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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 */