• DLearner (8/8) Sep 15 2021 Please confirm that if the addition of two uint variables
• rikki cattermole (5/5) Sep 15 2021 https://dlang.org/spec/expression.html#add_expressions
• Steven Schveighoffer (7/14) Sep 15 2021 Definition under point 7 here :
• DLearner (1/1) Sep 15 2021 Thanks for the responses.

DLearner <bmqazwsx123 gmail.com> writes:

Please confirm that if the addition of two uint variables 
produces a result larger than can be held in a uint:
1.  This is a D-legal operation (however inadvisable!), with the 
D-defined result of wraparound;
2.  Emphasing 1. above: the result is not undefined, or an error 
(by the rules of D), or simply implementation-dependant (whether 
by compiler or chip).

Best regards

rikki cattermole <rikki cattermole.co.nz> writes:

https://dlang.org/spec/expression.html#add_expressions

"7. If both operands are of integral types and an overflow or underflow 
occurs in the computation, wrapping will happen. For example, uint.max + 
1 == uint.min, uint.min - 1 == uint.max, int.max + 1 == int.min, and 
int.min - 1 == int.max."

Steven Schveighoffer <schveiguy gmail.com> writes:

On Wednesday, 15 September 2021 at 10:08:13 UTC, DLearner wrote:
 Please confirm that if the addition of two uint variables 
 produces a result larger than can be held in a uint:
 1.  This is a D-legal operation (however inadvisable!), with 
 the D-defined result of wraparound;

Definition under point 7 here : 
https://dlang.org/spec/expression.html#add_expressions

And I wouldn’t say inadvisable. It’s defined and if you have a 
good reason to allow that, then you can do that.

 2.  Emphasing 1. above: the result is not undefined, or an 
 error (by the rules of D), or simply implementation-dependant 
 (whether by compiler or chip).

Yes

-Steve

DLearner <bmqazwsx123 gmail.com> writes:

Thanks for the responses.