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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
namespace document {
class AlternateSpanList;
class Span;
class SpanList;
class SimpleSpanList;
struct SpanTreeVisitor {
virtual ~SpanTreeVisitor() {}
virtual void visit(const Span &) = 0;
virtual void visit(const SpanList &node) = 0;
virtual void visit(const SimpleSpanList &node) = 0;
virtual void visit(const AlternateSpanList &node) = 0;
};
} // namespace document
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