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Issue 11783009: Big merge from experimental to bleeding edge. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 7 years, 11 months ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 library Peg Parser; 5 library Peg Parser;
6 6
7 /* 7 /*
8 * The following functions are combinators for building Rules. 8 * The following functions are combinators for building Rules.
9 * 9 *
10 * A rule is one of the following 10 * A rule is one of the following
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62 62
63 // Find the range of character codes and construct an array of flags for codes 63 // Find the range of character codes and construct an array of flags for codes
64 // within the range. 64 // within the range.
65 List<int> codes = characters.charCodes; 65 List<int> codes = characters.charCodes;
66 codes.sort((a, b) => a < b ? -1 : a > b ? 1 : 0); 66 codes.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
67 int lo = codes[0]; 67 int lo = codes[0];
68 int hi = codes[codes.length - 1]; 68 int hi = codes[codes.length - 1];
69 if (lo == hi) 69 if (lo == hi)
70 return CHARCODE(lo); 70 return CHARCODE(lo);
71 int len = hi - lo + 1; 71 int len = hi - lo + 1;
72 var flags = new List<bool>(len); 72 var flags = new List<bool>.fixedLength(len);
73 for (int i = 0; i < len; ++i) 73 for (int i = 0; i < len; ++i)
74 flags[i] = false; 74 flags[i] = false;
75 for (int code in codes) 75 for (int code in codes)
76 flags[code - lo] = true; 76 flags[code - lo] = true;
77 77
78 return CHARCODE((code) => code >= lo && code <= hi && flags[code - lo]); 78 return CHARCODE((code) => code >= lo && code <= hi && flags[code - lo]);
79 } 79 }
80 80
81 /** 81 /**
82 * Matches the end of the input. 82 * Matches the end of the input.
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849 add(s); 849 add(s);
850 add(t); 850 add(t);
851 add(u); 851 add(u);
852 add(v); 852 add(v);
853 add(w); 853 add(w);
854 add(x); 854 add(x);
855 add(y); 855 add(y);
856 add(z); 856 add(z);
857 return list; 857 return list;
858 } 858 }
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