_to_string<Elem>(holder.value()))
{
return sprout::float_to_string<Elem>(holder.value());
}
template<
typename Elem, std::size_t N, typename T,
typename sprout::enabler_if<sprout::is_char_type<T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
eval(sprout::io::format_holder<T> const& holder)
-> decltype(sprout::detail::string_construct_access<Elem, 1>::raw_construct(1, static_cast<Elem>(holder.value())))
{
return sprout::detail::string_construct_access<Elem, 1>::raw_construct(1, static_cast<Elem>(holder.value()));
}
template<
typename Elem, std::size_t N, typename T,
typename sprout::enabler_if<std::is_array<T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
eval(sprout::io::format_holder<T> const& holder)
-> decltype(sprout::to_string(holder.value()))
{
return sprout::to_string(holder.value());
}
template<
typename Elem, std::size_t N, typename T,
typename sprout::enabler_if<sprout::is_string<T>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
eval(sprout::io::format_holder<T> const& holder)
-> decltype(holder.value())
{
return holder.value();
}
namespace detail {
template<typename Elem, typename RandomAccessIterator, std::size_t K, typename... Args>
inline SPROUT_CONSTEXPR Elem
get_param(RandomAccessIterator found, sprout::array<std::size_t, K> const& sizes, std::size_t idx, Args const&... args) {
return found == sizes.end() ? static_cast<Elem>('\0')
: sprout::detail::param_seq_at<Elem>(
found - sizes.begin(),
idx - (found != sizes.begin() ? found[-1] : 0),
args...
)
;
}
} // namespace detail
namespace detail {
template<typename Elem, std::size_t N, sprout::index_t... Indexes, std::size_t K, typename... Args>
inline SPROUT_CONSTEXPR sprout::basic_string<Elem, N>
output_impl_1(sprout::index_tuple<Indexes...>, sprout::array<std::size_t, K> const& sizes, Args const&... args) {
typedef sprout::detail::string_construct_access<Elem, N> access_type;
return access_type::raw_construct(
NS_SSCRISK_CEL_OR_SPROUT::min(sizes.back(), N),
sprout::io::detail::get_param<Elem>(
sprout::range::lower_bound(sizes, static_cast<std::size_t>(Indexes + 1)),
sizes,
Indexes,
args...
)...
);
}
template<typename Elem, std::size_t N, typename... Args>
inline SPROUT_CONSTEXPR sprout::basic_string<Elem, N>
output_impl(Args const&... args) {
return sprout::io::detail::output_impl_1<Elem, N>(
sprout::make_index_tuple<N>::make(),
sprout::range::partial_sum(
sprout::array<std::size_t, sizeof...(Args)>{{args.size()...}},
sprout::pit<sprout::array<std::size_t, sizeof...(Args)> >()
),
args...
);
}
template<typename Elem, std::size_t N, typename Expression, sprout::index_t... Indexes>
inline SPROUT_CONSTEXPR sprout::basic_string<Elem, N>
output(Expression const& expr, sprout::index_tuple<Indexes...>) {
return sprout::io::detail::output_impl<Elem, N>(
sprout::io::eval<Elem, N>(sprout::io::get_leaf<Indexes>(expr))...
);
}
} // namespace detail
//
// output
//
template<std::size_t N, typename Elem, typename Expression>
inline SPROUT_CONSTEXPR sprout::basic_string<Elem, N>
output(Expression const& expr) {
return sprout::io::detail::output<Elem, N>(
expr,
sprout::make_index_tuple<sprout::io::leaf_count<Expression>::value>::make()
);
}
} // namespace io
} // namespace sprout
#endif // #ifndef SPROUT_IO_HPP