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regex 1.9.2

An implementation of regular expressions for Rust. This implementation uses finite automata and guarantees linear time matching on all inputs.
Documentation 
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# These tests check that regex engines perform as expected when the search is
# instructed to only search a substring of a haystack instead of the entire
# haystack. This tends to exercise interesting edge cases that are otherwise
# difficult to provoke. (But not necessarily impossible. Regex search iterators
# for example, make use of the "search just a substring" APIs by changing the
# starting position of a search to the end position of the previous match.)

[[test]]
name = "unicode-word-start"
regex = '\b[0-9]+\b'
haystack = "β123"
bounds = { start = 2, end = 5 }
matches = []

[[test]]
name = "unicode-word-end"
regex = '\b[0-9]+\b'
haystack = "123β"
bounds = { start = 0, end = 3 }
matches = []

[[test]]
name = "ascii-word-start"
regex = '\b[0-9]+\b'
haystack = "β123"
bounds = { start = 2, end = 5 }
matches = [[2, 5]]
unicode = false

[[test]]
name = "ascii-word-end"
regex = '\b[0-9]+\b'
haystack = "123β"
bounds = { start = 0, end = 3 }
matches = [[0, 3]]
unicode = false