Vendor things

third-party/vendor/regex/testdata/iter.toml

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+[[test]]
+name = "1"
+regex = "a"
+haystack = "aaa"
+matches = [[0, 1], [1, 2], [2, 3]]
+
+[[test]]
+name = "2"
+regex = "a"
+haystack = "aba"
+matches = [[0, 1], [2, 3]]
+
+[[test]]
+name = "empty1"
+regex = ''
+haystack = ''
+matches = [[0, 0]]
+
+[[test]]
+name = "empty2"
+regex = ''
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty3"
+regex = '(?:)'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty4"
+regex = '(?:)*'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty5"
+regex = '(?:)+'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty6"
+regex = '(?:)?'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty7"
+regex = '(?:)(?:)'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty8"
+regex = '(?:)+|z'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty9"
+regex = 'z|(?:)+'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty10"
+regex = '(?:)+|b'
+haystack = 'abc'
+matches = [[0, 0], [1, 1], [2, 2], [3, 3]]
+
+[[test]]
+name = "empty11"
+regex = 'b|(?:)+'
+haystack = 'abc'
+matches = [[0, 0], [1, 2], [3, 3]]
+
+[[test]]
+name = "start1"
+regex = "^a"
+haystack = "a"
+matches = [[0, 1]]
+
+[[test]]
+name = "start2"
+regex = "^a"
+haystack = "aa"
+matches = [[0, 1]]
+
+[[test]]
+name = "anchored1"
+regex = "a"
+haystack = "a"
+matches = [[0, 1]]
+anchored = true
+
+# This test is pretty subtle. It demonstrates the crucial difference between
+# '^a' and 'a' compiled in 'anchored' mode. The former regex exclusively
+# matches at the start of a haystack and nowhere else. The latter regex has
+# no such restriction, but its automaton is constructed such that it lacks a
+# `.*?` prefix. So it can actually produce matches at multiple locations.
+# The anchored3 test drives this point home.
+[[test]]
+name = "anchored2"
+regex = "a"
+haystack = "aa"
+matches = [[0, 1], [1, 2]]
+anchored = true
+
+# Unlikely anchored2, this test stops matching anything after it sees `b`
+# since it lacks a `.*?` prefix. Since it is looking for 'a' but sees 'b', it
+# determines that there are no remaining matches.
+[[test]]
+name = "anchored3"
+regex = "a"
+haystack = "aaba"
+matches = [[0, 1], [1, 2]]
+anchored = true
+
+[[test]]
+name = "nonempty-followedby-empty"
+regex = 'abc|.*?'
+haystack = "abczzz"
+matches = [[0, 3], [4, 4], [5, 5], [6, 6]]
+
+[[test]]
+name = "nonempty-followedby-oneempty"
+regex = 'abc|.*?'
+haystack = "abcz"
+matches = [[0, 3], [4, 4]]
+
+[[test]]
+name = "nonempty-followedby-onemixed"
+regex = 'abc|.*?'
+haystack = "abczabc"
+matches = [[0, 3], [4, 7]]
+
+[[test]]
+name = "nonempty-followedby-twomixed"
+regex = 'abc|.*?'
+haystack = "abczzabc"
+matches = [[0, 3], [4, 4], [5, 8]]