1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
#include <iostream>
#include "Main.hpp"
#include "PLexer.hpp"
#include "PParser.hpp"
ANTLR_USING_NAMESPACE(std)
ANTLR_USING_NAMESPACE(antlr)
// Define a selector that can handle nested include files.
// These variables are public so the parser/lexer can see them.
TokenStreamSelector selector;
PParser* parser;
PLexer* mainLexer;
int main( int, char** )
{
try {
// attach java lexer to the input stream,
mainLexer = new PLexer(cin);
// notify selector about starting lexer; name for convenience
selector.addInputStream(mainLexer, "main");
selector.select("main"); // start with main P lexer
// Create parser attached to selector
parser = new PParser(selector);
// Parse the input language: P
parser->setFilename("<stdin>");
parser->startRule();
}
catch( ANTLRException& e )
{
cerr << "exception: " << e.getMessage() << endl;
return -1;
}
catch( exception& e )
{
cerr << "exception: " << e.what() << endl;
return -1;
}
return 0;
}
|
