Previously, removing a ROM method required flattening all chain layers
into a single mutable table. This was O(n) and allocated RAM for all
previously-ROM methods.
Use a tombstone marker (MT_FUNC flag with func=NULL) instead. The
mt_get() lookup treats this as "not found" and stops the chain walk,
hiding the ROM entry while allowing superclass lookup.
Co-authored-by: Claude <noreply@anthropic.com>
Since disable.h was removed, enable.h was the only remaining
dispatch target from presym.h. Inline its contents into presym.h
and delete the now-redundant enable.h. Also define _2 backward
compatibility macros in terms of the standard macros.
Co-authored-by: Claude <noreply@anthropic.com>
The _2 suffix variants accept an mrb_state* parameter that is
always ignored with presym enabled. Replace all uses in codegen.c,
parse.y, and y.tab.c with the standard macros. The _2 macro
definitions are kept in presym headers for backward compatibility.
Co-authored-by: Claude <noreply@anthropic.com>
Since presym is now always enabled, the @enable_presym flag,
presym_enabled? method, and all conditional branches guarding
presym-specific code paths are dead code. Remove them and
simplify the affected build logic.
Co-authored-by: Claude <noreply@anthropic.com>
Presym is now always enabled. Remove #ifndef MRB_NO_PRESYM
guards and their #else fallback branches from all core files.
Co-authored-by: Claude <noreply@anthropic.com>
Remove disable_presym from mrbc_build and cross-build fallback.
Add explicit object file dependencies on presym headers in
presym.rake to prevent compilation before headers are generated.
Co-authored-by: Claude <noreply@anthropic.com>
Move String's 46 method definitions from runtime
mrb_define_method_id() calls to a static ROM method table
sorted at init time. mrb_mt_init_rom() sorts the parallel
vals/keys arrays by presym ID and sets the readonly flag.
Expose mt_tbl and related types in internal.h so ROM tables
can be defined in individual source files.
When MRB_NO_PRESYM is defined, falls back to traditional
runtime method registration.
Co-authored-by: Claude <noreply@anthropic.com>
Add next pointer and readonly flag to mt_tbl struct to support
chained ROM method table layers. mt_get() walks the chain,
mt_copy() shares ROM layers, mt_free() and mrb_gc_mark_mt() skip
readonly layers. COW in mrb_define_method_raw() creates a mutable
top layer when the existing table is readonly. mt_flatten() merges
all layers for the rare remove_method case.
No ROM tables exist yet -- all tables have next==NULL and no
readonly flag, so behavior is identical to the previous code.
Co-authored-by: Claude <noreply@anthropic.com>
iso.org blocks automated HTTP requests with 403 Forbidden.
Also update the ISO 30170 URLs to current format in README.md
and CONTRIBUTING.md.
Co-authored-by: Claude <noreply@anthropic.com>
Encode 0.0, -0.0, +Inf, -Inf, and NaN as small sentinel constants
with the float tag pattern, avoiding heap allocation for these common
special values. All NaN bit patterns are normalized to a single
canonical NaN. The 5 obscure floats near 2^(-255) whose rotation
encoding would collide with a sentinel are heap-allocated instead.
Co-authored-by: Claude <noreply@anthropic.com>
Replace lossy 2-bit truncation with rotation-based encoding for
64-bit word boxing with float64. The new scheme uses
rotl64(float_bits - ADDEND, 3) to embed floats inline with full
52-bit mantissa precision. Floats with exponents outside [-255,+256]
(0.0, NaN, Inf, very small/large values) fall back to heap-allocated
RFloat.
Co-authored-by: Claude <noreply@anthropic.com>
Add Hash#__pat_values(keys) that returns an array of values if all
keys exist, or false if any key is missing. This replaces per-key
key?() + []() calls (2N hash lookups) with a single method call
(N hash lookups). The compiler generates __pat_values() followed by
array indexing to extract each value for pattern matching.
Co-authored-by: Claude <noreply@anthropic.com>
Extract the keys-to-array loop (load keys + OP_ARRAY) into
gen_pat_keys_ary() helper. The pattern appeared in both
deconstruct_keys argument and __except argument generation.
Co-authored-by: Claude <noreply@anthropic.com>
Yukihiro "Matz" Matsumoto