Jurassic.Compiler.Lexer.ReadDivideCommentOrRegularExpression C# (CSharp) Method

        private Token ReadDivideCommentOrRegularExpression()
        {
            // Comment or divide or regular expression.
            int c2 = this.reader.Peek();
            if (c2 == '*')
            {
                // Multi-line comment.

                // Skip the asterisk.
                ReadNextChar();

                return ReadMultiLineComment();
            }
            else if (c2 == '/')
            {
                // Single-line comment.

                // Skip the slash.
                ReadNextChar();

                return ReadSingleLineComment();
            }
            else
            {
                // Divide or regular expression.

                // Determine from the context whether the token is a regular expression
                // or a division operator.
                bool isDivisionOperator;
                switch (this.ParserExpressionState)
                {
                    case ParserExpressionState.Literal:
                        isDivisionOperator = false;
                        break;
                    case ParserExpressionState.Operator:
                        isDivisionOperator = true;
                        break;
                    default:
                        // If the parser context is unknown, the token before the slash is
                        // what determines whether the token is a divide operator or a
                        // regular expression literal.
                        isDivisionOperator =
                            this.lastSignificantToken is IdentifierToken ||
                            this.lastSignificantToken is LiteralToken ||
                            this.lastSignificantToken == PunctuatorToken.RightParenthesis ||
                            this.lastSignificantToken == PunctuatorToken.Increment ||
                            this.lastSignificantToken == PunctuatorToken.Decrement ||
                            this.lastSignificantToken == PunctuatorToken.RightBracket ||
                            this.lastSignificantToken == PunctuatorToken.RightBrace;
                        break;
                }

                if (isDivisionOperator)
                {
                    // Two division operators: "/" and "/=".
                    if (c2 == '=')
                    {
                        ReadNextChar();
                        return PunctuatorToken.CompoundDivide;
                    }
                    else
                        return PunctuatorToken.Divide;
                }
                else
                {
                    // Regular expression.
                    return ReadRegularExpression();
                }
            }
        }