NumberMatch.h File Reference

Doxygen only documents namespace-scope entities (enums, aliases, constants, free functions) in a header that carries this block. More...

#include "entities/match/MatcherType.h"

Enumerations
enum class	sfs3::entities::match::NumberMatch {   EQUALS , NOT_EQUALS , GREATER_THAN , GREATER_THAN_OR_EQUAL_TO ,   LESS_THAN , LESS_THAN_OR_EQUAL_TO }
	The NumberMatch conditions are used in matching expressions to check numeric values. More...

Functions
const char *	sfs3::entities::match::symbolOf (NumberMatch condition)
	Returns the condition symbol of the passed matcher, as sent to the server and rendered by MatchExpression::toString().

Detailed Description

Doxygen only documents namespace-scope entities (enums, aliases, constants, free functions) in a header that carries this block.

Enumeration Type Documentation

NumberMatch

enum class sfs3::entities::match::NumberMatch

strong

The NumberMatch conditions are used in matching expressions to check numeric values.

NOTE: every numeric comparison is performed on double values. The value passed to the matching expression travels on the wire as a double, and the server widens the variable or property it is compared against to a double too, whatever its declared type (byte, short, int, long, float or double). Two consequences are worth knowing:

• comparing a float variable with EQUALS is unreliable, because widening a float to a double exposes its binary representation error (a variable holding 0.1f becomes 0.10000000149011612, which does not equal the 0.1 sent from here). Prefer a range comparison;
• integer values above 2^53 lose precision, so two distinct values may compare as equal.

See also

MatchExpression

Enumerator
EQUALS	Represents the following condition: number1 == number2.
NOT_EQUALS	Represents the following condition: number1 != number2.
GREATER_THAN	Represents the following condition: number1 > number2.
GREATER_THAN_OR_EQUAL_TO	Represents the following condition: number1 >= number2.
LESS_THAN	Represents the following condition: number1 < number2.
LESS_THAN_OR_EQUAL_TO	Represents the following condition: number1 <= number2.