this post was submitted on 31 Oct 2023
13 points (100.0% liked)
Programming
13376 readers
1 users here now
All things programming and coding related. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
There are techniques like abstract interpretation that can deduce lower and upper bounds that a value can take. I know there is an analysis in LLVM called ValueAnalysis that does that too - the compiler can use it to help dead code elimination (deducing that a given branch will never be taken because the value will never satisfy the condition so you can get rid of the branch).
But I think these techniques do not work in all use cases. Although you could theoretically invent some syntax to say "I would like this value to be in that range", the compiler would not be able to tell in all cases whether it's satisfied.
If you are interested in a language that has subrange checks at runtime, Ada language can do that. But it does come at a performance cost - if your program is compute bound it can be a problem