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pprint prints some metadata when *print-meta* bound to true, but not all

Description

Short example illustrating the behavior:

(def f1 '(defn foo [^Integer x] ^{:bar 8} (inc x))) ;; pr shows all metadata, as expected (binding [*print-meta* true] (pr f1)) ;;=> ^{:line 2, :column 10} (defn foo [^Integer x] ^{:bar 8, :line 2, :column 33} (inc x))nil ;; pprint shows some metadata, but not all (binding [*print-meta* true] (clojure.pprint/pprint f1)) ;;=> (defn foo [^Integer x] (inc x))

Cause: pprint overrides collection printing and ignores print-meta, falls back to pr for other things.

Proposed: pprint should print meta on collections when *print-meta* is true.

Patch: clj-1445.patch

Screened by: Ghadi. Does what it purports to do, no reflection introduced.

Environment

None

Attachments

2
  • 22 Oct 2020, 07:37 PM
  • 13 Jun 2014, 06:26 PM

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Alex Miller December 11, 2020 at 7:09 PM

Applied for 1.10.2-rc1

Andy Fingerhut June 13, 2014 at 6:26 PM

Attached file clj-1445-workaround-v2.clj supersedes the earlier one, which I will delete.

The included function pprint-meta appears to be a correct way to pprint values with all metadata, even if the metadata maps themselves have metadata on them.

Andy Fingerhut June 13, 2014 at 5:30 PM

Attached file clj-1445-workaround-v1.clj is a function that pprints with more metadata than clojure.pprint does. As noted in the comments, it may not show metadata on other metadata. Please update with an enhanced version if you create one.

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Created June 13, 2014 at 5:02 PM
Updated December 11, 2020 at 7:09 PM
Resolved December 11, 2020 at 7:09 PM

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