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49 lines
1.6 KiB
Plaintext
Executable File
49 lines
1.6 KiB
Plaintext
Executable File
-- File: Function.cdl
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-- Created: Mon May 6 10:54:17 1991
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-- Author: Laurent PAINNOT
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-- <lpa@topsn3>
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---Copyright: Matra Datavision 1991, 1992
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deferred class Function from math
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---Purpose: This abstract class describes the virtual functions
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-- associated with a Function of a single variable.
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is
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Value(me: in out; X: Real; F: out Real)
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---Purpose: Computes the value of the function <F> for a given value of
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-- variable <X>.
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-- returns True if the computation was done successfully,
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-- False otherwise.
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returns Boolean
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is deferred;
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GetStateNumber(me: in out)
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---Purpose: returns the state of the function corresponding to the
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-- latest call of any methods associated with the function.
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-- This function is called by each of the algorithms
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-- described later which defined the function Integer
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-- Algorithm::StateNumber(). The algorithm has the
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-- responsibility to call this function when it has found
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-- a solution (i.e. a root or a minimum) and has to maintain
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-- the association between the solution found and this
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-- StateNumber.
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-- Byu default, this method returns 0 (which means for the
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-- algorithm: no state has been saved). It is the
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-- responsibility of the programmer to decide if he needs
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-- to save the current state of the function and to return
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-- an Integer that allows retrieval of the state.
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returns Integer
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is virtual;
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end Function;
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