pkg/matcher: cleanup, updates, deprecations, fixes

pkg/matcher/lib/src/utils.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library matcher.utils;
-
-/**
- * Returns the name of the type of [x], or "Unknown" if the type name can't be
- * determined.
- */
-String typeName(x) {
-  // dart2js blows up on some objects (e.g. window.navigator).
-  // So we play safe here.
-  try {
-    if (x == null) return "null";
-    var type = x.runtimeType.toString();
-    // TODO(nweiz): if the object's type is private, find a public superclass to
-    // display once there's a portable API to do that.
-    return type.startsWith("_") ? "?" : type;
-  } catch (e) {
-    return "?";
-  }
-}
-
-/**
- * Returns [source] with any control characters replaced by their escape
- * sequences.
- *
- * This doesn't add quotes to the string, but it does escape single quote
- * characters so that single quotes can be applied externally.
- */
-String escapeString(String source) =>
-    source.split("").map(_escapeChar).join("");
-
-/** Return the escaped form of a character [ch]. */
-String _escapeChar(String ch) {
-  if (ch == "'")
-    return "\\'";
-  else if (ch == '\n')
-    return '\\n';
-  else if (ch == '\r')
-    return '\\r';
-  else if (ch == '\t')
-    return '\\t';
-  else
-    return ch;
-}
-
-/** Indent each line in [str] by two spaces. */
-String indent(String str) =>
-  str.replaceAll(new RegExp("^", multiLine: true), "  ");
-
-/** A pair of values. */
-class Pair<E, F> {
-  E first;
-  F last;
-
-  Pair(this.first, this.last);
-
-  String toString() => '($first, $last)';
-
-  bool operator ==(other) {
-    if (other is! Pair) return false;
-    return other.first == first && other.last == last;
-  }
-
-  int get hashCode => first.hashCode ^ last.hashCode;
-}
-