InputStream exprStream = new ByteArrayInputStream(exprStr.getBytes());
CharStream input = new ANTLRInputStream(exprStream);
ExprGrammarLexer lexer = new ExprGrammarLexer(input);
InputStream exprStream = new ByteArrayInputStream(exprStr.getBytes());
CharStream input = new ANTLRInputStream(exprStream);
ExprGrammarLexer lexer = new ExprGrammarLexer(input);