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runtime: Json.write_file, and Json.encode through a kept buffer

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The encoder appends into RtJsonState's buffer (grown only past the biggest document yet): ints and
Q16.16 fixeds written as digits in place, floats through string() and freed. Json.encode copies the
answer out once; Json.write_file hands the buffer to Fs.write_text (.tmp + rename) and keeps nothing.
json_saves.ludic: exact text, the file equals encode, parse round-trips, 1000 saves grow 0; clean
under MallocScribble. json_quote (the + builder) is gone.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-28 15:32:36 +03:00
parent fc0f3d3790
commit 4499cedcb8
6 changed files with 222 additions and 39 deletions
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tools/ludic-cli/test.ludic
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@ -1081,6 +1081,7 @@ function cmd_dev_test() -> int {
reject_case("rejected/long_into_int", "4294967295 does not fit one; it is a long", "a long literal given to an int is refused, not wrapped")
feat_case("lang/runtime_temps", "", "1 2 3 4 5 grew 0 files grew 0", "runtime_temps.ludic (Log, DateTime.format, Path, Mime, Text, Os and Fs keep nothing a call does not hand back)")
feat_case("lang/string_temps", "", "1 2 3 4 5 6 7 grew 0", "string_temps.ludic (a concatenation's pieces, a template's holes and a compared side are freed once used; a kept one is not)")
feat_case("lang/json_saves", "", "1 2 3 saves grew 0", "json_saves.ludic (Json.write_file saves through a kept buffer: the text Json.encode gives, 1000 saves keep nothing)")
feat_case("lang/nested_templates", "", "outer [inner 3 {x}] \"`}\" end", "nested_templates.ludic (a template literal inside another's hole)")
feat_case("lang/aliases", "", "10 5 3", "aliases.ludic (L6: a namespace method declared as an alias of a function, labelled or by its parameters)")
reject_case("rejected/alias_arity", "this call to Trail.length leaves out to, which has no default", "an alias's arguments are checked against its target")