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/*
* Copyright (C) 2022 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. AND ITS 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 APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 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 "Expression.h"
#include "TypeDecl.h"
#include <wtf/UniqueRef.h>
#include <wtf/Vector.h>
namespace WGSL::AST {
// A CallableExpression expresses a "function" call, which consists of a target to be called,
// and a list of arguments. The target does not necesserily have to be a function identifier,
// but can also be a type, in which the whole call is a type conversion expression. The exact
// kind of expression can only be resolved during semantic analysis.
class CallableExpression final : public Expression {
WTF_MAKE_FAST_ALLOCATED;
public:
CallableExpression(SourceSpan span, UniqueRef<TypeDecl>&& target, Vector<UniqueRef<Expression>>&& arguments)
: Expression(span)
, m_target(WTFMove(target))
, m_arguments(WTFMove(arguments))
{
}
Kind kind() const override { return Kind::CallableExpression; }
const TypeDecl& target() const { return m_target; }
Vector<std::reference_wrapper<const Expression>> arguments() const
{
Vector<std::reference_wrapper<const Expression>> arguments;
for (const auto& argument : m_arguments)
arguments.append(std::cref(argument.get()));
return arguments;
}
private:
// If m_target is a NamedType, it could either be a:
// * Type that does not accept parameters (bool, i32, u32, ...)
// * Identifier that refers to a type alias.
// * Identifier that refers to a function.
UniqueRef<TypeDecl> m_target;
Vector<UniqueRef<Expression>> m_arguments;
};
} // namespace WGSL::AST
SPECIALIZE_TYPE_TRAITS_WGSL_EXPRESSION(CallableExpression, isCallableExpression())
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