Parser.java 文件源码

public Expr parse(String text) {
    diagnostics.clear();
    try (Reader reader = new StringReader(text)) {
        ExprLexer lexer = new ExprLexer(new ANTLRInputStream(reader));
        lexer.removeErrorListener(ConsoleErrorListener.INSTANCE);
        lexer.addErrorListener(errorListener);
        ExprParser exprParser = new ExprParser(new CommonTokenStream(lexer));
        exprParser.removeErrorListener(ConsoleErrorListener.INSTANCE);
        exprParser.addErrorListener(errorListener);
        return exprParser.lambda().accept(exprVisitor);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}