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feat: add nocomment and showcomment

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ToruNiina
2019-06-28 19:08:48 +09:00
parent 6182f3ee9d
commit 0502924d25
1 changed files with 34 additions and 2 deletions
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36
toml/serializer.hpp
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@@ -672,6 +672,34 @@ format(const basic_value<C, M, V>& v, std::size_t w = 80u,
return visit(serializer<C, M, V>(w, fprec, force_inline), v);
}
namespace detail
{
template<typename charT, typename traits>
int comment_index(std::basic_ostream<charT, traits>&)
{
static const int index = std::ios_base::xalloc();
return index;
}
} // detail
template<typename charT, typename traits>
std::basic_ostream<charT, traits>&
nocomment(std::basic_ostream<charT, traits>& os)
{
// by default, it is zero. and by defalut, it shows comments.
os.iword(detail::comment_index(os)) = 1;
return os;
}
template<typename charT, typename traits>
std::basic_ostream<charT, traits>&
showcomment(std::basic_ostream<charT, traits>& os)
{
// by default, it is zero. and by defalut, it shows comments.
os.iword(detail::comment_index(os)) = 0;
return os;
}
template<typename charT, typename traits, typename C,
template<typename ...> class M, template<typename ...> class V>
std::basic_ostream<charT, traits>&
@@ -682,7 +710,11 @@ operator<<(std::basic_ostream<charT, traits>& os, const basic_value<C, M, V>& v)
const int fprec = static_cast<int>(os.precision());
os.width(0);
if(v.is_table() && !v.comments().empty())
// by defualt, iword is initialized byl 0. And by default, toml11 outputs
// comments. So `0` means showcomment. 1 means nocommnet.
const bool show_comment = (0 == os.iword(detail::comment_index(os)));
if(show_comment && v.is_table() && !v.comments().empty())
{
os << v.comments();
os << '\n'; // to split the file comment from the first element
@@ -707,7 +739,7 @@ operator<<(std::basic_ostream<charT, traits>& os, const basic_value<C, M, V>& v)
//
// In this case, it is impossible to put comments before key-value pair.
// The only way to preserve comments is to put all of them after a value.
if(!v.is_table() && !v.comments().empty())
if(show_comment && !v.is_table() && !v.comments().empty())
{
os << " #";
for(const auto& c : v.comments()) {os << c;}