IronRuby.Compiler.Ast.IfExpression.IfExpression C# (CSharp) Метод

        public IfExpression(Expression/*!*/ condition, Statements/*!*/ body, List<ElseIfClause>/*!*/ elseIfClauses, SourceSpan location)
            : base(location) {
            ContractUtils.RequiresNotNull(body, "body");
            ContractUtils.RequiresNotNull(condition, "condition");
            ContractUtils.RequiresNotNull(elseIfClauses, "elseIfClauses");

            // all but the last clause should have non-null conditions:
            for (int i = 0; i < elseIfClauses.Count - 1; i++) {
                if (elseIfClauses[i].Condition == null) {
                    throw ExceptionUtils.MakeArgumentItemNullException(i, "elseIfClauses");
                }
            }

            _condition = condition;
            _body = body;
            _elseIfClauses = elseIfClauses;
        }