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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* A variant-like class abstracting operations on a Parser with a given
* ParseHandler but unspecified character type.
*/
#ifndef frontend_EitherParser_h
#define frontend_EitherParser_h
#include "mozilla/Utf8.h"
#include "mozilla/Variant.h"
#include <type_traits>
#include <utility>
#include "frontend/Parser.h"
#include "js/ColumnNumber.h" // JS::LimitedColumnNumberOneOrigin
namespace js::frontend {
class EitherParser final {
// Leave this as a variant, to promote good form until 8-bit parser
// integration.
mozilla::Variant<Parser<FullParseHandler, char16_t>* const,
Parser<FullParseHandler, mozilla::Utf8Unit>* const>
parser;
public:
template <class Parser>
explicit EitherParser(Parser* parser) : parser(parser) {}
const ErrorReporter& errorReporter() const {
return parser.match([](auto* parser) -> const frontend::ErrorReporter& {
return parser->tokenStream;
});
}
void computeLineAndColumn(uint32_t offset, uint32_t* line,
JS::LimitedColumnNumberOneOrigin* column) const {
return parser.match([offset, line, column](auto* parser) -> void {
parser->tokenStream.computeLineAndColumn(offset, line, column);
});
}
ParserAtomsTable& parserAtoms() {
auto& base = parser.match(
[](auto* parser) -> frontend::ParserSharedBase& { return *parser; });
return base.parserAtoms();
}
};
} /* namespace js::frontend */
#endif /* frontend_EitherParser_h */
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