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<-/2
+Obj <-
+Mesg
object
term
Sends Mesg to Obj. A send message. The class of Obj must have a method defined for this message.
A clause with <-/2
as the principal functor of its head is a
method definition clause. Such clauses only occur within the scope of
a class definition. They are expanded at compile time.
instantiation_error
either argument is unbound.
domain_error
Mesg is not callable or Obj is not a valid object.
existence_error
Mesg is not a defined message for Obj.
For reasons of efficiency, an Existence Error
will only be raised if the code that sends the message is
compiled with debugging enabled (see debug_message
), or if the
message is not determined at compile-time. In other circumstances,
the message will simply fail.
Calls to the <-/2
predicate will be compiled into
more efficient code if the obj_decl
module is loaded at compile time.
<</2
, >>/2
, direct_message/4
, message/4