call

Command: call


Synopsis
dict /f call -> -
References

[1] Ruediger Kupper SLI library management
HRI-EU Report 06/05 Honda Research Institute Europe GmbH 2006.

Description
In SLI an object-oriented programming style can be
implemented by using dictionaries as objects.
These object dictionaries then contain functions as well as data.
The command call can be used to call a "member" of an object.

In calling the member-functions the following steps are performed:
1. the object-dictionary is pushed on the dictionary stack
2. the name is executed in the new dictionary context
3. the object-dictionary is poped off the dictionary stack.
Thus during the execution of the function the entire namespace of the
object-dictionary is accessible.

The invocation of call is thus comparable but not equivalent
to the following sequence of SLI commands:
/call
{
exch
begin
load exec
end
} def

File
lib/sli/oosupport.sli
Diagnostics
If the called member is not part of the object dictionary
an UnknownMember error is raised.

SeeAlso