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class.c: refactor ROM method tables to array-of-structs layout

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Replace the parallel-arrays (struct-of-arrays) ROM method table
layout with an array-of-structs layout where each mrb_mt_entry
bundles its function pointer and symbol key together.

New MRB_MT_ENTRY() and MRB_MT_ROM_TAB() macros simplify ROM table
definitions from a 3-part pattern (SIZE define + anonymous struct +
mrb_mt_tbl) to a 2-part pattern (entries array + mrb_mt_tbl).

Internal mt_* functions in class.c are simplified: single memmove/
memcpy operations replace paired key+value operations.

Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2026-02-19 23:59:30 +09:00
parent cfd9214b3d
commit bde2202100
34 changed files with 969 additions and 2337 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/object.c
+22 -71
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@@ -322,82 +322,33 @@ false_to_s(mrb_state *mrb, mrb_value obj)
}
/* ---------------------------*/
#define NIL_ROM_MT_SIZE 6
static struct {
union mrb_mt_ptr vals[NIL_ROM_MT_SIZE];
mrb_sym keys[NIL_ROM_MT_SIZE];
} nil_rom_data = {
.vals = {
{ .func = false_and },
{ .func = false_or },
{ .func = false_xor },
{ .func = mrb_true },
{ .func = nil_to_s },
{ .func = nil_inspect },
},
.keys = {
MRB_MT_KEY(MRB_OPSYM(and), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_OPSYM(or), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_OPSYM(xor), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM_Q(nil), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(to_s), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(inspect), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
}
};
static mrb_mt_tbl nil_rom_mt = {
NIL_ROM_MT_SIZE, NIL_ROM_MT_SIZE,
(union mrb_mt_ptr*)&nil_rom_data, NULL
static mrb_mt_entry nil_rom_entries[] = {
MRB_MT_ENTRY(false_and, MRB_OPSYM(and), MRB_MT_FUNC),
MRB_MT_ENTRY(false_or, MRB_OPSYM(or), MRB_MT_FUNC),
MRB_MT_ENTRY(false_xor, MRB_OPSYM(xor), MRB_MT_FUNC),
MRB_MT_ENTRY(mrb_true, MRB_SYM_Q(nil), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(nil_to_s, MRB_SYM(to_s), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(nil_inspect, MRB_SYM(inspect), MRB_MT_FUNC|MRB_MT_NOARG),
};
static mrb_mt_tbl nil_rom_mt = MRB_MT_ROM_TAB(nil_rom_entries);
#define TRUE_ROM_MT_SIZE 5
static struct {
union mrb_mt_ptr vals[TRUE_ROM_MT_SIZE];
mrb_sym keys[TRUE_ROM_MT_SIZE];
} true_rom_data = {
.vals = {
{ .func = true_and },
{ .func = true_or },
{ .func = true_xor },
{ .func = true_to_s },
{ .func = true_to_s },
},
.keys = {
MRB_MT_KEY(MRB_OPSYM(and), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_OPSYM(or), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_OPSYM(xor), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(to_s), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(inspect), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
}
};
static mrb_mt_tbl true_rom_mt = {
TRUE_ROM_MT_SIZE, TRUE_ROM_MT_SIZE,
(union mrb_mt_ptr*)&true_rom_data, NULL
static mrb_mt_entry true_rom_entries[] = {
MRB_MT_ENTRY(true_and, MRB_OPSYM(and), MRB_MT_FUNC),
MRB_MT_ENTRY(true_or, MRB_OPSYM(or), MRB_MT_FUNC),
MRB_MT_ENTRY(true_xor, MRB_OPSYM(xor), MRB_MT_FUNC),
MRB_MT_ENTRY(true_to_s, MRB_SYM(to_s), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(true_to_s, MRB_SYM(inspect), MRB_MT_FUNC|MRB_MT_NOARG),
};
static mrb_mt_tbl true_rom_mt = MRB_MT_ROM_TAB(true_rom_entries);
#define FALSE_ROM_MT_SIZE 5
static struct {
union mrb_mt_ptr vals[FALSE_ROM_MT_SIZE];
mrb_sym keys[FALSE_ROM_MT_SIZE];
} false_rom_data = {
.vals = {
{ .func = false_and },
{ .func = false_or },
{ .func = false_xor },
{ .func = false_to_s },
{ .func = false_to_s },
},
.keys = {
MRB_MT_KEY(MRB_OPSYM(and), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_OPSYM(or), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_OPSYM(xor), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(to_s), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(inspect), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
}
};
static mrb_mt_tbl false_rom_mt = {
FALSE_ROM_MT_SIZE, FALSE_ROM_MT_SIZE,
(union mrb_mt_ptr*)&false_rom_data, NULL
static mrb_mt_entry false_rom_entries[] = {
MRB_MT_ENTRY(false_and, MRB_OPSYM(and), MRB_MT_FUNC),
MRB_MT_ENTRY(false_or, MRB_OPSYM(or), MRB_MT_FUNC),
MRB_MT_ENTRY(false_xor, MRB_OPSYM(xor), MRB_MT_FUNC),
MRB_MT_ENTRY(false_to_s, MRB_SYM(to_s), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(false_to_s, MRB_SYM(inspect), MRB_MT_FUNC|MRB_MT_NOARG),
};
static mrb_mt_tbl false_rom_mt = MRB_MT_ROM_TAB(false_rom_entries);
void
mrb_init_object(mrb_state *mrb)