Differences

This shows you the differences between two versions of the page.

--- language:types2:data [2025/11/20 15:27] – [Pure structures] rajit
+++ language:types2:data [2026/08/07 11:19] (current) – [User-defined data types] rajit
@@ Line 1: / Line 1: @@
 ====== User-defined data types ======
-A user-defined data type is defined using ''deftype''. These are classified into three categories:
+A user-defined data type is defined using ''deftype''. These are classified into two categories:
    * //data types//, which correspond to representations of the built-in ''int'' and ''bool'' types.
    * //structures//, which are a collection of data types.
-   * //parameter structures//, which are a collection of parameter types.
-In addition, data types can also be   //enumerations//, which are data types with symbolic  values.
+A data type can also be defined to be an //enumeration// using **defenum**; enumerations are data types with symbolic  values. In addition, ACT supports //parameter structures//, which are a collection of parameter types, which are defined using **defptype**
 ===== Data types =====