Foundation for the linking-mode work (jolt-5ed). Every var cell carries a :gen
that bumps on bind-root / var-set(root) / alter-var-root — i.e. on redefinition.
Behavior-neutral on its own; it's the substrate the upcoming work needs:
direct-linked (sealed) call sites can detect staleness, and redefinition-aware
dispatch caches can invalidate per-var (only a redefined var's callers miss,
not a global flush). Full suite green, conformance 218/218 in all three modes.
The reader expanded ^X form to (with-meta form X), which evaluated the tag (so
^String errored 'Unable to resolve symbol: String') and, as a param, was no
longer a bare symbol (so the arg bound to nil). Now a keyword/symbol/string hint
on a symbol attaches to the symbol's :meta and the symbol stays bare, so type
hints are transparent in params, lets, and bodies. Map metadata still uses a
runtime with-meta form.
meta now returns a symbol's :meta, and def applies the name's metadata
(^:dynamic, ^:private, ^Type tag, ^{:doc}) to the var, so (meta (var x)) is
consistent. Specs in metadata-spec; grammar note in the ebnf.
README notes regex \p{...} as unsupported (separate from this).
Two changes unlock native Janet speed in compile mode:
- Hot numeric primitives (+ - * < > <= >=) emit as native Janet SYMBOLS rather
than the variadic core fns, so Janet's compiler uses its arithmetic/compare
opcodes. = / not= / quot / rem / mod / division stay as core fns (their
semantics differ from Janet's). Trade-off: the strict non-number checks are
relaxed under compilation (documented perf-mode divergence).
- emit-invoke emits a DIRECT call (f arg...) when the callee is a function
reference (core/local/symbol/fn), instead of wrapping every call in jolt-call.
jolt-call is kept only for keyword/collection literals in call position
((:k m), ({:a 1} :a)) so IFn dispatch still works.
compiled fib(30): 3.4s -> 0.076s (native ceiling), faster than jank's 0.8s.
Updated compiler-test string assertions (core-+ -> +); compile-mode-test gains
native-op + IFn-dispatch cases; README documents compile mode. jpm test green.
Reorganize the flat 49-file test/ into three layers (jpm test recurses, so all
are still discovered):
- test/unit/ white-box component tests (reader, evaluator, types,
persistent-map, lazy-seq, macro, interop, compiler)
- test/integration/ cross-cutting + regression batteries (conformance, jank,
sci-bootstrap/runtime, features, systematic-coverage, api,
core, namespaces, ported clojure suites) and
.../ports/ ported clojure/cljs test batches pending consolidation
- test/spec/ the behavioral contract (built out in following commits)
- test/support/harness.janet shared defspec table runner (cases compared via
Jolt's own =, with a :throws sentinel) + expect= helpers
Files moved with git mv (history preserved) and import paths fixed for depth.
jpm test green. README Test section updated.
Next: build out test/spec/ to cover the public API area-by-area, mining the
integration batteries and filling gaps.
