Operator EQV= (Equivalence and Assign)

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgOpCombineEqv
• Last revised: 2019-09-27

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Performs a bitwise-eqv (equivalence) and assigns the result to a variable

Syntax

` declare operator Eqv= ( byref lhs as T1, byref rhs as T2 )

`

Usage

` lhs Eqv= rhs

`

Parameters

lhs

The variable to assign to.

T1

Any numeric or boolean type.

rhs

The value to perform a bitwise-eqv (equivalence) with lhs.

T2

Any numeric or boolean type.

Description

This operator performs a bitwise-eqv and assigns the result to a variable (for conversion of a boolean to an integer, false or true boolean value becomes 0 or -1 integer value). It is functionally equivalent to:

lhs = lhs eqv rhs

Eqv= compares each bit of its operands, lhs and rhs, and if both bits are the same (either both 0 or both 1), then the corresponding bit in the first operand, lhs, is set to 1, otherwise it is set to 0.

This operator can be overloaded for user-defined types as a member Operator using the appropriate syntax.

Note: Similarly to the operator '=[>]' (assign), the alternative symbol 'Eqv=>' can be also used.

Examples

start GeSHi

Dim As UByte a = &b00110011
Dim As UByte b = &b01010101
a Eqv= b
'' Result    a = &b10011001
Print Bin(a)

end GeSHi

Dialect Differences

• In the -lang qb dialect, this operator cannot be overloaded.

Differences from QB

• New to FreeBASIC

See also

• Eqv

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