Harry Terkelsen
382996f41c
BUG= R=rnystrom@google.com Review URL: https://codereview.chromium.org/1967773005 .
54 lines
1.5 KiB
Dart
54 lines
1.5 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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part of dart.math;
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/**
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* A generator of random bool, int, or double values.
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*
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* The default implementation supplies a stream of
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* pseudo-random bits that are not suitable for cryptographic purposes.
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*
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* Use the Random.secure() constructor for cryptographic
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* purposes.
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*/
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abstract class Random {
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/**
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* Creates a random number generator.
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*
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* The optional parameter [seed] is used to initialize the
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* internal state of the generator. The implementation of the
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* random stream can change between releases of the library.
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*/
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external factory Random([int seed]);
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/**
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* Creates a cryptographically secure random number generator.
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*
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* If the program cannot provide a cryptographically secure
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* source of random numbers, it throws an [UnsupportedError].
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*/
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external factory Random.secure();
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/**
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* Generates a non-negative random integer uniformly distributed in the range
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* from 0, inclusive, to [max], exclusive.
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*
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* Implementation note: The default implementation supports [max] values
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* between 1 and (1<<32) inclusive.
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*/
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int nextInt(int max);
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/**
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* Generates a non-negative random floating point value uniformly distributed
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* in the range from 0.0, inclusive, to 1.0, exclusive.
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*/
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double nextDouble();
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/**
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* Generates a random boolean value.
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*/
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bool nextBool();
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}
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