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      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 
     33 package org.antlr.codegen;
     34 
     35 import org.antlr.Tool;
     36 import org.antlr.tool.Grammar;
     37 import org.stringtemplate.v4.AttributeRenderer;
     38 import org.stringtemplate.v4.ST;
     39 
     40 import java.io.IOException;
     41 import java.util.HashMap;
     42 import java.util.HashSet;
     43 import java.util.Locale;
     44 import java.util.Map;
     45 
     46 public 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