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Code Issues 1 Releases Wiki Activity

Use ATEND macros to add fields to abstract types.

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This means we can add new properties to abstract types without
breaking old code. We can also make simple abstract types without
needing to add many NULL fields to the type.
This commit is contained in:
Calvin Rose
2020-01-20 13:06:50 -06:00
parent 3c87d89df3
commit 2dd852da54
9 changed files with 26 additions and 49 deletions
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16
src/include/janet.h
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@@ -910,6 +910,22 @@ struct JanetAbstractType {
Janet(*next)(void *p, Janet key);
};
/* Some macros to let us add extra types to JanetAbstract types without
* needing to changing native modules that declare them as static const
* structures. If more fields are added, these macros are modified to include
* default values (usually NULL). This silences missing field warnings. */
#define JANET_ATEND_NAME NULL,JANET_ATEND_GC
#define JANET_ATEND_GC NULL,JANET_ATEND_GCMARK
#define JANET_ATEND_GCMARK NULL,JANET_ATEND_GET
#define JANET_ATEND_GET NULL,JANET_ATEND_PUT
#define JANET_ATEND_PUT NULL,JANET_ATEND_MARSHAL
#define JANET_ATEND_MARSHAL NULL,JANET_ATEND_UNMARSHAL
#define JANET_ATEND_UNMARSHAL NULL,JANET_ATEND_TOSTRING
#define JANET_ATEND_TOSTRING NULL,JANET_ATEND_COMPARE
#define JANET_ATEND_COMPARE NULL,JANET_ATEND_HASH
#define JANET_ATEND_HASH NULL,JANET_ATEND_NEXT
#define JANET_ATEND_NEXT
struct JanetReg {
const char *name;
JanetCFunction cfun;