src/main/java/com/acme/calculator/main/Calculator.java
/**
     * The lexer reads characters and converts them into a token stream.
     * The tokens are consumed by the parser as it builds an AST.
     *
     * @param lexer
     * @return BasicCalculatorParser created
     */
The lexer reads characters and converts them into a token stream.
The tokens are consumed by the parser as it builds an AST.

@param lexer
@return BasicCalculatorParser created
The lexer reads characters and converts them into a token stream . The tokens are consumed by the parser as it builds an AST . @param lexer @return BasicCalculatorParser created
private BasicCalculatorParser createParser(final BasicCalculatorLexer lexer) {
        logger.debug("createParser()");
        final CommonTokenStream tokens = new CommonTokenStream(lexer);
        final BasicCalculatorParser parser = new BasicCalculatorParser(tokens);
        parser.removeErrorListeners();
        parser.addErrorListener(errorListener);
        return parser;
    }
private BasicCalculatorParser createParser ( final BasicCalculatorLexer lexer ) { logger . debug ( "createParser()" ) ; final CommonTokenStream tokens = new CommonTokenStream ( lexer ) ; final BasicCalculatorParser parser = new BasicCalculatorParser ( tokens ) ; parser . removeErrorListeners ( ) ; parser . addErrorListener ( errorListener ) ; return parser ; }
The lexer reads characters and converts them into a token stream.
The lexer reads characters and converts them into a token stream .
// Replace default Antlr4 error listener (which prints errors to stderr).