odeint/doc/concepts/state_wrapper.qbk
2014-03-26 08:20:20 +01:00

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[/============================================================================
Boost.odeint
Copyright 2011 Mario Mulansky
Copyright 2012 Karsten Ahnert
Use, modification and distribution is subject to the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
=============================================================================/]
[section State Wrapper]
[heading Description]
The `State Wrapper` concept describes the way odeint creates temporary state objects to store intermediate results within the stepper's `do_step` methods.
[heading Notation]
[variablelist
[[`State`] [A type that is the `state_type` of the ODE]]
[[`WrappedState`] [A type that is a model of State Wrapper for the state type `State`.]]
[[`x`] [Object of type `State`]]
[[`w`] [Object of type `WrappedState`]]
]
[heading Valid Expressions]
[table
[[Name] [Expression] [Type] [Semantics]]
[[Get resizeability] [`is_resizeable< State >`] [`boost::false_type` or `boost::true_type`] [Returns `boost::true_type` if the `State` is resizeable, `boost::false_type` otherwise.]]
[[Create `WrappedState` type] [`state_wrapper< State >`] [`WrappedState`] [Creates the type for a `WrappedState` for the state type `State`]]
[[Constructor] [`WrappedState()`] [`WrappedState`] [Constructs a state wrapper with an empty state]]
[[Copy Constructor] [`WrappedState( w )`] [`WrappedState`] [Constructs a state wrapper with a state of the same size as the state in `w`]]
[[Get state] [`w.m_v`] [`State`] [Returns the `State` object of this state wrapper.]]
]
[endsect]