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b55ed69c92
- fixes #14769 # Description ## Bugs - `str substring 0..<0` When passed a range containing no elements, for non-zero cases `str substring` behaves correctly: ```nushell ("hello world" | str substring 1..<1) == "" # => true ``` but if the range is `0..<0`, it returns the whole string instead ```nushell "hello world" | str substring 0..<0 # => hello world ``` - `[0 1 2] | range 0..<0` Similar behavior to `str substring` - `str index-of` - off-by-one on end bounds - underflow on negative start bounds - `bytes at` has inconsistent behavior, works correctly when the size is known, returns one byte less when it's not known (streaming) This can be demonstrated by comparing the outputs of following snippets ```nushell "hello world" | into binary | bytes at ..<5 | decode # => hello "hello world" | into binary | chunks 1 | bytes collect | bytes at ..<5 | decode # => hell ``` - `bytes at` panics on decreasing (`5..3`) ranges if the input size is known. Does not panic with streaming input. ## Changes - implement `FromValue` for `IntRange`, as it is very common to use integer ranges as arguments - `IntRange::absolute_start` can now point one-past-end - `IntRange::absolute_end` converts relative `Included` bounds to absolute `Excluded` bounds - `IntRange::absolute_bounds` is a convenience method that calls the other `absolute_*` methods and transforms reverse ranges to empty at `start` (`5..3` => `5..<5`) - refactored `str substring` tests to allow empty exclusive range tests - fix the `0..<0` case for `str substring` and `str index-of` - `IntRange::distance` never returns `Included(0)` As a general rule `Included(n) == Excluded(n + 1)`. This makes returning `Included(0)` bug prone as users of the function will likely rely on this general rule and cause bugs. - `ByteStream::slice` no longer has an off-by-one on inputs without a known size. This affected `bytes at`. - `bytes at` no longer panics on reverse ranges - `bytes at` is now consistent between streaming and non streaming inputs. # User-Facing Changes There should be no noticeable changes other than the bugfix. # Tests + Formatting - 🟢 toolkit fmt - 🟢 toolkit clippy - 🟢 toolkit test - 🟢 toolkit test stdlib # After Submitting N/A |
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nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.