Regex match logic: Rust is_match() vs. JDK matches()

[35VLG84]

JDK

boolean matches() Attempts to match the entire region against the pattern.

Rust

Returns true if and only if there is a match for the regex anywhere in the haystack given.

Rust examples:

In this crate, every regex search is run with an implicit (?s:.)*? at the beginning of its pattern, which allows the regex to match anywhere in a haystack. Anchors, as above, can be used to ensure that the full haystack matches a pattern.

This will make Account Selectors behave differently, and on the other hand, the fix (^pattern$) will change Account Selector Checksums.

[35VLG84]

So the Rust regex must be anchored to have the same behavior as with JDK matches.

^(?:regex-from-network)$ should do the trick,
ref: rust-lang/regex#737 (reply in thread)

The Regex and RegexSets have to be peeled away from that wrapper before calculating the checksum.