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--- language:interface [2023/04/09 23:01] – [Parameter types] rajit
+++ language:interface [2025/10/06 11:10] (current) – [Interfaces with functions and macros] rajit
@@ Line 89: / Line 89: @@
 Process type (''ptype'') parameters for templates use the ''@'' character (as in ''@onebit'') in the example above.
+==== Interfaces with functions and macros  ====
+An interface type can also include function and macro prototypes.
+<code act>
+export template<pint N> interface policy()
+{
+  methods {
+     function idx() : int<N>;
+     macro update(int<N> v);
+  }
+}
+</code>
+This defines an interface that exports two methods. Note that, unlike port parameters, method names cannot be changed when a type exports an interface.