SyntaxError: unterminated parenthetical

[jehna]

From using:

VerEx().startOfLine().then("aaa").or("bbb").endOfLine()

I'd expect it to compile to something like:

/^(aaa|bbb)$/

...but since endOfLine discards existing suffixes (where there is a capture group close parenthesis from .or), it leaves the capture group open, resulting in:

/^(aaa|bbb$/

[joseignaciorm]

The same error here: SyntaxError: Invalid regular expression: /^(?:(?:aaa))|(?:(?:bbb)$/: Unterminated group

The .or() function generates the capture group's open parenthesis in _prefixes: '^(?:', the corresponding capture group's close parenthesis in source: _source: '(?:aaa))' before the .or() function, but the capture group's close parenthesis of the .or function is generated by the suffixes variable => _suffixes: ')$'. So then, the problem is when we use endOfLine, it generates an empty prefixes _prefixes: '' and the suffixes _suffixes: '$' which deletes the previous suffixes which includes the capture group's close parenthesis generated by the .or function.

My solution for now was the following below:
In the endOfLine function I've added the addition assignment operator += to the _suffixes variable instead of the assignment operator = so that we add instead of rewrite the _suffixes variable. example:

Before adding addition assignment operator to the _suffixes variable:

{
    key: "endOfLine",
    value: function endOfLine() {
      var enable = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : true;
      this._suffixes = enable ? '$' : '';
      return this.add(); 
}

After adding addition assignment operator to the _suffixes variable:

{
    key: "endOfLine",
    value: function endOfLine() {
      var enable = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : true;
      this._suffixes += enable ? '$' : '';
      return this.add(); 
}

Also you can test it out with this examples to see the three different outputs:

const VerEx = require('../dist/verbalexpressions.js');

// or and endOfLine
const expr1 = VerEx().startOfLine().then("aaa").or("bbb").endOfLine()
console.log(expr1); 

// endOfLine
const expr2 = VerEx().find('aaa').endOfLine();
console.log(expr2); 

// or
const expr3 = VerEx().find('aaa').or('bbb');
console.log(expr3); 

I hope this can help.