cpp-taskflow/taskflow/error/error.hpp at master · busySZl/cpp-taskflow · GitHub

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#pragma once

#include <iostream>

#include <sstream>

#include <exception>

#include <system_error>

namespace tf {

/**

@struct Error

@brief The error category of taskflow.

struct Error : public std::error_category {

/**

@enum Code

@brief Error code definition.

enum Code : int {

SUCCESS = 0,

TASKFLOW,

EXECUTOR

};

/**

@brief returns the name of the taskflow error category

inline const char* name() const noexcept override final;

/**

@brief acquires the singleton instance of the taskflow error category

inline static const std::error_category& get();

/**

@brief query the human-readable string of each error code

inline std::string message(int) const override final;

};

// Function: name

inline const char* Error::name() const noexcept {

return "Taskflow error";

}

// Function: get

inline const std::error_category& Error::get() {

static Error instance;

return instance;

}

// Function: message

inline std::string Error::message(int code) const {

switch(auto ec = static_cast<Error::Code>(code); ec) {

case SUCCESS:

return "success";

break;

case TASKFLOW:

return "taskflow error";

break;

case EXECUTOR:

return "executor error";

break;

default:

return "unknown";

break;

};

}

// Function: make_error_code

// Argument dependent lookup.

inline std::error_code make_error_code(Error::Code e) {

return std::error_code(static_cast<int>(e), Error::get());

}

} // end of namespace tf ----------------------------------------------------

// Register for implicit conversion

namespace std {

template <>

struct is_error_code_enum<tf::Error::Code> : true_type {};

}

// ----------------------------------------------------------------------------

namespace tf {

// Procedure: throw_se

// Throws the system error under a given error code.

template <typename... ArgsT>

void throw_se(const char* fname, const size_t line, Error::Code c, ArgsT&&... args) {

std::ostringstream oss;

oss << "[" << fname << ":" << line << "] ";

(oss << ... << args);

throw std::system_error(c, oss.str());

}

} // ------------------------------------------------------------------------

#define TF_THROW(...) tf::throw_se(__FILE__, __LINE__, __VA_ARGS__);

cpp-taskflow/taskflow/error/error.hpp at master · busySZl/cpp-taskflow · GitHub

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