chromium/third_party/blink/renderer/core/css/cssom/css_unsupported_style_value.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_CSS_UNSUPPORTED_STYLE_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_CSS_UNSUPPORTED_STYLE_VALUE_H_

#include <optional>

#include "base/notreached.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_property_name.h"
#include "third_party/blink/renderer/core/css/cssom/css_style_value.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"

namespace blink {

// CSSUnsupportedStyleValue is the internal representation of a base
// CSSStyleValue that is returned when we do not yet support a CSS Typed OM type
// for a given CSS Value.
//
// It is either:
//
// * Tied to a specific CSS property, and therefore only valid for that
//   property, or
// * Tied to no CSS property at all, in which case it's not valid for any
//   property.

class CORE_EXPORT CSSUnsupportedStyleValue : public CSSStyleValue { … };

template <>
struct DowncastTraits<CSSUnsupportedStyleValue> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_CSS_UNSUPPORTED_STYLE_VALUE_H_