Jurassic.Compiler.Lexer.ReadNumericLiteral C# (CSharp) Метод

        private Token ReadNumericLiteral(int firstChar)
        {
            // We need to keep track of the column and possibly capture the input into a string.
            var reader = new LexerReader(this);

            NumberParser.ParseCoreStatus status;
            double result = NumberParser.ParseCore(reader, (char)firstChar, out status);

            // Handle various error cases.
            switch (status)
            {
                case NumberParser.ParseCoreStatus.NoDigits:
                    // If the number consists solely of a period, return that as a token.
                    return PunctuatorToken.Dot;
                case NumberParser.ParseCoreStatus.NoExponent:
                    throw new JavaScriptException(this.engine, ErrorType.SyntaxError, "Invalid number.", this.lineNumber, this.Source.Path);
                case NumberParser.ParseCoreStatus.InvalidHexLiteral:
                    throw new JavaScriptException(this.engine, ErrorType.SyntaxError, "Invalid hexidecimal literal.", this.lineNumber, this.Source.Path);
                case NumberParser.ParseCoreStatus.ES3OctalLiteral:
                    // ES3 octal literals are not supported in strict mode.
                    if (this.StrictMode)
                        throw new JavaScriptException(this.engine, ErrorType.SyntaxError, "Octal numbers are not allowed in strict mode.", this.lineNumber, this.Source.Path);
                    break;
                case NumberParser.ParseCoreStatus.InvalidOctalLiteral:
                    throw new JavaScriptException(this.engine, ErrorType.SyntaxError, "Invalid octal literal.", this.lineNumber, this.Source.Path);
                case NumberParser.ParseCoreStatus.InvalidBinaryLiteral:
                    throw new JavaScriptException(this.engine, ErrorType.SyntaxError, "Invalid binary literal.", this.lineNumber, this.Source.Path);
            }

            // Return the result as an integer if possible, otherwise return it as a double.
            if (result == (double)(int)result)
                return new LiteralToken((int)result);
            return new LiteralToken(result);
        }