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#ifndef STRING_INL_H_
#error "Direct inclusion of this file is not allowed, include string.h"
// For the sake of sane code completion.
#include "string.h"
#endif
#include "format.h"
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
//! Joins a range of items into a string intermixing them with the delimiter.
/*!
* \param builder String builder where the output goes.
* \param begin Iterator pointing to the first item (inclusive).
* \param end Iterator pointing to the last item (not inclusive).
* \param formatter Formatter to apply to the items.
* \param delimiter A delimiter to be inserted between items: ", " by default.
* \return The resulting combined string.
*/
template <class TIterator, class TFormatter>
void JoinToString(
TStringBuilderBase* builder,
const TIterator& begin,
const TIterator& end,
const TFormatter& formatter,
TStringBuf delimiter)
{
for (auto current = begin; current != end; ++current) {
if (current != begin) {
builder->AppendString(delimiter);
}
formatter(builder, *current);
}
}
template <class TIterator, class TFormatter>
TString JoinToString(
const TIterator& begin,
const TIterator& end,
const TFormatter& formatter,
TStringBuf delimiter)
{
TStringBuilder builder;
JoinToString(&builder, begin, end, formatter, delimiter);
return builder.Flush();
}
//! A handy shortcut with default formatter.
template <class TIterator>
TString JoinToString(
const TIterator& begin,
const TIterator& end,
TStringBuf delimiter)
{
return JoinToString(begin, end, TDefaultFormatter(), delimiter);
}
//! Joins a collection of given items into a string intermixing them with the delimiter.
/*!
* \param collection A collection containing the items to be joined.
* \param formatter Formatter to apply to the items.
* \param delimiter A delimiter to be inserted between items; ", " by default.
*/
template <class TCollection, class TFormatter>
TString JoinToString(
const TCollection& collection,
const TFormatter& formatter,
TStringBuf delimiter)
{
using std::begin;
using std::end;
return JoinToString(begin(collection), end(collection), formatter, delimiter);
}
//! A handy shortcut with the default formatter.
template <class TCollection>
TString JoinToString(
const TCollection& collection,
TStringBuf delimiter)
{
return JoinToString(collection, TDefaultFormatter(), delimiter);
}
//! Concatenates a bunch of TStringBuf-like instances into TString.
template <class... Ts>
TString ConcatToString(Ts... args)
{
size_t length = 0;
((length += args.length()), ...);
TString result;
result.reserve(length);
(result.append(args), ...);
return result;
}
//! Converts a range of items into strings.
template <class TIter, class TFormatter>
std::vector<TString> ConvertToStrings(
const TIter& begin,
const TIter& end,
const TFormatter& formatter,
size_t maxSize)
{
std::vector<TString> result;
for (auto it = begin; it != end; ++it) {
TStringBuilder builder;
formatter(&builder, *it);
result.push_back(builder.Flush());
if (result.size() == maxSize) {
break;
}
}
return result;
}
//! A handy shortcut with the default formatter.
template <class TIter>
std::vector<TString> ConvertToStrings(
const TIter& begin,
const TIter& end,
size_t maxSize)
{
return ConvertToStrings(begin, end, TDefaultFormatter(), maxSize);
}
//! Converts a given collection of items into strings.
/*!
* \param collection A collection containing the items to be converted.
* \param formatter Formatter to apply to the items.
* \param maxSize Size limit for the resulting vector.
*/
template <class TCollection, class TFormatter>
std::vector<TString> ConvertToStrings(
const TCollection& collection,
const TFormatter& formatter,
size_t maxSize)
{
using std::begin;
using std::end;
return ConvertToStrings(begin(collection), end(collection), formatter, maxSize);
}
//! A handy shortcut with default formatter.
template <class TCollection>
std::vector<TString> ConvertToStrings(
const TCollection& collection,
size_t maxSize)
{
return ConvertToStrings(collection, TDefaultFormatter(), maxSize);
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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