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using System;
using antlr.collections;
using antlr.collections.impl;
using antlr;
class MultiLexer {
// Define a selector that can switch from java to javadoc; make visible to lexers
public static TokenStreamSelector selector = new TokenStreamSelector();
public static void Main(String[] args) {
try {
// open a simple stream to the input
ByteBuffer input = new ByteBuffer(Console.OpenStandardInput());
// attach java lexer to the input stream, which also creates a shared input state object
DemoJavaLexer main = new DemoJavaLexer(input);
// create javadoc lexer; attach to same shared input state as java lexer
DemoJavaDocLexer doclexer = new DemoJavaDocLexer(main.getInputState());
// notify selector about various lexers; name them for convenient reference later
selector.addInputStream(main, "main");
selector.addInputStream(doclexer, "doclexer");
selector.select("main"); // start with main java lexer
// Create parser attached to selector
DemoJavaParser parser = new DemoJavaParser(selector);
// Pull in one or more int decls with optional javadoc
parser.input();
/*
// spin thru all tokens generated via the SELECTOR.
Token t;
while ( (t=selector.nextToken()).Type!=main.EOF ) {
Console.Out.WriteLine(t.ToString());
}
*/
}
catch(Exception e) {
Console.Error.WriteLine("exception: "+e);
Console.Error.WriteLine(e.StackTrace); // so we can get stack trace
}
}
}
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