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-- File: Units_ShiftedToken.cdl
-- Created: Thu Nov 5 15:19:54 1992
-- Author: Gilles DEBARBOUILLE
-- <gde@bravox>
---Copyright: Matra Datavision 1992
class ShiftedToken from Units
---Purpose: The ShiftedToken class inherits from Token and
-- describes tokens which have a gap in addition of
-- the multiplicative factor. This kind of token
-- allows the description of linear functions which
-- do not pass through the origin, of the form :
--
-- y = ax +b
--
-- where <x> and <y> are the unknown variables, <a>
-- the mutiplicative factor, and <b> the gap relative
-- to the ordinate axis.
--
-- An example is the tranlation between the Celsius
-- and Fahrenheit degree of temperature.
inherits
Token from Units
uses
Dimensions from Units
--raises
is
Create(aword , amean : CString ; avalue , amove : Real ; adimensions : Dimensions from Units)
---Level: Internal
---Purpose: Creates and returns a shifted token. <aword> is a
-- string containing the available word, <amean> gives
-- the signification of the token, <avalue> is the
-- numeric value of the dimension, <amove> is the gap,
-- and <adimensions> is the dimension of the given word
-- <aword>.
returns mutable ShiftedToken from Units;
Creates(me) returns mutable Token from Units
---Level: Internal
---Purpose: Creates and returns a token, which is a ShiftedToken.
is redefined;
Move(me) returns Real
---Level: Internal
---Purpose: Returns the gap <themove>
is static;
Multiplied(me ; avalue : Real) returns Real
---Level: Internal
---Purpose: This virtual method is called by the Measurement
-- methods, to compute the measurement during a
-- conversion.
is redefined;
Divided(me ; avalue : Real) returns Real
---Level: Internal
---Purpose: This virtual method is called by the Measurement
-- methods, to compute the measurement during a
-- conversion.
is redefined;
Destroy ( me : mutable ) is redefined;
---Level: Internal
---Purpose: Destroies the Token
---C++: alias ~
Dump(me ; ashift , alevel : Integer)
---Level: Internal
is redefined;
fields
themove : Real;
end ShiftedToken;
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