--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/github.com/dlclark/regexp2/ATTRIB	Sun Jul 23 13:18:53 2023 +0000
@@ -0,0 +1,133 @@
+============
+These pieces of code were ported from dotnet/corefx:
+
+syntax/charclass.go (from RegexCharClass.cs): ported to use the built-in Go unicode classes.  Canonicalize is 
+    a direct port, but most of the other code required large changes because the C# implementation 
+    used a string to represent the CharSet data structure and I cleaned that up in my implementation.
+
+syntax/code.go (from RegexCode.cs): ported literally with various cleanups and layout to make it more Go-ish.
+
+syntax/escape.go (from RegexParser.cs): ported Escape method and added some optimizations.  Unescape is inspired by 
+    the C# implementation but couldn't be directly ported because of the lack of do-while syntax in Go.
+
+syntax/parser.go (from RegexpParser.cs and RegexOptions.cs): ported parser struct and associated methods as 
+    literally as possible. Several language differences required changes.  E.g. lack pre/post-fix increments as 
+    expressions, lack of do-while loops, lack of overloads, etc.
+
+syntax/prefix.go (from RegexFCD.cs and RegexBoyerMoore.cs): ported as literally as possible and added support
+    for unicode chars that are longer than the 16-bit char in C# for the 32-bit rune in Go.
+
+syntax/replacerdata.go (from RegexReplacement.cs): conceptually ported and re-organized to handle differences 
+    in charclass implementation, and fix odd code layout between RegexParser.cs, Regex.cs, and RegexReplacement.cs.
+
+syntax/tree.go (from RegexTree.cs and RegexNode.cs): ported literally as possible.
+
+syntax/writer.go (from RegexWriter.cs): ported literally with minor changes to make it more Go-ish.
+
+match.go (from RegexMatch.cs): ported, simplified, and changed to handle Go's lack of inheritence.
+
+regexp.go (from Regex.cs and RegexOptions.cs): conceptually serves the same "starting point", but is simplified 
+    and changed to handle differences in C# strings and Go strings/runes.  
+
+replace.go (from RegexReplacement.cs): ported closely and then cleaned up to combine the MatchEvaluator and 
+    simple string replace implementations.
+
+runner.go (from RegexRunner.cs): ported literally as possible.
+
+regexp_test.go (from CaptureTests.cs and GroupNamesAndNumbers.cs): conceptually ported, but the code was 
+    manually structured like Go tests.
+
+replace_test.go (from RegexReplaceStringTest0.cs): conceptually ported
+
+rtl_test.go (from RightToLeft.cs): conceptually ported
+---
+dotnet/corefx was released under this license:
+
+The MIT License (MIT)
+
+Copyright (c) Microsoft Corporation
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+============
+These pieces of code are copied from the Go framework:
+
+- The overall directory structure of regexp2 was inspired by the Go runtime regexp package.
+- The optimization in the escape method of syntax/escape.go is from the Go runtime QuoteMeta() func in regexp/regexp.go
+- The method signatures in regexp.go are designed to match the Go framework regexp methods closely
+- func regexp2.MustCompile and func quote are almost identifical to the regexp package versions
+- BenchmarkMatch* and TestProgramTooLong* funcs in regexp_performance_test.go were copied from the framework 
+    regexp/exec_test.go
+---
+The Go framework was released under this license:
+
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+============
+Some test data were gathered from the Mono project.
+
+regexp_mono_test.go: ported from https://github.com/mono/mono/blob/master/mcs/class/System/Test/System.Text.RegularExpressions/PerlTrials.cs
+---
+Mono tests released under this license:
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+