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-// Copyright (C) 2010 - DIGITEO - Michael Baudin
-//
-// This file must be used under the terms of the GNU LGPL license.
-
-function errmsg = Checklhs ( funname , lhs , lhsset )
- // Generates an error if the number of LHS is not in given set.
- //
- // Calling Sequence
- // errmsg = Checklhs ( funname , lhs , lhsset )
- //
- // Parameters
- // funname : a 1 x 1 matrix of strings, the name of the calling function.
- // lhs : a 1 x 1 matrix of floating point integers, the actual number of output arguments
- // lhsset : a 1 x n or n x 1 matrix of floating point integers, the authorized number of output arguments
- // errmsg : a 1 x 1 matrix of strings, the error message. If there was no error, the error message is the empty matrix.
- //
- // Description
- // This function is designed to be used to design functions with
- // variable number of output arguments.
- // Notice that it is useless to call this function if the
- // function definition does not use the varargout statement.
- // Notice that a function as a minimum of 1 output argument.
- // Last update : 29/07/2010.
- //
- // Examples
- // // The function takes 3 input arguments and 1/2 output arguments
- // function varargout = myfunction ( x1 , x2 , x3 )
- // [lhs, rhs] = argn()
- // Checkrhs ( "myfunction" , rhs , 3 : 3 )
- // Checklhs ( "myfunction" , lhs , 1 : 2 )
- // y1 = x1 + x2
- // y2 = x2 + x3
- // varargout(1) = y1
- // if ( lhs == 2 ) then
- // varargout(2) = y2
- // end
- // endfunction
- // // Calling sequences which work
- // myfunction ( 1 , 2 , 3 )
- // y1 = myfunction ( 1 , 2 , 3 )
- // [ y1 , y2 ] = myfunction ( 1 , 2 , 3 )
- // // Calling sequences which generate an error
- // [ y1 , y2 , y3 ] = myfunction ( 1 , 2 , 3 )
- //
- // // The function takes 1 or 3 output arguments, but not 2
- // function varargout = myfunction ( x1 , x2 , x3 )
- // [lhs, rhs] = argn()
- // Checkrhs ( "myfunction" , rhs , 3 : 3 )
- // Checklhs ( "myfunction" , lhs , [1 3] )
- // y1 = x1 + x2
- // y2 = x2 + x3
- // y3 = x1 + x3
- // varargout(1) = y1
- // if ( lhs == 3 ) then
- // varargout(2) = y2
- // varargout(3) = y3
- // end
- // endfunction
- // // Calling sequences which work
- // myfunction ( 1 , 2 , 3 )
- // y1 = myfunction ( 1 , 2 , 3 )
- // [ y1 , y2 , y3 ] = myfunction ( 1 , 2 , 3 )
- // // Calling sequences which generate an error
- // [y1 , y2] = myfunction ( 1 , 2 , 3 )
- //
- // Authors
- // Michael Baudin - 2010 - DIGITEO
- //
-
- errmsg = []
- if ( and ( lhs <> lhsset ) ) then
- lhsstr = strcat(string(lhsset)," ")
- errmsg = msprintf(gettext("%s: Unexpected number of output arguments : %d provided while the expected number of output arguments should be in the set [%s]."), funname , lhs , lhsstr );
- error(errmsg)
- end
-endfunction
-
-
-