A symbol or list naming the return type or an object to contain the returned value.
A string naming an Objective-C class or a pointer to an Objective-C foreign object.
A string naming the method to invoke.
Arguments to the method.
The function
invoke-into
is used to call Objective-C instance and class methods that return specific types which are not supported directly by invoke or for methods that return values of some foreign structure type where an existing object should be filled with the value. The meaning of the
class-or-object-pointer
,
method
and
args
is identical to invoke.
The value of result controls how the value of the method is converted and returned as follows:
If the result type of the method is
id
, then the value is assumed to be an Objective-C object of class
NSString
and is converted a string and returned. Otherwise no special conversion is performed.
If the result type of the method is
id
, then the value is assumed to be an Objective-C object of class
NSArray
and is converted a vector and returned. Otherwise no special conversion is performed.
a list of the form
(array
elt-type
)
If the result type of the method is
id
, then the value is assumed to be an Objective-C object of class
NSArray
and is recursively converted a vector and returned. The component
elt-type
should be either
string
,
array
or another list of the form
(array
sub-elt-type
)
and is used to control the conversion of the elements.
Otherwise no special conversion is performed.
If the result type of the method is
unsigned char *
, then the value is returned as a pointer of type objc-c-string.
Otherwise no special conversion is performed.
a list of the form
(:pointer
elt-type
)
If the result type of the method is
unsigned char *
, then the value is returned as a pointer with element type
elt-type
.
Otherwise no special conversion is performed.
a pointer to a foreign structure
If the result type of the method is a foreign structure type defined with define-objc-struct or a built-in structure type such as
NSRect
, the value is copied into the structure pointed to by
result
and the pointer is returned. Otherwise no special conversion is performed.
If the result type of the method is
id
, then the value is assumed to be an Objective-C object of class
NSArray
and is converted to fill the vector, which must be at least as long as the
NSArray
. The vector is returned.
If the result type of the method is
NSRect
,
NSSize
or
NSPoint
then the first 4, 2 or 2 elements respectively of the vector are set to the corresponding components of the result. The vector is returned.
Otherwise no special conversion is performed.
If the result type of the method is
NSRange
then the
car
of the cons is set to the
location
of the range and the
cdr
of the cons is set to the
length
of the range. The cons is returned.