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a standard library in Finch: path, time, proc, json

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import json   import path   import time   import proc  -- found in std/ after the program's own files,
so a program's own json.fch always wins.

path: join, base, dir, ext, stem, parts, clean, is_abs.
time: now, millis, sleep, date, local, format, days_in_month (clock_gettime, strftime through C import).
proc: run, output (an error with the command's output when it fails), env, pid, cwd.
json: parse (errors with line and column), stringify, pretty, new_*, get/at/set/push/has/names and
str_or/int_or/float_or/bool_or; \u escapes with surrogate pairs.

The C importer now leaves a plain (non-const) char * parameter a ptr[char], a buffer C writes into;
only const char * is text going in. str(ptr) and str([]u8) are in the self-hosted compiler.

boot.sh: 40 passed, 0 failed.
This commit is contained in:
Nexoniarz 2026-10-25 20:58:26 +01:00
commit ea6d2a57e5
13 changed files with 929 additions and 9 deletions
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35
tests/new/std_json.fch Normal file
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import json
fn main() -> ! {
doc := try json.parse("{\"name\": \"Finch\", \"tags\": [\"fast\", \"small\"], \"stars\": 5, \"pi\": 3.25, \"ok\": true, \"none\": null, \"nested\": {\"deep\": [1, [2, 3]]}}")
print(doc.get("name").str_or(""), doc.get("tags").at(1).str_or(""), doc.get("stars").int_or(0), doc.get("pi").float_or(0.0))
print(doc.get("ok").bool_or(false), doc.get("none").is_null(), doc.get("missing").is_null(), doc.has("name"), doc.has("nope"))
print(doc.get("nested").get("deep").at(1).at(0).int_or(-1), doc.get("tags").len(), doc.names())
print(json.stringify(doc))
out := json.new_object()
out.set("greeting", json.new_text("hi \"there\"\n"))
list := json.new_list()
list.push(json.new_number(1))
list.push(json.new_number(2.5))
list.push(json.new_bool(false))
list.push(json.new_null())
out.set("values", list)
out.set("greeting", json.new_text("replaced"))
out.set("empty", json.new_object())
print(json.stringify(out))
print(json.pretty(out))
again := try json.parse(json.pretty(out))
print(json.stringify(again) == json.stringify(out))
print((try json.parse("\"caf\\u00e9 \\ud83d\\ude00 \\/\"")).str_or(""))
print((try json.parse(" [ ] ")).len(), (try json.parse("-12.5e1")).float_or(0.0))
for bad in ["{\"a\": }", "[1, 2", "{\"a\" 1}", "tru", "[1] x", "\"open", "", "[1,\n oops]"] {
json.parse(bad) or {
print(err)
continue
}
print("parsed?!", bad)
}
}