[Issue 24358] New: std.digest on array of arrays surprisingly shallow
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sat Jan 27 04:53:33 UTC 2024
https://issues.dlang.org/show_bug.cgi?id=24358
Issue ID: 24358
Summary: std.digest on array of arrays surprisingly shallow
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P1
Component: phobos
Assignee: nobody at puremagic.com
Reporter: schveiguy at gmail.com
std.digest when run on an array of arrays uses a blunt cast to ubyte[], which
means it digests the pointer/lengths, not the contents of the subarrays.
This can be surprising, and in some cases, leave a time bomb for future uses,
because strings are interned.
For example:
`assert (md5Of(["hello", "world"]) == md5Of(["hello", "world"]));`
passes
`assert (md5Of(["hello", "world"]) == md5Of(["hello".dup, "world"]));`
fails.
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I propose that digest on an array of items which contain pointers does not just
cast to ubyte[], but rather uses the (slower) range mechanism of applying
digest to each item individually.
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