AuroraMiddleware/toml11
1
0
Fork 0
mirror of https://github.com/ToruNiina/toml11.git synced 2024-11-09 22:30:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

feat: add toml::basic_value::try_at

Browse Source
This commit is contained in:
ToruNiina 2024-06-25 23:50:28 +09:00
parent e004eaf006
commit 0e84d0591b
1 changed files with 89 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

89
include/toml11/value.hpp
View File

@ -50,6 +50,9 @@ error_info make_type_error(const basic_value<TC>&, const std::string&, const val
template<typename TC>
error_info make_not_found_error(const basic_value<TC>&, const std::string&, const std::string&);
template<typename TC>
error_info make_not_found_error(const basic_value<TC>&, const std::string&, const std::size_t);
template<typename TC>
void change_region_of_value(basic_value<TC>&, const basic_value<TC>&);
@ -1613,6 +1616,44 @@ class basic_value
assert(found->first == k);
return found->second;
}
result<std::reference_wrapper<value_type>, error_info>
try_at(const key_type& k) noexcept
{
if(!this->is_table())
{
return err(detail::make_type_error(*this,
"toml::value::try_at(key_type)", value_t::table));
}
auto& table = this->as_table(std::nothrow);
const auto found = table.find(k);
if(found == table.end())
{
return err(detail::make_not_found_error(*this,
"toml::value::try_at(key_type)", k));
}
assert(found->first == k);
return ok(std::ref(found->second));
}
result<std::reference_wrapper<const value_type>, error_info>
try_at(const key_type& k) const noexcept
{
if(!this->is_table())
{
return err(detail::make_type_error(*this,
"toml::value::try_at(key_type)", value_t::table));
}
const auto& table = this->as_table(std::nothrow);
const auto found = table.find(k);
if(found == table.end())
{
return err(detail::make_not_found_error(*this,
"toml::value::try_at(key_type)", k));
}
assert(found->first == k);
return ok(std::cref(found->second));
}
value_type& operator[](const key_type& k)
{
if(this->is_empty())
@ -1688,6 +1729,41 @@ class basic_value
return ar.at(idx);
}
result<std::reference_wrapper<value_type>, error_info>
try_at(const std::size_t& idx) noexcept
{
if(!this->is_array())
{
return err(detail::make_type_error(*this,
"toml::value::try_at(key_type)", value_t::array));
}
auto& ar = this->as_array(std::nothrow);
if(ar.size() <= idx)
{
return err(detail::make_not_found_error(*this,
"toml::value::try_at(idx)", idx));
}
return ok(std::ref(ar[idx]));
}
result<std::reference_wrapper<const value_type>, error_info>
try_at(const std::size_t idx) const noexcept
{
if(!this->is_array())
{
return err(detail::make_type_error(*this,
"toml::value::try_at(key_type)", value_t::array));
}
const auto& ar = this->as_array(std::nothrow);
if(ar.size() <= idx)
{
return err(detail::make_not_found_error(*this,
"toml::value::try_at(idx)", idx));
}
return ok(std::cref(ar[idx]));
}
value_type& operator[](const std::size_t idx) noexcept
{
// no check...
@ -2092,6 +2168,19 @@ error_info make_not_found_error(const basic_value<TC>& v, const std::string& fna
}
return error_info(title, locs);
}
template<typename TC>
error_info make_not_found_error(const basic_value<TC>& v, const std::string& fname, const std::size_t idx)
{
if( ! v.is_array())
{
return make_type_error(v, fname, toml::value_t::array);
}
std::ostringstream oss;
oss << "actual length (" << v.as_array(std::nothrow).size()
<< ") is shorter than the specified index (" << idx << ").";
return make_error_info(fname + ": no element corresponding to the index",
v, oss.str());
}
#define TOML11_DETAIL_GENERATE_COMPTIME_GETTER(ty) \
template<typename TC> \