14.6.4 Bitwise complement operator

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本文详细介绍了C#中位取反操作符~的工作原理及其使用方式。对于形如~x的操作，将通过一元操作符重载解析来选择特定的实现，并将操作数转换为所选操作符的参数类型。此外，还解释了枚举类型如何隐式提供位取反操作符。

For an operation of the form ~x, unary operator overload resolution (?4.2.3)
is applied to select a specific
operator implementation. The operand is converted to the parameter type of
the selected operator, and the
type of the result is the return type of the operator. The predefined
bitwise complement operators are:
int operator ~(int x);
uint operator ~(uint x);
long operator ~(long x);
ulong operator ~(ulong x);
For each of these operators, the result of the operation is the bitwise
complement of x.
Every enumeration type E implicitly provides the following bitwise
complement operator:
E operator ~(E x);
The result of evaluating ~x, where x is an expression of an enumeration
type E with an underlying type U, is
exactly the same as evaluating (E)(~(U)x).