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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
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mrbgems/mruby-numeric-ext/src/numeric_ext.c
+11 -31
View File
@@ -480,38 +480,18 @@ int_sqrt(mrb_state *mrb, mrb_value self)
}
}
#define INTEGER_EXT_ROM_MT_SIZE 9
static struct {
union mrb_mt_ptr vals[INTEGER_EXT_ROM_MT_SIZE];
mrb_sym keys[INTEGER_EXT_ROM_MT_SIZE];
} integer_ext_rom_data = {
.vals = {
{ .func = int_remainder },
{ .func = int_powm },
{ .func = int_digits },
{ .func = int_size },
{ .func = int_bit_length },
{ .func = int_odd },
{ .func = int_even },
{ .func = int_gcd },
{ .func = int_lcm },
},
.keys = {
MRB_MT_KEY(MRB_SYM(remainder), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(pow), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(digits), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(size), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(bit_length), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM_Q(odd), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM_Q(even), MRB_MT_FUNC|MRB_MT_NOARG|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(gcd), MRB_MT_FUNC|MRB_MT_PUBLIC),
MRB_MT_KEY(MRB_SYM(lcm), MRB_MT_FUNC|MRB_MT_PUBLIC),
}
};
static mrb_mt_tbl integer_ext_rom_mt = {
INTEGER_EXT_ROM_MT_SIZE, INTEGER_EXT_ROM_MT_SIZE,
(union mrb_mt_ptr*)&integer_ext_rom_data, NULL
static mrb_mt_entry integer_ext_rom_entries[] = {
MRB_MT_ENTRY(int_remainder, MRB_SYM(remainder), MRB_MT_FUNC),
MRB_MT_ENTRY(int_powm, MRB_SYM(pow), MRB_MT_FUNC),
MRB_MT_ENTRY(int_digits, MRB_SYM(digits), MRB_MT_FUNC),
MRB_MT_ENTRY(int_size, MRB_SYM(size), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(int_bit_length, MRB_SYM(bit_length), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(int_odd, MRB_SYM_Q(odd), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(int_even, MRB_SYM_Q(even), MRB_MT_FUNC|MRB_MT_NOARG),
MRB_MT_ENTRY(int_gcd, MRB_SYM(gcd), MRB_MT_FUNC),
MRB_MT_ENTRY(int_lcm, MRB_SYM(lcm), MRB_MT_FUNC),
};
static mrb_mt_tbl integer_ext_rom_mt = MRB_MT_ROM_TAB(integer_ext_rom_entries);
void
mrb_mruby_numeric_ext_gem_init(mrb_state* mrb)