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/*
* Copyright (C) 2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* 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.
*/
#pragma once
#include "CSSParserToken.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveNumericTypes.h"
#include "CSSPropertyParserConsumer+MetaConsumerDefinitions.h"
#include "CSSPropertyParserOptions.h"
#include <optional>
#include <type_traits>
#include <wtf/Brigand.h>
#include <wtf/StdLibExtras.h>
namespace WebCore {
class CSSCalcSymbolTable;
struct CSSParserContext;
namespace CSSPropertyParserHelpers {
template<typename R, typename Base, typename T, typename... Ts>
struct MetaResolver : Base {
using ResultType = R;
static ResultType resolve(std::variant<T, Ts...>&& consumeResult, CSSPropertyParserOptions options) requires (sizeof...(Ts) > 0)
{
return WTF::switchOn(WTFMove(consumeResult), [&](auto&& value) -> ResultType {
return Base::resolve(WTFMove(value), options);
});
}
static ResultType resolve(T&& consumeResult, CSSPropertyParserOptions options) requires (sizeof...(Ts) == 0)
{
return Base::resolve(WTFMove(consumeResult), options);
}
static ResultType consumeAndResolve(CSSParserTokenRange& range, const CSSParserContext& context, CSSPropertyParserOptions options)
{
auto result = MetaConsumer<T, Ts...>::consume(range, context, { }, options);
if (!result)
return { };
return resolve(WTFMove(*result), options);
}
};
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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