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#ifndef SIMDJSON_ERROR_H
#define SIMDJSON_ERROR_H
#include "simdjson/common_defs.h"
#include <string>
namespace simdjson {
/**
* All possible errors returned by simdjson.
*/
enum error_code {
SUCCESS = 0, ///< No error
CAPACITY, ///< This parser can't support a document that big
MEMALLOC, ///< Error allocating memory, most likely out of memory
TAPE_ERROR, ///< Something went wrong while writing to the tape (stage 2), this is a generic error
DEPTH_ERROR, ///< Your document exceeds the user-specified depth limitation
STRING_ERROR, ///< Problem while parsing a string
T_ATOM_ERROR, ///< Problem while parsing an atom starting with the letter 't'
F_ATOM_ERROR, ///< Problem while parsing an atom starting with the letter 'f'
N_ATOM_ERROR, ///< Problem while parsing an atom starting with the letter 'n'
NUMBER_ERROR, ///< Problem while parsing a number
UTF8_ERROR, ///< the input is not valid UTF-8
UNINITIALIZED, ///< unknown error, or uninitialized document
EMPTY, ///< no structural element found
UNESCAPED_CHARS, ///< found unescaped characters in a string.
UNCLOSED_STRING, ///< missing quote at the end
UNSUPPORTED_ARCHITECTURE, ///< unsupported architecture
INCORRECT_TYPE, ///< JSON element has a different type than user expected
NUMBER_OUT_OF_RANGE, ///< JSON number does not fit in 64 bits
INDEX_OUT_OF_BOUNDS, ///< JSON array index too large
NO_SUCH_FIELD, ///< JSON field not found in object
IO_ERROR, ///< Error reading a file
INVALID_JSON_POINTER, ///< Invalid JSON pointer reference
INVALID_URI_FRAGMENT, ///< Invalid URI fragment
UNEXPECTED_ERROR, ///< indicative of a bug in simdjson
/** @private Number of error codes */
NUM_ERROR_CODES
};
/**
* Get the error message for the given error code.
*
* dom::parser parser;
* dom::element doc;
* auto error = parser.parse("foo").get(doc);
* if (error) { printf("Error: %s\n", error_message(error)); }
*
* @return The error message.
*/
inline const char *error_message(error_code error) noexcept;
/**
* Write the error message to the output stream
*/
inline std::ostream& operator<<(std::ostream& out, error_code error) noexcept;
/**
* Exception thrown when an exception-supporting simdjson method is called
*/
struct simdjson_error : public std::exception {
/**
* Create an exception from a simdjson error code.
* @param error The error code
*/
simdjson_error(error_code error) noexcept : _error{error} { }
/** The error message */
const char *what() const noexcept { return error_message(error()); }
/** The error code */
error_code error() const noexcept { return _error; }
private:
/** The error code that was used */
error_code _error;
};
namespace internal {
/**
* The result of a simdjson operation that could fail.
*
* Gives the option of reading error codes, or throwing an exception by casting to the desired result.
*
* This is a base class for implementations that want to add functions to the result type for
* chaining.
*
* Override like:
*
* struct simdjson_result<T> : public internal::simdjson_result_base<T> {
* simdjson_result() noexcept : internal::simdjson_result_base<T>() {}
* simdjson_result(error_code error) noexcept : internal::simdjson_result_base<T>(error) {}
* simdjson_result(T &&value) noexcept : internal::simdjson_result_base<T>(std::forward(value)) {}
* simdjson_result(T &&value, error_code error) noexcept : internal::simdjson_result_base<T>(value, error) {}
* // Your extra methods here
* }
*
* Then any method returning simdjson_result<T> will be chainable with your methods.
*/
template<typename T>
struct simdjson_result_base : public std::pair<T, error_code> {
/**
* Create a new empty result with error = UNINITIALIZED.
*/
really_inline simdjson_result_base() noexcept;
/**
* Create a new error result.
*/
really_inline simdjson_result_base(error_code error) noexcept;
/**
* Create a new successful result.
*/
really_inline simdjson_result_base(T &&value) noexcept;
/**
* Create a new result with both things (use if you don't want to branch when creating the result).
*/
really_inline simdjson_result_base(T &&value, error_code error) noexcept;
/**
* Move the value and the error to the provided variables.
*
* @param value The variable to assign the value to. May not be set if there is an error.
* @param error The variable to assign the error to. Set to SUCCESS if there is no error.
*/
really_inline void tie(T &value, error_code &error) && noexcept;
/**
* Move the value to the provided variable.
*
* @param value The variable to assign the value to. May not be set if there is an error.
*/
really_inline error_code get(T &value) && noexcept;
/**
* The error.
*/
really_inline error_code error() const noexcept;
#if SIMDJSON_EXCEPTIONS
/**
* Get the result value.
*
* @throw simdjson_error if there was an error.
*/
really_inline T& value() noexcept(false);
/**
* Take the result value (move it).
*
* @throw simdjson_error if there was an error.
*/
really_inline T&& take_value() && noexcept(false);
/**
* Cast to the value (will throw on error).
*
* @throw simdjson_error if there was an error.
*/
really_inline operator T&&() && noexcept(false);
#endif // SIMDJSON_EXCEPTIONS
}; // struct simdjson_result_base
} // namespace internal
/**
* The result of a simdjson operation that could fail.
*
* Gives the option of reading error codes, or throwing an exception by casting to the desired result.
*/
template<typename T>
struct simdjson_result : public internal::simdjson_result_base<T> {
/**
* @private Create a new empty result with error = UNINITIALIZED.
*/
really_inline simdjson_result() noexcept;
/**
* @private Create a new error result.
*/
really_inline simdjson_result(T &&value) noexcept;
/**
* @private Create a new successful result.
*/
really_inline simdjson_result(error_code error_code) noexcept;
/**
* @private Create a new result with both things (use if you don't want to branch when creating the result).
*/
really_inline simdjson_result(T &&value, error_code error) noexcept;
/**
* Move the value and the error to the provided variables.
*
* @param value The variable to assign the value to. May not be set if there is an error.
* @param error The variable to assign the error to. Set to SUCCESS if there is no error.
*/
really_inline void tie(T &value, error_code &error) && noexcept;
/**
* Move the value to the provided variable.
*
* @param value The variable to assign the value to. May not be set if there is an error.
*/
WARN_UNUSED really_inline error_code get(T &value) && noexcept;
/**
* The error.
*/
really_inline error_code error() const noexcept;
#if SIMDJSON_EXCEPTIONS
/**
* Get the result value.
*
* @throw simdjson_error if there was an error.
*/
really_inline T& value() noexcept(false);
/**
* Take the result value (move it).
*
* @throw simdjson_error if there was an error.
*/
really_inline T&& take_value() && noexcept(false);
/**
* Cast to the value (will throw on error).
*
* @throw simdjson_error if there was an error.
*/
really_inline operator T&&() && noexcept(false);
#endif // SIMDJSON_EXCEPTIONS
}; // struct simdjson_result
/**
* @deprecated This is an alias and will be removed, use error_code instead
*/
using ErrorValues [[deprecated("This is an alias and will be removed, use error_code instead")]] = error_code;
/**
* @deprecated Error codes should be stored and returned as `error_code`, use `error_message()` instead.
*/
[[deprecated("Error codes should be stored and returned as `error_code`, use `error_message()` instead.")]]
inline const std::string error_message(int error) noexcept;
} // namespace simdjson
#endif // SIMDJSON_ERROR_H