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smoke/lib/src/common.dart

Index: smoke/lib/src/common.dart
diff --git a/smoke/lib/src/common.dart b/smoke/lib/src/common.dart
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-// Copyright (c) 2014, 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.
-
-/// Some common utilities used by other libraries in this package.
-library smoke.src.common;
-
-import 'package:smoke/smoke.dart' as smoke show isSubclassOf;
-
-/// Returns [input] adjusted to be within [min] and [max] length. Truncating it
-/// if it's longer, or padding it with nulls if it's shorter. The returned list
-/// is a new copy if any modification is needed, otherwise [input] is returned.
-List adjustList(List input, int min, int max) {
-  if (input.length < min) {
-    return new List(min)..setRange(0, input.length, input);
-  }
-
-  if (input.length > max) {
-    return new List(max)..setRange(0, max, input);
-  }
-  return input;
-}
-
-/// Returns whether [metadata] contains any annotation that is either equal to
-/// an annotation in [queryAnnotations] or whose type is listed in
-/// [queryAnnotations].
-bool matchesAnnotation(Iterable metadata, Iterable queryAnnotations) {
-  for (var meta in metadata) {
-    for (var queryMeta in queryAnnotations) {
-      if (meta == queryMeta) return true;
-      if (queryMeta is Type &&
-          smoke.isSubclassOf(meta.runtimeType, queryMeta)) return true;
-    }
-  }
-  return false;
-}
-
-/// Number of arguments supported by [minArgs] and [maxArgs].
-const SUPPORTED_ARGS = 15;
-
-typedef _Func0();
-typedef _Func1(a);
-typedef _Func2(a, b);
-typedef _Func3(a, b, c);
-typedef _Func4(a, b, c, d);
-typedef _Func5(a, b, c, d, e);
-typedef _Func6(a, b, c, d, e, f);
-typedef _Func7(a, b, c, d, e, f, g);
-typedef _Func8(a, b, c, d, e, f, g, h);
-typedef _Func9(a, b, c, d, e, f, g, h, i);
-typedef _Func10(a, b, c, d, e, f, g, h, i, j);
-typedef _Func11(a, b, c, d, e, f, g, h, i, j, k);
-typedef _Func12(a, b, c, d, e, f, g, h, i, j, k, l);
-typedef _Func13(a, b, c, d, e, f, g, h, i, j, k, l, m);
-typedef _Func14(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
-typedef _Func15(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
-
-/// Returns the minimum number of arguments that [f] takes as input, in other
-/// words, the total number of required arguments of [f]. If [f] expects more
-/// than [SUPPORTED_ARGS], this function returns `SUPPORTED_ARGS + 1`.
-///
-/// For instance, the current implementation only supports calculating the
-/// number of arguments between `0` and `3`. If the function takes `4` or more,
-/// this function automatically returns `4`.
-int minArgs(Function f) {
-  if (f is _Func0) return 0;
-  if (f is _Func1) return 1;
-  if (f is _Func2) return 2;
-  if (f is _Func3) return 3;
-  if (f is _Func4) return 4;
-  if (f is _Func5) return 5;
-  if (f is _Func6) return 6;
-  if (f is _Func7) return 7;
-  if (f is _Func8) return 8;
-  if (f is _Func9) return 9;
-  if (f is _Func10) return 10;
-  if (f is _Func11) return 11;
-  if (f is _Func12) return 12;
-  if (f is _Func13) return 13;
-  if (f is _Func14) return 14;
-  if (f is _Func15) return 15;
-  return SUPPORTED_ARGS + 1;
-}
-
-/// Returns the maximum number of arguments that [f] takes as input, which is
-/// the total number of required and optional arguments of [f]. If
-/// [f] may take more than [SUPPORTED_ARGS] required arguments, this function
-/// returns `-1`. However, if it takes less required arguments, but more than
-/// [SUPPORTED_ARGS] arguments including optional arguments, the result will be
-/// [SUPPORTED_ARGS].
-///
-/// For instance, the current implementation only supports calculating the
-/// number of arguments between `0` and [SUPPORTED_ARGS].  If the function
-/// takes more than [SUPPORTED_ARGS] mandatory arguments, this function
-/// returns `-1`, but if the funtion takes
-/// `8` mandatory arguments and `10` optional arguments, this function returns
-/// [SUPPORTED_ARGS].
-int maxArgs(Function f) {
-  // We could perform a full modified binary search but we really only care
-  // about performance for functions with fewer than 4 arguments.
-  if (f is! _Func2) {
-    if (f is _Func1) return 1;
-    if (f is _Func0) return 0;
-    if (f is! _Func4 && f is _Func3) return 3;
-    // Fall through to the slow case as the function has has maxArgs > 3.
-  } else if (f is! _Func4) {
-    return f is _Func3 ? 3 : 2;
-  }
-
-  if (f is _Func15) return 15;
-  if (f is _Func14) return 14;
-  if (f is _Func13) return 13;
-  if (f is _Func12) return 12;
-  if (f is _Func11) return 11;
-  if (f is _Func10) return 10;
-  if (f is _Func9) return 9;
-  if (f is _Func8) return 8;
-  if (f is _Func7) return 7;
-  if (f is _Func6) return 6;
-  if (f is _Func5) return 5;
-  if (f is _Func4) return 4;
-  if (f is _Func3) return 3;
-  if (f is _Func2) return 2;
-  if (f is _Func1) return 1;
-  if (f is _Func0) return 0;
-  return -1;
-}
-
-/// Returns whether [f] can accept [n] arguments.
-/// This is equivalent to
-/// `n >= minArgs(f) && n <= maxArgs(f)`
-/// when [f] accepts at most [SUPPORTED_ARGS].
-bool canAcceptNArgs(Function f, int n) {
-  switch (n) {
-    case 0:
-      return f is _Func0;
-    case 1:
-      return f is _Func1;
-    case 2:
-      return f is _Func2;
-    case 3:
-      return f is _Func3;
-    case 4:
-      return f is _Func4;
-    case 5:
-      return f is _Func5;
-    case 6:
-      return f is _Func6;
-    case 7:
-      return f is _Func7;
-    case 8:
-      return f is _Func8;
-    case 9:
-      return f is _Func9;
-    case 10:
-      return f is _Func10;
-    case 11:
-      return f is _Func11;
-    case 12:
-      return f is _Func12;
-    case 13:
-      return f is _Func13;
-    case 14:
-      return f is _Func14;
-    case 15:
-      return f is _Func15;
-  }
-  return false;
-}
-
-/// Shallow comparison of two lists.
-bool compareLists(List a, List b, {bool unordered: false}) {
-  if (a == null && b != null) return false;
-  if (a != null && b == null) return false;
-  if (a.length != b.length) return false;
-  if (unordered) {
-    var countMap = {};
-    for (var x in b) {
-      var count = countMap[x];
-      if (count == null) count = 0;
-      countMap[x] = count + 1;
-    }
-    for (var x in a) {
-      var count = countMap[x];
-      if (count == null) return false;
-      if (count == 1) {
-        countMap.remove(x);
-      } else {
-        countMap[x] = count - 1;
-      }
-    }
-    return countMap.isEmpty;
-  } else {
-    for (int i = 0; i < a.length; i++) {
-      if (a[i] != b[i]) return false;
-    }
-  }
-  return true;
-}
-
-/// Shallow comparison of two maps.
-bool compareMaps(Map a, Map b) {
-  if (a == null && b != null) return false;
-  if (a != null && b == null) return false;
-  if (a.length != b.length) return false;
-  for (var k in a.keys) {
-    if (!b.containsKey(k) || a[k] != b[k]) return false;
-  }
-  return true;
-}