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Commit ca3dacba authored by Victor Zverovich's avatar Victor Zverovich
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Remove algorithm.hpp

parent 6d47e093
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Showing with 13 additions and 254 deletions
src/text/boost/text/algorithm.hpp deleted 100644 → 0
View file @ 6d47e093
#ifndef BOOST_TEXT_ALGORITHM_HPP
#define BOOST_TEXT_ALGORITHM_HPP
#include <boost/text/detail/sentinel_tag.hpp>
#include <cstddef>
#include <iterator>
namespace boost { namespace text {
namespace detail {
template<typename Iter>
std::ptrdiff_t distance(Iter first, Iter last, non_sentinel_tag)
{
return std::distance(first, last);
}
template<typename Iter, typename Sentinel>
std::ptrdiff_t distance(Iter first, Sentinel last, sentinel_tag)
{
std::ptrdiff_t retval = 0;
while (first != last) {
++retval;
++first;
}
return retval;
}
}
/** Range-friendly version of `std::distance()`, taking an iterator and a
sentinel. */
template<typename Iter, typename Sentinel>
std::ptrdiff_t distance(Iter first, Sentinel last)
{
return detail::distance(
first,
last,
typename std::conditional<
std::is_same<Iter, Sentinel>::value,
detail::non_sentinel_tag,
detail::sentinel_tag>::type());
}
/** Range-friendly version of `std::find()`, taking an iterator and a
sentinel. */
template<typename BidiIter, typename Sentinel, typename T>
BidiIter find(BidiIter first, Sentinel last, T const & x)
{
while (first != last) {
if (*first == x)
return first;
++first;
}
return first;
}
/** A range-friendly compliment to `std::find()`; returns an iterator to
the first element not equal to `x`. */
template<typename BidiIter, typename Sentinel, typename T>
BidiIter find_not(BidiIter first, Sentinel last, T const & x)
{
while (first != last) {
if (*first != x)
return first;
++first;
}
return first;
}
/** Range-friendly version of `std::find_if()`, taking an iterator and a
sentinel. */
template<typename BidiIter, typename Sentinel, typename Pred>
BidiIter find_if(BidiIter first, Sentinel last, Pred p)
{
while (first != last) {
if (p(*first))
return first;
++first;
}
return first;
}
/** Range-friendly version of `std::find_if_not()`, taking an iterator and
a sentinel. */
template<typename BidiIter, typename Sentinel, typename Pred>
BidiIter find_if_not(BidiIter first, Sentinel last, Pred p)
{
while (first != last) {
if (!p(*first))
return first;
++first;
}
return first;
}
/** Analogue of `std::find()` that finds the last value in `[first, last)`
equal to `x`. */
template<typename BidiIter, typename T>
BidiIter find_backward(BidiIter first, BidiIter last, T const & x)
{
auto it = last;
while (it != first) {
if (*--it == x)
return it;
}
return last;
}
/** Analogue of `std::find()` that finds the last value in `[first, last)`
not equal to `x`. */
template<typename BidiIter, typename T>
BidiIter find_not_backward(BidiIter first, BidiIter last, T const & x)
{
auto it = last;
while (it != first) {
if (*--it != x)
return it;
}
return last;
}
/** Analogue of `std::find()` that finds the last value `v` in `[first,
last)` for which `p(v)` is true. */
template<typename BidiIter, typename Pred>
BidiIter find_if_backward(BidiIter first, BidiIter last, Pred p)
{
auto it = last;
while (it != first) {
if (p(*--it))
return it;
}
return last;
}
/** Analogue of `std::find()` that finds the last value `v` in `[first,
last)` for which `p(v)` is false. */
template<typename BidiIter, typename Pred>
BidiIter find_if_not_backward(BidiIter first, BidiIter last, Pred p)
{
auto it = last;
while (it != first) {
if (!p(*--it))
return it;
}
return last;
}
/** A utility range type returned by `foreach_subrange*()`. */
template<typename Iter, typename Sentinel = Iter>
struct foreach_subrange_range
{
using iterator = Iter;
using sentinel = Sentinel;
foreach_subrange_range() {}
foreach_subrange_range(iterator first, sentinel last) :
first_(first),
last_(last)
{}
iterator begin() const noexcept { return first_; }
sentinel end() const noexcept { return last_; }
private:
iterator first_;
sentinel last_;
};
/** Calls `f(sub)` for each subrange `sub` in `[first, last)`. A subrange
is a contiguous subsequence of elements that each compares equal to
the first element of the subsequence. Subranges passed to `f` are
non-overlapping. */
template<typename FwdIter, typename Sentinel, typename Func>
Func foreach_subrange(FwdIter first, Sentinel last, Func f)
{
while (first != last) {
auto const & x = *first;
auto const next = find_not(first, last, x);
if (first != next)
f(foreach_subrange_range<FwdIter, Sentinel>(first, next));
first = next;
}
return f;
}
/** Calls `f(sub)` for each subrange `sub` in `[first, last)`. A subrange
is a contiguous subsequence of elements that for each element `e`,
`proj(e)` each compares equal to `proj()` of the first element of the
subsequence. Subranges passed to `f` are non-overlapping. */
template<typename FwdIter, typename Sentinel, typename Func, typename Proj>
Func foreach_subrange(FwdIter first, Sentinel last, Func f, Proj proj)
{
using value_type = typename std::iterator_traits<FwdIter>::value_type;
while (first != last) {
auto const & x = proj(*first);
auto const next = find_if_not(
first, last, [&x, proj](const value_type & element) {
return proj(element) == x;
});
if (first != next)
f(foreach_subrange_range<FwdIter, Sentinel>(first, next));
first = next;
}
return f;
}
/** Calls `f(sub)` for each subrange `sub` in `[first, last)`. A subrange
is a contiguous subsequence of elements, each of which is equal to
`x`. Subranges passed to `f` are non-overlapping. */
template<typename FwdIter, typename Sentinel, typename T, typename Func>
Func foreach_subrange_of(FwdIter first, Sentinel last, T const & x, Func f)
{
while (first != last) {
first = find(first, last, x);
auto const next = find_not(first, last, x);
if (first != next)
f(foreach_subrange_range<FwdIter, Sentinel>(first, next));
first = next;
}
return f;
}
/** Calls `f(sub)` for each subrange `sub` in `[first, last)`. A subrange
is a contiguous subsequence of elements `ei` for which `p(ei)` is
true. Subranges passed to `f` are non-overlapping. */
template<typename FwdIter, typename Sentinel, typename Pred, typename Func>
Func foreach_subrange_if(FwdIter first, Sentinel last, Pred p, Func f)
{
while (first != last) {
first = boost::text::find_if(first, last, p);
auto const next = boost::text::find_if_not(first, last, p);
if (first != next)
f(foreach_subrange_range<FwdIter, Sentinel>(first, next));
first = next;
}
return f;
}
/** Sentinel-friendly version of `std::all_of()`. */
template<typename Iter, typename Sentinel, typename Pred>
bool all_of(Iter first, Sentinel last, Pred p)
{
for (; first != last; ++first) {
if (!p(*first))
return false;
}
return true;
}
}}
#endif
src/text/boost/text/grapheme_break.hpp
View file @ ca3dacba
#ifndef BOOST_TEXT_GRAPHEME_BREAK_HPP
#define BOOST_TEXT_GRAPHEME_BREAK_HPP
#include <boost/text/algorithm.hpp>
#include <boost/text/config.hpp>
#include <array>
......@@ -12,6 +11,19 @@
namespace boost { namespace text {
/** Analogue of `std::find()` that finds the last value `v` in `[first,
last)` for which `p(v)` is true. */
template<typename BidiIter, typename Pred>
BidiIter find_if_backward(BidiIter first, BidiIter last, Pred p)
{
auto it = last;
while (it != first) {
if (p(*--it))
return it;
}
return last;
}
/** The grapheme properties defined by Unicode. */
enum class grapheme_property {
Other,
......
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