Instances of a structured type hold more than one value. Structured types include sets, arrays, records, and files as well as class, class-reference, and interface types. Except for sets, which hold ordinal values only, structured types can contain other structured types; a type can have unlimited levels of structuring.
By default, the values in a structured type are aligned on word or double-word boundaries for faster access. When you declare a structured type, you can include the reserved word packed to implement compressed data storage. For example, type TNumbers = packed array [1..100] of Real;
Using packed slows data access and, in the case of a character array, affects type compatibility (for more information, see Memory management).
This topic covers the following structured types:
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