# Regexp

Following files are copied from Go's regexp package (as of `go1.12beta1`):

- backtrack.go
- exec.go
- onepass.go
- regexp.go

The following files have new additions useful for Edwood. They contain
a modified version of Go's NFA matcher.

- runes.go: forward search on runes sub-slice
- runesb.go: backward search on runes sub-slice

All the files listed so far are distributed under Go's license shown below.
All other files (e.g. runes_test.go) are distributed under Edwood's license.

	Copyright (c) 2009 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
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	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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