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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 "AST/ShaderModule.h"
#include "AST/Statements/ReturnStatement.h"
#include "Lexer.h"
namespace WGSL {
template<typename Lexer>
class Parser {
public:
Parser(Lexer& lexer)
: m_lexer(lexer)
, m_current(lexer.lex())
{
}
Expected<AST::ShaderModule, Error> parseShader();
// UniqueRef whenever it can return multiple types.
Expected<UniqueRef<AST::GlobalDecl>, Error> parseGlobalDecl();
Expected<AST::Attributes, Error> parseAttributes();
Expected<UniqueRef<AST::Attribute>, Error> parseAttribute();
Expected<AST::StructDecl, Error> parseStructDecl(AST::Attributes&&);
Expected<AST::StructMember, Error> parseStructMember();
Expected<UniqueRef<AST::TypeDecl>, Error> parseTypeDecl();
Expected<UniqueRef<AST::TypeDecl>, Error> parseTypeDeclAfterIdentifier(StringView&&, SourcePosition start);
Expected<AST::GlobalVariableDecl, Error> parseGlobalVariableDecl(AST::Attributes&&);
Expected<AST::VariableQualifier, Error> parseVariableQualifier();
Expected<AST::StorageClass, Error> parseStorageClass();
Expected<AST::AccessMode, Error> parseAccessMode();
Expected<AST::FunctionDecl, Error> parseFunctionDecl(AST::Attributes&&);
Expected<AST::Parameter, Error> parseParameter();
Expected<UniqueRef<AST::Statement>, Error> parseStatement();
Expected<AST::CompoundStatement, Error> parseCompoundStatement();
Expected<AST::ReturnStatement, Error> parseReturnStatement();
Expected<UniqueRef<AST::Expression>, Error> parseShortCircuitOrExpression();
Expected<UniqueRef<AST::Expression>, Error> parseRelationalExpression();
Expected<UniqueRef<AST::Expression>, Error> parseShiftExpression();
Expected<UniqueRef<AST::Expression>, Error> parseAdditiveExpression();
Expected<UniqueRef<AST::Expression>, Error> parseMultiplicativeExpression();
Expected<UniqueRef<AST::Expression>, Error> parseUnaryExpression();
Expected<UniqueRef<AST::Expression>, Error> parseSingularExpression();
Expected<UniqueRef<AST::Expression>, Error> parsePostfixExpression(UniqueRef<AST::Expression>&& base, SourcePosition startPosition);
Expected<UniqueRef<AST::Expression>, Error> parsePrimaryExpression();
Expected<UniqueRef<AST::Expression>, Error> parseExpression();
Expected<UniqueRef<AST::Expression>, Error> parseLHSExpression();
Expected<UniqueRef<AST::Expression>, Error> parseCoreLHSExpression();
Expected<Vector<UniqueRef<AST::Expression>>, Error> parseArgumentExpressionList();
private:
Expected<Token, TokenType> consumeType(TokenType);
void consume();
Token& current() { return m_current; }
Lexer& m_lexer;
Token m_current;
};
} // namespace WGSL
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