Acore::Impl::ChatCommands::CommandInvoker Struct Reference

#include "ChatCommand.h"

Public Member Functions
	CommandInvoker ()
template<typename TypedHandler >
	CommandInvoker (TypedHandler &handler)
	CommandInvoker (bool(&handler)(ChatHandler *, char const *))
	operator bool () const
bool	operator() (ChatHandler *chatHandler, std::string_view args) const

Private Types
using	wrapper_func = bool(void *, ChatHandler *, std::string_view)

Private Attributes
wrapper_func *	_wrapper
void *	_handler

Detailed Description

Member Typedef Documentation

wrapper_func

using Acore::Impl::ChatCommands::CommandInvoker::wrapper_func = bool(void*, ChatHandler*, std::string_view)

private

Constructor & Destructor Documentation

CommandInvoker() [1/3]

Acore::Impl::ChatCommands::CommandInvoker::CommandInvoker ( )

inline

: _wrapper(nullptr), _handler(nullptr) {}

CommandInvoker() [2/3]

template<typename TypedHandler >

Acore::Impl::ChatCommands::CommandInvoker::CommandInvoker ( TypedHandler &  handler )

inline

        {
            _wrapper = [](void* handler, ChatHandler* chatHandler, std::string_view argsStr)
            {
                using Tuple = TupleType<TypedHandler>;
 
                Tuple arguments;
                std::get<0>(arguments) = chatHandler;
                ChatCommandResult result = ConsumeFromOffset<Tuple, 1>(arguments, chatHandler, argsStr);
                if (result)
                    return std::apply(reinterpret_cast<TypedHandler*>(handler), std::move(arguments));
                else
                {
                    if (result.HasErrorMessage())
                        SendErrorMessageToHandler(chatHandler, result.GetErrorMessage());
                    return false;
                }
            };
            _handler = reinterpret_cast<void*>(handler);
        }

References _handler, _wrapper, Acore::Impl::ChatCommands::ChatCommandResult::GetErrorMessage(), Acore::Impl::ChatCommands::ChatCommandResult::HasErrorMessage(), and Acore::Impl::ChatCommands::SendErrorMessageToHandler().

CommandInvoker() [3/3]

Acore::Impl::ChatCommands::CommandInvoker::CommandInvoker ( bool(&)(ChatHandler *, char const *)  handler )

inline

        {
            _wrapper = [](void* handler, ChatHandler* chatHandler, std::string_view argsStr)
            {
                // make a copy of the argument string
                // legacy handlers can destroy input strings with strtok
                std::string argsStrCopy(argsStr);
                return reinterpret_cast<bool(*)(ChatHandler*, char const*)>(handler)(chatHandler, argsStrCopy.c_str());
            };
            _handler = reinterpret_cast<void*>(handler);
        }

References _handler, and _wrapper.

Member Function Documentation

operator bool()

Acore::Impl::ChatCommands::CommandInvoker::operator bool ( ) const

inlineexplicit

{ return (_wrapper != nullptr); }

References _wrapper.

operator()()

bool Acore::Impl::ChatCommands::CommandInvoker::operator() ( ChatHandler *  chatHandler, std::string_view  args  ) const

inline

        {
            ASSERT(_wrapper && _handler);
            return _wrapper(_handler, chatHandler, args);
        }

References _handler, _wrapper, and ASSERT.

Member Data Documentation

_handler

void* Acore::Impl::ChatCommands::CommandInvoker::_handler

private

Referenced by CommandInvoker(), and operator()().

_wrapper

wrapper_func* Acore::Impl::ChatCommands::CommandInvoker::_wrapper

private

Referenced by CommandInvoker(), operator bool(), and operator()().