#### IfcListToArray

##### Semantic definitions at the function

Function Definition

Definition from ISO/CD 10303-42:1992: The function converts a generic list to an array with pre-determined array bounds. If the array bounds are incompatible with the number of elements in the original list a null result is returned. This function is used to construct the array of control points and weights used in the b-spline entities.

> NOTE Corresponding STEP function: list_to_array. Please refer to ISO/IS 10303-42:1994, p.119 for the final definition of the formal standard.
> HISTORY New function in IFC Release 2x Edition 2

##### Formal representations

EXPRESS Specification

FUNCTION IfcListToArray
(Lis : LIST [0:?] OF GENERIC : T;
Low,U : INTEGER) : ARRAY OF GENERIC : T;
LOCAL
N : INTEGER;
Res : ARRAY [Low:U] OF GENERIC : T;
END_LOCAL;
N := SIZEOF(Lis);
IF (N <> (U-Low +1)) THEN
RETURN(?);
ELSE
Res := [Lis[1] : N];
REPEAT i := 2 TO N;
Res[Low+i-1] := Lis[i];
END_REPEAT;
RETURN(Res);
END_IF;
END_FUNCTION;

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