CSharp3Target.java revision 324c4644fee44b9898524c09511bd33c3f12e2df 
1/*
2 * [The "BSD license"]
3 * Copyright (c) 2005-2008 Terence Parr
4 * All rights reserved.
5 *
6 * Conversion to C#:
7 * Copyright (c) 2008-2010 Sam Harwell, Pixel Mine, Inc.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package org.antlr.codegen;
34
35import org.antlr.Tool;
36import org.antlr.tool.Grammar;
37import org.stringtemplate.v4.AttributeRenderer;
38import org.stringtemplate.v4.ST;
39
40import java.io.IOException;
41import java.util.HashMap;
42import java.util.HashSet;
43import java.util.Locale;
44import java.util.Map;
45
46public class CSharp3Target extends Target {
47    private static final HashSet<String> _languageKeywords = new HashSet<String>()
48        {{
49            add("abstract"); add("event"); add("new"); add("struct");
50            add("as"); add("explicit"); add("null"); add("switch");
51            add("base"); add("extern"); add("object"); add("this");
52            add("bool"); add("false"); add("operator"); add("throw");
53            add("break"); add("finally"); add("out"); add("true");
54            add("byte"); add("fixed"); add("override"); add("try");
55            add("case"); add("float"); add("params"); add("typeof");
56            add("catch"); add("for"); add("private"); add("uint");
57            add("char"); add("foreach"); add("protected"); add("ulong");
58            add("checked"); add("goto"); add("public"); add("unchecked");
59            add("class"); add("if"); add("readonly"); add("unsafe");
60            add("const"); add("implicit"); add("ref"); add("ushort");
61            add("continue"); add("in"); add("return"); add("using");
62            add("decimal"); add("int"); add("sbyte"); add("virtual");
63            add("default"); add("interface"); add("sealed"); add("volatile");
64            add("delegate"); add("internal"); add("short"); add("void");
65            add("do"); add("is"); add("sizeof"); add("while");
66            add("double"); add("lock"); add("stackalloc");
67            add("else"); add("long"); add("static");
68            add("enum"); add("namespace"); add("string");
69        }};
70
71    @Override
72    public String encodeIntAsCharEscape(int v) {
73        return "\\x" + Integer.toHexString(v).toUpperCase();
74    }
75
76    @Override
77    public String getTarget64BitStringFromValue(long word) {
78        return "0x" + Long.toHexString(word).toUpperCase();
79    }
80
81    @Override
82    protected void genRecognizerFile(Tool tool, CodeGenerator generator, Grammar grammar, ST outputFileST) throws IOException
83    {
84        if (!grammar.getGrammarIsRoot())
85        {
86            Grammar rootGrammar = grammar.composite.getRootGrammar();
87            String actionScope = grammar.getDefaultActionScope(grammar.type);
88            Map<String, Object> actions = rootGrammar.getActions().get(actionScope);
89            Object rootNamespace = actions != null ? actions.get("namespace") : null;
90            if (actions != null && rootNamespace != null)
91            {
92                actions = grammar.getActions().get(actionScope);
93                if (actions == null)
94                {
95                    actions = new HashMap<String, Object>();
96                    grammar.getActions().put(actionScope, actions);
97                }
98
99                actions.put("namespace", rootNamespace);
100            }
101        }
102
103        generator.getTemplates().registerRenderer(String.class, new StringRenderer(generator, this));
104        super.genRecognizerFile(tool, generator, grammar, outputFileST);
105    }
106
107    public static class StringRenderer implements AttributeRenderer
108    {
109        private final CodeGenerator _generator;
110        private final CSharp3Target _target;
111
112        public StringRenderer(CodeGenerator generator, CSharp3Target target)
113        {
114            _generator = generator;
115            _target = target;
116        }
117
118        public String toString(Object obj, String formatName, Locale locale)
119        {
120            String value = (String)obj;
121            if (value == null || formatName == null)
122                return value;
123
124            if (formatName.equals("id")) {
125                if (_languageKeywords.contains(value))
126                    return "@" + value;
127
128                return value;
129            } else if (formatName.equals("cap")) {
130                return Character.toUpperCase(value.charAt(0)) + value.substring(1);
131            } else if (formatName.equals("string")) {
132                return _target.getTargetStringLiteralFromString(value, true);
133            } else {
134                throw new IllegalArgumentException("Unsupported format name: '" + formatName + "'");
135            }
136        }
137    }
138}
139
140