langtools/src/jdk.jshell/share/classes/jdk/jshell/ReplParserFactory.java
author rfield
Mon, 06 Feb 2017 09:00:02 -0800
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permissions -rw-r--r--
8173848: JShell: less-than causes: reached end of file while parsing Reviewed-by: jlahoda
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/*
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 * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package jdk.jshell;
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import com.sun.tools.javac.parser.JavacParser;
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import com.sun.tools.javac.parser.ParserFactory;
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import com.sun.tools.javac.parser.ScannerFactory;
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import com.sun.tools.javac.util.Context;
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/**
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 *
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 * @author Robert Field
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 */
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class ReplParserFactory extends ParserFactory {
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    // force starting in expression mode
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    private final boolean forceExpression;
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    public static void preRegister(Context context, boolean forceExpression) {
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        context.put(parserFactoryKey, (Context.Factory<ParserFactory>)
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                (c -> new ReplParserFactory(c, forceExpression)));
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    }
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    private final ScannerFactory scannerFactory;
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    protected ReplParserFactory(Context context, boolean forceExpression) {
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        super(context);
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        this.forceExpression = forceExpression;
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        this.scannerFactory = ScannerFactory.instance(context);
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    }
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    @Override
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    public JavacParser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap) {
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        com.sun.tools.javac.parser.Lexer lexer = scannerFactory.newScanner(input, keepDocComments);
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        return new ReplParser(this, lexer, keepDocComments, keepLineMap, keepEndPos, forceExpression);
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    }
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    @Override
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    public JavacParser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap, boolean parseModuleInfo) {
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        return newParser(input, keepDocComments, keepEndPos, keepLineMap);
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    }
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}