1.76.1 Instance variables

host <-> call_back: bool

When @on, a message sent to the host object (@prolog) will immediately be executed. Otherwise it will be stored in the chain host<-messages for later retrieval by the host language.

Using call_back is the default. Synchronous interfacing (no call_back) harms the functionality as PCE code and host-language code will not be intercallable. Sometimes necessary when PCE is connected to a host language that is not capable of handling callback.

Defaults: @on (use call_back based interface).

See also

host-messages

host <-> language: {prolog,lisp,c}

Language this host is talking too. Currently documentation purposes only.

host <- messages: chain*

Queue of message for the hostlanguage. When a message reaches the host object (@prolog) and host<-call_back is @off, a message object is created from the receiver and arguments and this is appended to this chain for later retrieval by host<-message.

See also

- host<-message
- host-call_back

host <-> system: name

Identifier name for the host language implementation PCE is connected too. Used by pce->banner that prints the banner message when PCE is started. May be useful to solve incompatibility problems between, for example, two different Prolog versions.

All supported languages should be assigned a unique identifier name.

See also

pce->banner