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fix: do not duplicate empty line in err msg

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ToruNiina 2024-06-20 21:11:43 +09:00
parent 995b25efe0
commit d023a93e3c
1 changed files with 42 additions and 5 deletions
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47
include/toml11/impl/region_impl.hpp
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@ -126,16 +126,53 @@ TOML11_INLINE std::vector<std::string> region::as_lines() const
assert(this->is_ok());
if(this->length_ == 0)
{
return {""};
return std::vector<std::string>{""};
}
const auto begin = std::next(this->source_->cbegin(), static_cast<difference_type>(this->first_));
const auto end = std::next(this->source_->cbegin(), static_cast<difference_type>(this->last_ ));
// Consider the following toml file
// ```
// array = [
// ] # comment
// ```
// and the region represnets
// ```
// [
// ]
// ```
// but we want to show the following.
// ```
// array = [
// ] # comment
// ```
// So we need to find LFs before `begin` and after `end`.
//
// But, if region ends with LF, it should not include the next line.
// ```
// a = 42
// ^^^- with the last LF
// ```
// So we start from `end-1` when looking for LF.
const auto line_begin = std::find(cxx::make_reverse_iterator(begin), this->source_->crend(), char_type('\n'));
const auto begin_idx = static_cast<difference_type>(this->first_);
const auto end_idx = static_cast<difference_type>(this->last_) - 1;
// length_ != 0, so begin < end. then begin <= end-1
assert(begin_idx <= end_idx);
const auto begin = std::next(this->source_->cbegin(), begin_idx);
const auto end = std::next(this->source_->cbegin(), end_idx);
const auto line_begin = std::find(cxx::make_reverse_iterator(begin), this->source_->crend(), char_type('\n')).base();
const auto line_end = std::find(end, this->source_->cend(), char_type('\n'));
std::istringstream iss(make_string(line_begin.base(), line_end));
const auto reg_lines = make_string(line_begin, line_end);
if(reg_lines == "") // the region is an empty line that only contains LF
{
return std::vector<std::string>{""};
}
std::istringstream iss(reg_lines);
std::vector<std::string> lines;
std::string line;