function scanNumber()

in src/impl/scanner.ts [60:99]

• 40 lines of code
• 20 McCabe index (conditional complexity)

	function scanNumber(): string {
		let start = pos;
		if (text.charCodeAt(pos) === CharacterCodes._0) {
			pos++;
		} else {
			pos++;
			while (pos < text.length && isDigit(text.charCodeAt(pos))) {
				pos++;
			}
		}
		if (pos < text.length && text.charCodeAt(pos) === CharacterCodes.dot) {
			pos++;
			if (pos < text.length && isDigit(text.charCodeAt(pos))) {
				pos++;
				while (pos < text.length && isDigit(text.charCodeAt(pos))) {
					pos++;
				}
			} else {
				scanError = ScanError.UnexpectedEndOfNumber;
				return text.substring(start, pos);
			}
		}
		let end = pos;
		if (pos < text.length && (text.charCodeAt(pos) === CharacterCodes.E || text.charCodeAt(pos) === CharacterCodes.e)) {
			pos++;
			if (pos < text.length && text.charCodeAt(pos) === CharacterCodes.plus || text.charCodeAt(pos) === CharacterCodes.minus) {
				pos++;
			}
			if (pos < text.length && isDigit(text.charCodeAt(pos))) {
				pos++;
				while (pos < text.length && isDigit(text.charCodeAt(pos))) {
					pos++;
				}
				end = pos;
			} else {
				scanError = ScanError.UnexpectedEndOfNumber;
			}
		}
		return text.substring(start, end);
	}