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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cases
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import "golang.org/x/text/transform"
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type caseFolder struct{ transform.NopResetter }
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// caseFolder implements the Transformer interface for doing case folding.
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func (t *caseFolder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
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	c := context{dst: dst, src: src, atEOF: atEOF}
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	for c.next() {
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		foldFull(&c)
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		c.checkpoint()
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	}
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	return c.ret()
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}
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func (t *caseFolder) Span(src []byte, atEOF bool) (n int, err error) {
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	c := context{src: src, atEOF: atEOF}
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	for c.next() && isFoldFull(&c) {
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		c.checkpoint()
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	}
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	return c.retSpan()
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}
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func makeFold(o options) transform.SpanningTransformer {
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	// TODO: Special case folding, through option Language, Special/Turkic, or
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	// both.
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	// TODO: Implement Compact options.
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	return &caseFolder{}
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}
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