Introducing structs.

* args.c (args_cat_zap): New function.

* args.h: (args_cat_zap): Declared.

* eval.c (struct_lit_s): New symbol variable.
(eval_init): Initialize struct_lit_s.

* eval.h (struct_lit_s): Declared.

* gc.c (finalize): If a symbol has a struct slot
hash attached to it, we must free it when
the symbol is reclaimed.

* lib.c (make_sym): Initialize symbol's slot_cache pointer
to null.
(copy): Copy structure objects.
(init): Call struct_init to initialize struct module.

* lib.h (SLOT_CACHE_SIZE): New preprocessor symbol
(slot_cache_line_t, slot_cache_t): New typedefs.
(struct sym): New member, slot_cache.

* lisplib.c (struct_set_entries, struct_instantiate):  New
static functions.
(liplib_init): Register new functions in dl_table.

parser.y (HASH_S): New terminal symbol.
(struct): New grammar rule.
(n_expr): Derive struct.
(yybadtoken): Map HASH_S to #S string.

parser.l (grammar): Recognize #S and return HASH_S token.

share/txr/stdlib/place.tl (slot): New defplace.

share/txr/stdlib/struct.tl: New file.

struct.c: New file.

struct.h: New file.

* Makefile (OBJS): Adding struct.o.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index 11a4da5f..8b41696f 100644
--- a/lib.c
+++ b/lib.c
@@ -64,6 +64,7 @@
 #include "syslog.h"
 #include "glob.h"
 #include "cadr.h"
+#include "struct.h"
 #include "txr.h"
 
 #define max(a, b) ((a) > (b) ? (a) : (b))
@@ -3728,6 +3729,7 @@ val make_sym(val name)
   obj->s.type = SYM;
   obj->s.name = name;
   obj->s.package = nil;
+  obj->s.slot_cache = 0;
   return obj;
 }
 
@@ -6560,6 +6562,8 @@ val copy(val seq)
       return copy_hash(seq);
     if (seq->co.cls == random_state_s)
       return make_random_state(seq);
+    if (structp(seq))
+      return copy_struct(seq);
     /* fallthrough */
   default:
     type_mismatch(lit("copy: cannot copy object of type ~s"),
@@ -7660,6 +7664,7 @@ void init(const wchar_t *pn, mem_t *(*oom)(mem_t *, size_t),
   glob_init();
 #endif
   cadr_init();
+  struct_init();
 
   gc_state(gc_save);
 }