toString method

@override String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Implementation

@override
String toString() {
  var buffer = StringBuffer();

  final min = this.min;
  if (min != null) {
    buffer
      ..write(includeMin ? '>=' : '>')
      ..write(min);
  }

  final max = this.max;

  if (max != null) {
    if (min != null) buffer.write(' ');
    if (includeMax) {
      buffer
        ..write('<=')
        ..write(max);
    } else {
      buffer.write('<');
      if (max.isFirstPreRelease) {
        // Since `"<$max"` would parse the same as `"<$max-0"`, we just emit
        // `<$max` to avoid confusing "-0" suffixes.
        buffer.write('${max.major}.${max.minor}.${max.patch}');
      } else {
        buffer.write(max);

        // If `">=$min <$max"` would parse as `">=$min <$max-0"`, add `-*` to
        // indicate that actually does allow pre-release versions.
        var minIsPreReleaseOfMax = min != null &&
            min.isPreRelease &&
            equalsWithoutPreRelease(min, max);
        if (!max.isPreRelease && max.build.isEmpty && !minIsPreReleaseOfMax) {
          buffer.write('-∞');
        }
      }
    }
  }

  if (min == null && max == null) buffer.write('any');
  return buffer.toString();
}