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// Copyright 2014 The Flutter Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style license that can be | ||
// found in the LICENSE file. | ||
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// ignore_for_file: do_not_use_environment, comment_references | ||
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/// A constant that is true if the application was compiled in release mode. | ||
/// | ||
/// More specifically, this is a constant that is true if the application was | ||
/// compiled in Dart with the '-Ddart.vm.product=true' flag. | ||
/// | ||
/// Since this is a const value, it can be used to indicate to the compiler that | ||
/// a particular block of code will not be executed in release mode, and hence | ||
/// can be removed. | ||
/// | ||
/// Generally it is better to use [kDebugMode] or `assert` to gate code, since | ||
/// using [kReleaseMode] will introduce differences between release and profile | ||
/// builds, which makes performance testing less representative. | ||
/// | ||
/// See also: | ||
/// | ||
/// * [kDebugMode], which is true in debug builds. | ||
/// * [kProfileMode], which is true in profile builds. | ||
const bool kReleaseMode = bool.fromEnvironment('dart.vm.product'); | ||
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/// A constant that is true if the application was compiled in profile mode. | ||
/// | ||
/// More specifically, this is a constant that is true if the application was | ||
/// compiled in Dart with the '-Ddart.vm.profile=true' flag. | ||
/// | ||
/// Since this is a const value, it can be used to indicate to the compiler that | ||
/// a particular block of code will not be executed in profile mode, an hence | ||
/// can be removed. | ||
/// | ||
/// See also: | ||
/// | ||
/// * [kDebugMode], which is true in debug builds. | ||
/// * [kReleaseMode], which is true in release builds. | ||
const bool kProfileMode = bool.fromEnvironment('dart.vm.profile'); | ||
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/// A constant that is true if the application was compiled in debug mode. | ||
/// | ||
/// More specifically, this is a constant that is true if the application was | ||
/// not compiled with '-Ddart.vm.product=true' and '-Ddart.vm.profile=true'. | ||
/// | ||
/// Since this is a const value, it can be used to indicate to the compiler that | ||
/// a particular block of code will not be executed in debug mode, and hence | ||
/// can be removed. | ||
/// | ||
/// An alternative strategy is to use asserts, as in: | ||
/// | ||
/// ```dart | ||
/// assert(() { | ||
/// // ...debug-only code here... | ||
/// return true; | ||
/// }()); | ||
/// ``` | ||
/// | ||
/// See also: | ||
/// | ||
/// * [kReleaseMode], which is true in release builds. | ||
/// * [kProfileMode], which is true in profile builds. | ||
const bool kDebugMode = !kReleaseMode && !kProfileMode; | ||
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/// The epsilon of tolerable double precision error. | ||
/// | ||
/// This is used in various places in the framework to allow for floating point | ||
/// precision loss in calculations. Differences below this threshold are safe to | ||
/// disregard. | ||
const double precisionErrorTolerance = 1e-10; | ||
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/// A constant that is true if the application was compiled to run on the web. | ||
/// | ||
/// See also: | ||
/// | ||
/// * [defaultTargetPlatform], which is used by themes to find out which | ||
/// platform the application is running on (or, in the case of a web app, | ||
/// which platform the application's browser is running in). Can be overridden | ||
/// in tests with [debugDefaultTargetPlatformOverride]. | ||
/// * [dart:io.Platform], a way to find out the browser's platform that is not | ||
/// overridable in tests. | ||
const bool kIsWeb = bool.fromEnvironment('dart.library.js_util'); |
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