The operator symbol
The left-hand side operand
The right-hand side operand (Rhs is the first argument to Checked)
If rhs != WithNaN.defaultValue!Rhs and the operator does not overflow, the function returns the same result as the built-in operator. In all other cases, returns WithNaN.defaultValue!(typeof(lhs + rhs)).
Checked!(int, WithNaN) x; assert((1 + x).isNaN); x = 100; assert(!(1 + x).isNaN);
Defines hooks for binary operators +, -, *, /, %, ^^, &, |, ^, <<, >>, and >>> for cases where a Checked object is the right-hand side operand. If rhs == WithNaN.defaultValue!Rhs, returns WithNaN.defaultValue!(typeof(lhs + rhs)) without evaluating the operand. Otherwise, evaluates the operand. If evaluation does not overflow, returns the result. Otherwise, returns WithNaN.defaultValue!(typeof(lhs + rhs)).