LemonJS/example/parser.y

%name Parser

%token_prefix TOKEN_

%left OR.
%left AND.
%right NOT.

%include {
    // include something
}

%code {
    &&REPLACER{test_code_environment.js}&&

    var _result = {
        error: false
    };
    var LemonJS = function(_input) {
        _result = Object.create(null);
        var parser = new Parser();
        var lexer = new Lexer(_input);
        var token;
        var lexemes = [];
        while (token = lexer.next()) {
            if(_result.error) {
                return { success: false }
            }

            if (token.error === 0) {
                console.log("PARSE", token.lexeme);
                parser.parse(parser["TOKEN_" + token.lexeme], token);
                lexemes.push(token);
            }
        }
        parser.parse();

        return {
            success: true,
            tree: _result.root_node,
            lexemes: lexemes
        };
    };
}

%syntax_error {
    _result.error = "true";
    console.log("Syntax error");
}

&&REPLACER{rules.y}&&