Operator Imp (Implication)operator

Returns the bitwise-and (implication) of two numeric values

Operatorsoperatordocumented

Syntax

Declare Operator Imp ( ByRef lhs As T1, ByRef rhs As T2 ) As Ret

Parameters

Name		Description
`lhs`		The left-hand side expression.
`T1`		Any numeric or boolean type.
`rhs`		The right-hand side expression.
`T2`		Any numeric or boolean type.
`Ret`		A numeric or boolean type (varies with
`T1`		and
`T2`		).

Return value

Returns the bitwise-implication of the two operands.

Description

This operator returns the bitwise-implication of its operands, a logical operation that results in a value with bits set depending on the bits of the operands (for conversion of a boolean to an integer, false or true boolean value becomes 0 or -1 integer value).

The truth table below demonstrates all combinations of a boolean-implication operation:

Lhs Bit	Rhs Bit	Result
0	0	1
1	0	0
0	1	1
1	1	1

No short-circuiting is performed - both expressions are always evaluated.

The return type depends on the types of values passed. Byte, UByte and floating-point type values are first converted to Integer. If the left and right-hand side types differ only in signedness, then the return type is the same as the left-hand side type (T1), otherwise, the larger of the two types is returned. Only if the left and right-hand side types are both Boolean, the return type is also Boolean.

This operator can be overloaded for user-defined types.

Remarks

Usage



result = lhs Imp rhs

Dialect Differences

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

Differences from QB

None

Example

Dim As UByte a, b, c

a = &b00001111

b = &b01010101

c = a Imp b '' c = &b11110101

Reference

Documented in KeyPgOpImp.html