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feat: throw informative error from value.at(...)

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ToruNiina
2020-03-21 17:09:04 +09:00
parent c2151cab0b
commit 5f5539d402
1 changed files with 53 additions and 0 deletions
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53
toml/value.hpp
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@@ -1691,10 +1691,28 @@ class basic_value
// //
value_type& at(const key& k) value_type& at(const key& k)
{ {
if(!this->is_table())
{
detail::throw_bad_cast<value_t::table>(
"toml::value::at(key): ", this->type_, *this);
}
if(this->as_table().count(k) == 0)
{
detail::throw_key_not_found_error(*this, k);
}
return this->as_table().at(k); return this->as_table().at(k);
} }
value_type const& at(const key& k) const value_type const& at(const key& k) const
{ {
if(!this->is_table())
{
detail::throw_bad_cast<value_t::table>(
"toml::value::at(key): ", this->type_, *this);
}
if(this->as_table().count(k) == 0)
{
detail::throw_key_not_found_error(*this, k);
}
return this->as_table().at(k); return this->as_table().at(k);
} }
value_type& operator[](const key& k) value_type& operator[](const key& k)
@@ -1703,24 +1721,59 @@ class basic_value
{ {
*this = table_type{}; *this = table_type{};
} }
else if(!this->is_table()) // initialized, but not a table
{
detail::throw_bad_cast<value_t::table>(
"toml::value::operator[](key): ", this->type_, *this);
}
return this->as_table()[k]; return this->as_table()[k];
} }
value_type& at(const std::size_t idx) value_type& at(const std::size_t idx)
{ {
if(!this->is_array())
{
detail::throw_bad_cast<value_t::array>(
"toml::value::at(idx): ", this->type_, *this);
}
if(this->as_array().size() <= idx)
{
throw std::out_of_range(detail::format_underline(
"toml::value::at(idx): no element corresponding to the index", {
{this->region_info_.get(),
concat_to_string("the length is ", this->as_array().size(),
", and the specified index is ", idx)}
}));
}
return this->as_array().at(idx); return this->as_array().at(idx);
} }
value_type const& at(const std::size_t idx) const value_type const& at(const std::size_t idx) const
{ {
if(!this->is_array())
{
detail::throw_bad_cast<value_t::array>(
"toml::value::at(idx): ", this->type_, *this);
}
if(this->as_array().size() <= idx)
{
throw std::out_of_range(detail::format_underline(
"toml::value::at(idx): no element corresponding to the index", {
{this->region_info_.get(),
concat_to_string("the length is ", this->as_array().size(),
", and the specified index is ", idx)}
}));
}
return this->as_array().at(idx); return this->as_array().at(idx);
} }
value_type& operator[](const std::size_t idx) noexcept value_type& operator[](const std::size_t idx) noexcept
{ {
// no check...
return this->as_array(std::nothrow)[idx]; return this->as_array(std::nothrow)[idx];
} }
value_type const& operator[](const std::size_t idx) const noexcept value_type const& operator[](const std::size_t idx) const noexcept
{ {
// no check...
return this->as_array(std::nothrow)[idx]; return this->as_array(std::nothrow)[idx];
} }