Posted By:
Anonymous
Posted On:
Saturday, March 12, 2005 12:03 PM
Hi everyone! I'm trying to use Antlr for the first time. I've generated parsers and lexers (java) but now I'm unable to use them. I've written a very simple grammar for test purpose but I do not have any results, since I've got errors when I use it. So here is the code of my grammar: class ProcessusParser extends Parser; options { buildAST = true; k = 3; } spec : (ID ";")+ EOF! ; class ProcessusLexer extends Lexer; options { k = 3; } ID options {testLiterals=true;} :
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Hi everyone!
I'm trying to use Antlr for the first time. I've generated parsers and lexers (java) but now I'm unable to use them.
I've written a very simple grammar for test purpose but I do not have any results, since I've got errors when I use it. So here is the code of my grammar:
class ProcessusParser extends Parser;
options {
buildAST = true;
k = 3;
}
spec
: (ID ";")+ EOF!
;
class ProcessusLexer extends Lexer;
options {
k = 3;
}
ID
options {testLiterals=true;}
: ('a'..'z'|'A'..'Z')
('a'..'z'|'A'..'Z'|'_'|'0'..'9')*
;
And now the code of my main class :
class Processus {
public static void main(String[] args)
throws IOException {
FileInputStream processusFichier = new FileInputStream(args[0]);
ProcessusLexer lexerent = new ProcessusLexer(processusFichier);
ProcessusParser parserent = new ProcessusParser(lexerent);
try {
parserent.spec();
}
catch(RecognitionException e) {
System.err.println("exception: "+e);
}
catch (TokenStreamException e) {
System.err.println("exception: "+e);
}
}
}
When I launch the main with the following input :
var1;
var2;
var3;
var4;
var5;
I've got the following message: "exception: line 1:5: unexpected char: ';'"
If I put spaces, like for exemple : "var1 ;", the unexpected char becomes " " (space char).
I really do not understand, I believe it is very simple but I don't see the problem. Thanks for your help
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