-- File:        GaussSingleIntegration.cdl
-- Created:     Tue May 14 18:15:11 1991
-- Author:      Laurent PAINNOT
--              <lpa@topsn3>
---Copyright:    Matra Datavision 1991, 1992



class GaussSingleIntegration from math
    	---Purpose:
    	-- This class implements the integration of a function of a single variable
    	-- between the parameter bounds Lower and Upper.
    	--  Warning: Order must be inferior or equal to 61.


uses Function from math,
     OStream from Standard

raises NotDone from StdFail

is
     Create
     returns GaussSingleIntegration;
     
     Create(F: in out Function; Lower, Upper: Real; Order: Integer)
     	---Purpose:
     	-- The Gauss-Legendre integration with N = Order points of integration,
     	-- is done on the function F between the bounds Lower and Upper. 
    
     returns GaussSingleIntegration;
     
     Create(F: in out Function; Lower, Upper: Real; Order: Integer; Tol: Real)
     	---Purpose:
     	-- The Gauss-Legendre integration with N = Order points of integration  and 
     	-- given tolerance = Tol is done on the function F between the bounds  
     	-- Lower and Upper. 
    
     returns GaussSingleIntegration;

     Perform(me: in out; F: in out Function; Lower, Upper: Real; Order: Integer)      
	---Purpose:  perfoms  actual  computation  
     is private;
	
     IsDone(me)
     	---Purpose: returns True if all has been correctly done.
    	---C++: inline

     returns Boolean
     is static;
     
     
     Value(me)
     	---Purpose: returns the value of the integral.
    	---C++: inline

     returns Real
     raises NotDone
     is static;


    Dump(me; o: in out OStream)
    	---Purpose: Prints information on the current state of the object.

    is static;


fields

Val: Real;
Done: Boolean;

end GaussSingleIntegration;