Source/WebGPU/WGSL/AST/ASTExpression.h

/*
 * 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
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 * 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
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 */

#pragma once

#include "ASTNode.h"

namespace WGSL {
class TypeChecker;
struct Type;

namespace AST {

class Expression : public Node {
    WTF_MAKE_FAST_ALLOCATED;
    friend TypeChecker;

public:
    using Ref = UniqueRef<Expression>;
    using Ptr = std::unique_ptr<Expression>;
    using List = UniqueRefVector<Expression>;

    Expression(SourceSpan span)
        : Node(span)
    { }

    virtual ~Expression() { }

    const Type* inferredType() const { return m_inferredType; }

private:
    const Type* m_inferredType;
};

} // namespace AST
} // namespace WGSL

SPECIALIZE_TYPE_TRAITS_BEGIN(WGSL::AST::Expression)
static bool isType(const WGSL::AST::Node& node)
{
    switch (node.kind()) {
        // Expressions
    case WGSL::AST::NodeKind::BinaryExpression:
    case WGSL::AST::NodeKind::BitcastExpression:
    case WGSL::AST::NodeKind::IndexAccessExpression:
    case WGSL::AST::NodeKind::CallExpression:
    case WGSL::AST::NodeKind::IdentifierExpression:
    case WGSL::AST::NodeKind::FieldAccessExpression:
    case WGSL::AST::NodeKind::UnaryExpression:
        // Literals
    case WGSL::AST::NodeKind::AbstractFloatLiteral:
    case WGSL::AST::NodeKind::AbstractIntegerLiteral:
    case WGSL::AST::NodeKind::BoolLiteral:
    case WGSL::AST::NodeKind::Float32Literal:
    case WGSL::AST::NodeKind::Signed32Literal:
    case WGSL::AST::NodeKind::Unsigned32Literal:
        return true;
    default:
        return false;
    }
}
SPECIALIZE_TYPE_TRAITS_END()