cloneField (ordinal object -- fieldValue)

Returns the field selected by ordinal from object.

• Ref-like selected fields are returned through a read result.
• Other selected fields are cloned through one same-schema temporary value.

Examples

"interface.cloneField" use
"control" use

{} () {} [
  object: {value: 1; ref: 0nx Int32 addressToReference;};
  0 @object cloneField printStack _:;
  1 @object cloneField printStack _:;
] "main" exportFunction

Expected Output During Compilation

Int32
Int32 NIL

interface (methods -- interfaceSchema)

Builds one interface-wrapper schema from one method-description supplier.

• methods is consumed through call.
• The field names of the supplied description become the interface method names.
• Method input schemas are cloned from the supplied descriptions through cloneField.

Generated interface shape

• The generated schema contains a nested Vtable with DIE_FUNC, SIZE, and one entry per declared method.
• The generated wrapper also exposes one nested CALL object with the same method names.
• Each generated CALL method forwards through the stored vtable entry with the current wrapper storage address as self.

implement (getBase getObject -- implementationSchema)

Builds one concrete implementation wrapper from one interface-base supplier and one object supplier.

• getBase supplies the interface base schema.
• getObject supplies the concrete object used by forwarded method calls.
• The generated wrapper forwards each declared method name to the supplied object by the same field name.

Generated implementation shape

• The generated schema stores Base, getObject, and one vtable compatible with the base interface.
• The generated CALL object contains one nested base value together with moved or cloned object fields from the concrete object returned by getObject.
• The generated vtable stores one DIE_FUNC that destroys that concrete object representation and one SIZE function that reports its storage size.
• Forwarded method entries call the corresponding object field by name.

Examples

Generated implementation call

"interface" use
"String" use
"control" use

Mover: [{ move: {value: Int32; result: Int32;}; }] interface;
MoverImpl: [@Mover [{
  move: {value: Int32;} Int32 {} codeRef;
  [1 +] !move
}] implement];

{} Int32 {} [
  impl: MoverImpl;
  ("result=" 41 @impl.CALL.move LF) printList
  0
] "main" exportFunction

Expected Output

result=42

See also

• Function: Callable wrapper schema and callable adaptation helpers.