delphi - 记录初始化数组

Question

我有这种类型:

type
  TFieldRec = array of record
    FieldName: string;
    Value: Variant;
    DataType: TFieldType;
    Data: Pointer;
  end;

代码:

var
  FR: TFieldRec;
SetLength(FR, 5);

我的问题:是否保证每个记录元素都将使用默认值进行初始化？

'', Unassigned, ftUnknown, nil

在调试器中我可以看到这是真的。但我记得记录应该用 Initialize 初始化(或者是 Finalize？)

Answer 1

My question: is it guaranteed that each record element will be initialized with default values?

是的，这是有保证的。

SetLength documentation说(我的重点):

Existing elements in the array are preserved and newly allocated space is set to 0 or nil.