IJsonConvertibleIO.h File Reference

(313315d (Wed Dec 23 23:39:47 2020 -0800))

#include <algorithm>
#include <iterator>
#include <string>
#include "open3d/utility/IJsonConvertible.h"

Go to the source code of this file.

Namespaces
	open3d
	open3d::io

Macros
#define	DECLARE_STRINGIFY_ENUM(ENUM_TYPE)
#define	STRINGIFY_ENUM(ENUM_TYPE, ...)

Functions
bool	open3d::io::ReadIJsonConvertible (const std::string &filename, utility::IJsonConvertible &object)
bool	open3d::io::WriteIJsonConvertible (const std::string &filename, const utility::IJsonConvertible &object)
bool	open3d::io::ReadIJsonConvertibleFromJSON (const std::string &filename, utility::IJsonConvertible &object)
bool	open3d::io::WriteIJsonConvertibleToJSON (const std::string &filename, const utility::IJsonConvertible &object)
bool	open3d::io::ReadIJsonConvertibleFromJSONString (const std::string &json_string, utility::IJsonConvertible &object)
bool	open3d::io::WriteIJsonConvertibleToJSONString (std::string &json_string, const utility::IJsonConvertible &object)

Macro Definition Documentation

DECLARE_STRINGIFY_ENUM

#define DECLARE_STRINGIFY_ENUM

(

ENUM_TYPE

)

Value:

std::string enum_to_string(ENUM_TYPE e); \
    void enum_from_string(const std::string &str, ENUM_TYPE &e);

String to and from enum mapping, based on https://github.com/nlohmann/json/blob/master/include/nlohmann/detail/macro_scope.hpp (MIT license) If you have an enum: enum IMAGE_FORMAT {FORMAT_PNG, FORMAT_JPG}; Use as STRINGIFY_ENUM(IMAGE_FORMAT, { {FORMAT_INVALID, nullptr}, {FORMAT_PNG, "png"}, {FORMAT_JPG, "jpg"} }) in the cpp file and DECLARE_STRINGIFY_ENUM(IMAGE_FORMAT) in the header file. This creates the functions

• enum_to_string(const ENUM_TYPE &e) -> std::string
• enum_from_string(const std::string &str, ENUM_TYPE &e) -> void for conversion between the enum and string. Invalid string values are mapped to the first specified option in the macro.

STRINGIFY_ENUM

#define STRINGIFY_ENUM	(		ENUM_TYPE,
			...
	)

Value:

std::string enum_to_string(ENUM_TYPE e) {                             \
        static_assert(std::is_enum<ENUM_TYPE>::value,                     \
                      #ENUM_TYPE " must be an enum!");                    \
        static const std::pair<ENUM_TYPE, std::string> m[] = __VA_ARGS__; \
        auto it = std::find_if(                                           \
                std::begin(m), std::end(m),                               \
                [e](const std::pair<ENUM_TYPE, std::string> &es_pair)     \
                        -> bool { return es_pair.first == e; });          \
        return ((it != std::end(m)) ? it : std::begin(m))->second;        \
    }                                                                     \
    void enum_from_string(const std::string &str, ENUM_TYPE &e) {         \
        static_assert(std::is_enum<ENUM_TYPE>::value,                     \
                      #ENUM_TYPE " must be an enum!");                    \
        static const std::pair<ENUM_TYPE, std::string> m[] = __VA_ARGS__; \
        auto it = std::find_if(                                           \
                std::begin(m), std::end(m),                               \
                [&str](const std::pair<ENUM_TYPE, std::string> &es_pair)  \
                        -> bool { return es_pair.second == str; });       \
        e = ((it != std::end(m)) ? it : std::begin(m))->first;            \
        utility::LogDebug("{} -> {}", str, e);                            \
    }