check.h File Reference

#include <attributes.h>
#include <cassert>
#include <stdexcept>
#include <string>
#include <string_view>
#include <utility>

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Classes
class	NonFatalCheckError

Macros
#define	STR_INTERNAL_BUG(msg)
#define	CHECK_NONFATAL(condition)
	Identity function.
#define	Assert(val)
	Identity function.
#define	Assume(val)
	Assume is the identity function.
#define	NONFATAL_UNREACHABLE()
	NONFATAL_UNREACHABLE() is a macro that is used to mark unreachable code.

Functions
std::string	StrFormatInternalBug (std::string_view msg, std::string_view file, int line, std::string_view func)
template<typename T >
T &&	inline_check_non_fatal (LIFETIMEBOUND T &&val, const char *file, int line, const char *func, const char *assertion)
	Helper for CHECK_NONFATAL()
void	assertion_fail (std::string_view file, int line, std::string_view func, std::string_view assertion)
	Helper for Assert()
template<bool IS_ASSERT, typename T >
T &&	inline_assertion_check (LIFETIMEBOUND T &&val, const char *file, int line, const char *func, const char *assertion)
	Helper for Assert()/Assume()

Macro Definition Documentation

Assert

#define Assert

(

val

)

Value:

inline_assertion_check<true>(val, __FILE__, __LINE__, __func__, #val)

Identity function.

Abort if the value compares equal to zero

Definition at line 77 of file check.h.

Assume

#define Assume

(

val

)

Value:

inline_assertion_check<false>(val, __FILE__, __LINE__, __func__, #val)

Assume is the identity function.

• Should be used to run non-fatal checks. In debug builds it behaves like Assert()/assert() to notify developers and testers about non-fatal errors. In production it doesn't warn or log anything.
• For fatal errors, use Assert().
• For non-fatal errors in interactive sessions (e.g. RPC or command line interfaces), CHECK_NONFATAL() might be more appropriate.

Definition at line 89 of file check.h.

CHECK_NONFATAL

#define CHECK_NONFATAL

(

condition

)

Value:

    inline_check_non_fatal(condition, __FILE__, __LINE__, __func__, #condition)

Identity function.

Throw a NonFatalCheckError when the condition evaluates to false

This should only be used

• where the condition is assumed to be true, not for error handling or validating user input
• where a failure to fulfill the condition is recoverable and does not abort the program

For example in RPC code, where it is undesirable to crash the whole program, this can be generally used to replace asserts or recoverable logic errors. A NonFatalCheckError in RPC code is caught and passed as a string to the RPC caller, which can then report the issue to the developers.

Definition at line 73 of file check.h.

NONFATAL_UNREACHABLE

#define NONFATAL_UNREACHABLE

(

)

Value:

    throw NonFatalCheckError(                                         \
        "Unreachable code reached (non-fatal)", __FILE__, __LINE__, __func__)

NONFATAL_UNREACHABLE() is a macro that is used to mark unreachable code.

It throws a NonFatalCheckError.

Definition at line 94 of file check.h.

STR_INTERNAL_BUG

#define STR_INTERNAL_BUG

(

msg

)

Value:

StrFormatInternalBug((msg), __FILE__, __LINE__, __func__)

Definition at line 60 of file check.h.

Function Documentation

assertion_fail()

void assertion_fail	(	std::string_view	file,
		int	line,
		std::string_view	func,
		std::string_view	assertion )

Helper for Assert()

Definition at line 30 of file check.cpp.

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inline_assertion_check()

template<bool IS_ASSERT, typename T >

T && inline_assertion_check	(	LIFETIMEBOUND T &&	val,
		const char *	file,
		int	line,
		const char *	func,
		const char *	assertion )

Helper for Assert()/Assume()

Definition at line 43 of file check.h.

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inline_check_non_fatal()

template<typename T >

T && inline_check_non_fatal	(	LIFETIMEBOUND T &&	val,
		const char *	file,
		int	line,
		const char *	func,
		const char *	assertion )

Helper for CHECK_NONFATAL()

Definition at line 26 of file check.h.

StrFormatInternalBug()

std::string StrFormatInternalBug	(	std::string_view	msg,
		std::string_view	file,
		int	line,
		std::string_view	func )

Definition at line 17 of file check.cpp.

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