dart:core

RegExpMatch class

A regular expression match.

Regular expression matches are Matches, but also include the ability to retrieve the names for any named capture groups and to retrieve matches for named capture groups by name instead of their index.

Example:

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 a 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 a first message.
  // 01:15.57
  // This is a second message.
}

Implemented types

• Match

Annotations

• @Since("2.3")

Constructors

RegExpMatch()

Properties

end → int

read-only, inherited

The index in the string after the last character of the match.

groupCount → int

read-only, inherited

Returns the number of captured groups in the match.

groupNames → Iterable<String>

read-only

The names of the captured groups in the match.

hashCode → int

read-only, inherited

The hash code for this object.

input → String

read-only, inherited

The string on which this match was computed.

pattern → Pattern

read-only, inherited

The pattern used to search in input.

runtimeType → Type

read-only, inherited

A representation of the runtime type of the object.

start → int

read-only, inherited

The index in the string where the match starts.

Methods

group(int group) → String?

inherited

The string matched by the given group.

groups(List<int> groupIndices) → List<String?>

inherited

A list of the groups with the given indices.

namedGroup(String name) → String?

The string matched by the group named name.

noSuchMethod(Invocation invocation) → dynamic

inherited

Invoked when a non-existent method or property is accessed.

toString() → String

inherited

A string representation of this object.

Operators

operator ==(Object other) → bool

inherited

The equality operator.

operator [](int group) → String?

inherited

The string matched by the given group.