On 06/07/2013 09:22 AM, Walter Bright wrote:
...
There are two obvious reasons why a feature would not have much buzz:
1. it works perfectly
2. it isn't being used
Value Range Propagation is a pretty good example of (1). Sadly, I
suspect -cov is (2).
I'd be happy to be wrong about that.
You are certainly wrong about the value range propagation part. The
transformers for the bitwise operators are not the best possible.
ubyte x = ((y&252)^2)+1;
The above term can be easily proven to fit into ubyte by just using an
analysis of the ranges of its subterms, yet DMD rejects it.
