simon/jolt
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Chez Phase 2 (inc L): var def-time metadata (jolt-zikh)

Browse source 
Capture a def's reader metadata on the Chez var. The :def emit now lowers a def
with non-empty metadata to def-var-with-meta!, which stores the user meta
(^:private / ^Type tag / docstring -> {:doc}) in an eq side-table keyed by the
var-cell. jolt-meta of a var-cell merges that onto {:ns :name} derived from the
cell, so every var reports {:ns :name} like Clojure with the def-time meta
layered on. (^{:map} metadata on a def name stays uncompilable for the compiler
generally — analyzer rejects it, the Janet back end punts to its interpreter,
which Chez lacks — so it's out of subset, not a meta-capture gap.)

Added natives-meta.ss to the prelude-cache fingerprint. Prelude parity
1969 -> 1972, 0 new divergences; the three var-metadata allowlist entries
(^:private / ^Type tag / docstring) dropped. New focused gate
test/chez/_var_meta.janet.
This commit is contained in:
Yogthos 2026-06-18 17:13:46 -04:00
parent 32e2d8bd58
commit 737288bff5
6 changed files with 87 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

45
test/chez/_var_meta.janet Normal file
View file

@ -0,0 +1,45 @@
# jolt-zikh — var def-time metadata capture (^:private / ^Type tag / docstring).
# (meta (var v)) must carry the def-time reader metadata + :ns/:name, matching the
# JVM-canonical build/jolt. TDD harness: bin/jolt-chez -e per case, last line ==
# expected.
#
# janet test/chez/_var_meta.janet
(def jolt-bin (or (os/getenv "JOLT_BIN") "bin/jolt-chez"))
(def cases
# NOTE: ^{:map} metadata on a def name (e.g. (def ^{:doc "hi"} dv 1)) reads as
# (def (with-meta name m) v) and is uncompilable for the COMPILER generally
# (analyzer.clj rejects it; the Janet back end punts to its interpreter, which
# Chez lacks) — out of subset, not a meta-capture gap. Shorthand ^:kw / ^Type
# and the docstring form keep the name a plain symbol, so they're in scope.
[["^:private on var" "(do (def ^:private pv 1) (:private (meta (var pv))))" "true"]
["^Type tag on var" "(do (def ^String tv \"a\") (:tag (meta (var tv))))" "String"]
["(def name doc val)" "(do (def dv2 \"hi\" 1) (:doc (meta (var dv2))))" "hi"]
["meta carries :name" "(do (def mv 1) (:name (meta (var mv))))" "mv"]
["meta carries :ns" "(do (def nv 1) (:ns (meta (var nv))))" "user"]
["plain def: no user meta" "(do (def pl 1) (nil? (:private (meta (var pl)))))" "true"]])
(defn run-capture [expr]
(def proc (os/spawn [jolt-bin "-e" expr] :p {:out :pipe :err :pipe}))
(def out (ev/read (proc :out) 0x100000))
(def err (ev/read (proc :err) 0x100000))
(def code (os/proc-wait proc))
(def lines (filter (fn [l] (not (empty? l)))
(string/split "\n" (string/trim (if out (string out) "")))))
[code (if (empty? lines) "" (last lines)) (if err (string err) "")])
(var pass 0)
(def fails @[])
(each [label expr expected] cases
(def [code got err] (run-capture expr))
(cond
(not= code 0) (array/push fails [label (string "exit " code "; err: " (string/trim err))])
(= got expected) (++ pass)
(array/push fails [label (string "want `" expected "`, got `" got "`")])))
(printf "\n_var_meta parity [%s]: %d/%d passed" jolt-bin pass (length cases))
(when (> (length fails) 0)
(printf "%d FAIL(s):" (length fails))
(each [l m] fails (printf " FAIL [%s] %s" l m)))
(flush)
(os/exit (if (empty? fails) 0 1))