=== Interface Import Specifiers

A *interface import specifier* specifies that the ports of a
<<Definitions_Port-Interface-Definitions,port interface definition>>
are to be added as members of a
<<Definitions_Component-Definitions,component definition>>
or a
<<Definitions_Port-Interface-Definitions,port interface definition>>.

==== Syntax

`import`
<<Scoping-of-Names_Qualified-Identifiers,_qual-ident_>>

==== Semantics

The qualified identifier must
<<Scoping-of-Names_Resolution-of-Qualified-Identifiers,refer to>>
a <<Definitions_Port-Interface-Definitions,port interface definition>>.

An interface import specifier is resolved to a set _S_ of port interfaces
as follows:

. Recursively <<Definitions_Port-Interface-Definitions,resolve the port
interface definition _D_>>
named in the specifier.

. Let _S_ be the set of port interfaces represented by _D_.

==== Example

[source,fpp]
----
@ Interface I
interface I {

  @ Port pIn
  sync input port pIn: P

}

@ Interface J {

  @ Import interface I
  @ This brings in port pIn
  import I

  @ Add port pOut
  output port pOut: P

}

@ Component C
passive component C {

  @ Import interface J
  @ This brings in pIn and pOut
  import J

}
----