static E from_string( const std::string &value )
{
const auto iter = BINDINGS.find( value );
if( iter == BINDINGS.end() ) {
// This point shall not be reached. Always call this with valid input.
return BINDINGS.begin()->second;
}
return iter->second;
}
static int index( lua_State * const L )
{
// -1 is the key (funtion to call)
const char * const key = lua_tostring( L, -1 );
if( key == nullptr ) {
luaL_error( L, "Invalid input to __index: key is not a string." );
}
const auto iter = BINDINGS.find( key );
if( iter == BINDINGS.end() ) {
return luaL_error( L, "Invalid enum value." );
}
lua_remove( L, -1 ); // remove key
// Push the enum as string, it will be converted back to the enum later. This way, it can
// be specified both ways in Lua code: either as string or via an entry here.
lua_pushlstring( L, iter->first.c_str(), iter->first.length() );
return 1;
}
