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Operator Imp (Implication)←オリジナル・サイト
2つの数値の、ビット Imp (論理包含)を返します。
構文:
用法:
result = lhs Imp rhs
パラメタ:
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.
Examples:
Dim As UByte a, b, c
a = &b00001111
b = &b01010101
c = a Imp b '' c = &b11110101
Dialect Differences:
- In the -lang qb dialect, this operator cannot be overloaded.
Differences from QB:
See also:
