Clone this repo:
  1. 2d84b16 Remove deprecated experimental invariant_booleans lint rule (#47) by Sam Rawlins · 9 weeks ago master
  2. c637deb Add better support for dealing with supplemental-plane code units (#46) by Natalie Weizenbaum · 4 months ago
  3. 1259807 rev to 1.1.1 in preparation for publishing (#45) by Devon Carew · 5 months ago 1.1.1
  4. 6579871 populate the pubspec repository field (#44) by Devon Carew · 5 months ago
  5. 9837ac8 Bump actions/checkout from 2 to 3 (#42) by dependabot[bot] · 7 months ago

Dart CI pub package package publisher

This package exposes a StringScanner type that makes it easy to parse a string using a series of Patterns. For example:

import 'dart:math' as math;

import 'package:string_scanner/string_scanner.dart';

num parseNumber(String source) {
  // Scan a number ("1", "1.5", "-3").
  final scanner = StringScanner(source);

  // [Scanner.scan] tries to consume a [Pattern] and returns whether or not it
  // succeeded. It will move the scan pointer past the end of the pattern.
  final negative = scanner.scan('-');

  // [Scanner.expect] consumes a [Pattern] and throws a [FormatError] if it
  // fails. Like [Scanner.scan], it will move the scan pointer forward.
  scanner.expect(RegExp(r'\d+'));

  // [Scanner.lastMatch] holds the [MatchData] for the most recent call to
  // [Scanner.scan], [Scanner.expect], or [Scanner.matches].
  var number = num.parse(scanner.lastMatch[0]);

  if (scanner.scan('.')) {
    scanner.expect(RegExp(r'\d+'));
    final decimal = scanner.lastMatch[0];
    number += int.parse(decimal) / math.pow(10, decimal.length);
  }

  // [Scanner.expectDone] will throw a [FormatError] if there's any input that
  // hasn't yet been consumed.
  scanner.expectDone();

  return (negative ? -1 : 1) * number;
}