RegExpMatch 类 抽象 接口

正则表达式匹配。

正则表达式匹配是 Match 对象。它们还包括检索任何命名捕获组的名称以及通过名称而不是通过索引检索命名捕获组的能力。

示例

const pattern =
    r'^\[(?<Time>\s*((?<hour>\d+)):((?<minute>\d+))\.((?<second>\d+)))\]'
    r'\s(?<Message>\s*(.*)$)';

final regExp = RegExp(
  pattern,
  multiLine: true,
);

const multilineText = '[00:13.37] This is a first message.\n'
    '[01:15.57] This is a second message.\n';

RegExpMatch regExpMatch = regExp.firstMatch(multilineText)!;
print(regExpMatch.groupNames.join('-')); // hour-minute-second-Time-Message.
final time = regExpMatch.namedGroup('Time'); // 00:13.37
final hour = regExpMatch.namedGroup('hour'); // 00
final minute = regExpMatch.namedGroup('minute'); // 13
final second = regExpMatch.namedGroup('second'); // 37
final message =
    regExpMatch.namedGroup('Message'); // This is the first message.
final date = regExpMatch.namedGroup('Date'); // Undefined `Date`, throws.

Iterable<RegExpMatch> matches = regExp.allMatches(multilineText);
for (final m in matches) {
  print(m.namedGroup('Time'));
  print(m.namedGroup('Message'));
  // 00:13.37
  // This is the first message.
  // 01:15.57
  // This is the second message.
}