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Throw conversion error when conversion already exists.

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This commit is contained in:
Alek Mosingiewicz 2018-08-07 18:00:58 +02:00
parent 2dfd444178
commit ecd6000d54
1 changed files with 30 additions and 1 deletions
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31
include/chaiscript/dispatchkit/type_conversions.hpp
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@ -30,6 +30,25 @@ namespace chaiscript
{
namespace exception
{
/// \brief Error thrown when there's a problem with type conversion
class conversion_error
{
public:
conversion_error(const Type_Info& t_to, const Type_Info& t_from, const utility::Static_String what): to(t_to),
from(t_from), m_what(std::move(what)) {};
const char * what() const noexcept
{
return m_what.c_str();
}
private:
const Type_Info& to;
const Type_Info& from;
utility::Static_String m_what;
};
class bad_boxed_dynamic_cast : public bad_boxed_cast
{
public:
@ -362,10 +381,14 @@ namespace chaiscript
return cache;
}
void add_conversion(const std::shared_ptr<detail::Type_Conversion_Base> &conversion)
{
chaiscript::detail::threading::unique_lock<chaiscript::detail::threading::shared_mutex> l(m_mutex);
/// \todo error if a conversion already exists
if (has_conversion(conversion)) {
throw exception::conversion_error(conversion->to(), conversion->from(),
"Trying to re-insert an existing conversion!");
}
m_conversions.insert(conversion);
m_convertableTypes.insert({conversion->to().bare_type_info(), conversion->from().bare_type_info()});
m_num_types = m_convertableTypes.size();
@ -452,6 +475,12 @@ namespace chaiscript
return find_bidir(to, from) != m_conversions.end();
}
/// \brief has_conversion overloaded for Type_Conversion_Base parameter
bool has_conversion(const std::shared_ptr<detail::Type_Conversion_Base> &conversion)
{
return has_conversion(conversion->to(), conversion->from());
}
std::shared_ptr<detail::Type_Conversion_Base> get_conversion(const Type_Info &to, const Type_Info &from) const
{
chaiscript::detail::threading::shared_lock<chaiscript::detail::threading::shared_mutex> l(m_mutex);