Move frog/leg to lib/compiler/implementation.

frog/leg/lib/string_helper.dart

-// Copyright (c) 2012, 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.
-
-class StringMatch implements Match {
-  const StringMatch(int this._start,
-                    String this.str,
-                    String this.pattern);
-
-  int start() => _start;
-  int end() => _start + pattern.length;
-  String operator[](int g) => group(g);
-  int groupCount() => 0;
-
-  String group(int group_) {
-    if (group_ != 0) {
-      throw new IndexOutOfRangeException(group_);
-    }
-    return pattern;
-  }
-
-  List<String> groups(List<int> groups_) {
-    List<String> result = new List<String>();
-    for (int g in groups_) {
-      result.add(group(g));
-    }
-    return result;
-  }
-
-  final int _start;
-  final String str;
-  final String pattern;
-}
-
-List<Match> allMatchesInStringUnchecked(String needle, String haystack) {
-  // Copied from StringBase.allMatches in
-  // ../../../runtime/lib/string.dart
-  List<Match> result = new List<Match>();
-  int length = haystack.length;
-  int patternLength = needle.length;
-  int startIndex = 0;
-  while (true) {
-    int position = haystack.indexOf(needle, startIndex);
-    if (position == -1) {
-      break;
-    }
-    result.add(new StringMatch(position, haystack, needle));
-    int endIndex = position + patternLength;
-    if (endIndex == length) {
-      break;
-    } else if (position == endIndex) {
-      ++startIndex;  // empty match, advance and restart
-    } else {
-      startIndex = endIndex;
-    }
-  }
-  return result;
-}
-
-stringContainsUnchecked(receiver, other, startIndex) {
-  if (other is String) {
-    return receiver.indexOf(other, startIndex) !== -1;
-  } else if (other is JSSyntaxRegExp) {
-    return other.hasMatch(receiver.substring(startIndex));
-  } else {
-    var substr = receiver.substring(startIndex);
-    return other.allMatches(substr).iterator().hasNext();
-  }
-}
-
-stringReplaceAllUnchecked(receiver, from, to) {
-  if (from is String) {
-    if (from == "") {
-      if (receiver == "") {
-        return to;
-      } else {
-        StringBuffer result = new StringBuffer();
-        int length = receiver.length;
-        result.add(to);
-        for (int i = 0; i < length; i++) {
-          result.add(receiver[i]);
-          result.add(to);
-        }
-        return result.toString();
-      }
-    } else {
-      RegExp quoteRegExp =
-          const JSSyntaxRegExp(@'[-[\]{}()*+?.,\\^$|#\s]', false, false);
-      var quoter = regExpMakeNative(quoteRegExp, global: true);
-      var quoted = JS('String', @'#.replace(#, "\\$&")', from, quoter);
-      RegExp replaceRegExp = new JSSyntaxRegExp(quoted, false, false);
-      var replacer = regExpMakeNative(replaceRegExp, global: true);    
-      return JS('String', @'#.replace(#, #)', receiver, replacer, to);
-    }
-  } else if (from is JSSyntaxRegExp) {
-    var re = regExpMakeNative(from, global: true);
-    return JS('String', @'#.replace(#, #)', receiver, re, to);
-  } else {
-    checkNull(from);
-    // TODO(floitsch): implement generic String.replace (with patterns).
-    throw "StringImplementation.replaceAll(Pattern) UNIMPLEMENTED";
-  }
-}
-
-stringReplaceFirstUnchecked(receiver, from, to) {
-  if (from is String) {
-    return JS('String', @'#.replace(#, #)', receiver, from, to);
-  } else if (from is JSSyntaxRegExp) {
-    var re = regExpGetNative(from);
-    return JS('String', @'#.replace(#, #)', receiver, re, to);
-  } else {
-    checkNull(from);
-    // TODO(floitsch): implement generic String.replace (with patterns).
-    throw "StringImplementation.replace(Pattern) UNIMPLEMENTED";
-  }
-}
-
-stringSplitUnchecked(receiver, pattern) {
-  if (pattern is String) {
-    return JS('List', @'#.split(#)', receiver, pattern);
-  } else if (pattern is JSSyntaxRegExp) {
-    var re = regExpGetNative(pattern);
-    return JS('List', @'#.split(#)', receiver, re);
-  } else {
-    throw "StringImplementation.split(Pattern) UNIMPLEMENTED";
-  }
-}