5 Function and Macro Reference
define-c-struct
Macro
- Summary
- Defines an FLI structure type specifier corresponding to the C
structtype. - Package
fli- Signature
define-c-struct name &rest slot-descriptions => listslot-descriptions ::= {slot-name | (slot-name slot-type)}*- Arguments
-
- name
The name of the new structure type specifier.
- slot-descriptions
A sequence of symbols, possibly with type descriptions, naming the slots of the structure.
- slot-name
A symbol naming the slot.
- slot-type
The FLI type of the slot.
- Values
-
- list
The list
(:structname).
- Description
- The macro
define-c-structis used to define an FLI structure type specifier, which corresponds to the Cstructtype. It is a convenience function, as a structure type could also be defined usingdefine-foreign-type. - A structure is an aggregate type, or collection, of other FLI types. The types contained in a structure are referred to as slots, and can be accessed using the
foreign-slot-typeandforeign-slot-valuefunctions. - Example
- In the following example a structure is defined using
define-c-struct, and the corresponding C code is given.
(fli:define-c-struct a-point (x :int)
(y :int)
(color :byte)
(ident :char))
struct a-point {
int x;
int y;
byte color;
char ident;
};