private PythonParser setupParser(boolean single) {
PythonLexer lexer = new PyLexer(charStream, single);
lexer.setErrorHandler(errorHandler);
CommonTokenStream tokens = new CommonTokenStream(lexer);
PythonTokenSource indentedSource = new PythonTokenSource(tokens, filename, single);
tokens = new CommonTokenStream(indentedSource);
PythonParser parser = new PythonParser(tokens, encoding);
parser.setErrorHandler(errorHandler);
parser.setTreeAdaptor(new PythonTreeAdaptor());
return parser;
}
public mod parseExpression() {
mod tree = null;
PythonParser parser = setupParser(false);
try {
PythonParser.eval_input_return r = parser.eval_input();
tree = (mod) r.tree;
} catch (RecognitionException e) {
// XXX: this can't happen. Need to strip the throws from antlr
// generated code.
}
return tree;
}
public mod parseInteractive() {
mod tree = null;
PythonParser parser = setupParser(true);
try {
PythonParser.single_input_return r = parser.single_input();
tree = (mod) r.tree;
} catch (RecognitionException e) {
// I am only throwing ParseExceptions, but "throws RecognitionException" still gets
// into the generated code.
System.err.println("FIXME: pretty sure this can't happen -- but needs to be checked");
}
return tree;
}
