ASTNodeArray provides access to the children of a node viewed as an array indexed from 0 to Number(n) - 1. This is not an efficient way to iterate children, use the AST_Iter iterator if this is important.

INTERFACE ASTNodeArray;

IMPORT AST;

PROCEDURE Number(n: AST.NODE): CARDINAL;

returns the number of children in node n.

PROCEDURE High(n: AST.NODE): INTEGER;

returns Number(n) - 1

PROCEDURE Ith(n: AST.NODE; i: CARDINAL): AST.NODE;

returns n[i], provided that 0 <= i <= High(n), else a checked run-time error.

END ASTNodeArray.