astBeginastBegin
-
Begin a new AST context
- Description:
- This macro invokes a function to begin a new AST context.
Any ObjectObject pointers
created within this context will be annulled when it is later
ended using astEndastEnd (just as if astAnnulastAnnul had been invoked),
unless they have first been exported using astExportastExport or rendered
exempt using astExemptastExempt. If
annulling a pointer causes an Object's RefCountRefCount attribute to
fall to zero (which happens when the last pointer to it is
annulled), then the Object will be deleted.
- Synopsis:
- void astBegin
- Class Applicability:
-
Object
-
This macro applies to all Objects.
- Notes:
- astBegin attempts to execute even if the AST error status
is set on entry.
- Contexts delimited by astBegin and astEnd may be nested to any
depth.