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Crypto (#19): add the OS cryptographically-secure random surface (random_bytes/random_hex/random_u32, reading /dev/urandom) and a standard base64 encoder, completing the library alongside the existing SHA-256/ HMAC-SHA256/verify_hmac/hex/ct_equal. All pure integer IR, C-free. Uuid (#16): a new namespace for stable, collision-free IDs — v4 (random) and v7 (time-ordered) generation, plus parse/is_valid/to_text/equals/nil. UUIDs are canonical lowercase 36-char strings; v4 and v7's random tail draw from the crypto CSPRNG, so both carry the documented determinism caveat (mint at the edges, never inside lockstep simulation). Reuses the crypto prelude's fn_secure_bytes / fn_hex_encode. - examples/library/{crypto,uuid}.ludic: known-answer vectors (SHA-256, HMAC, base64 per RFC 4231/4648) and structural invariants (uuid version/variant bits, parse/equals), wired into `x test` (now 51 passed). - docs: per-symbol pages for every new method + a new Uuid section; inventory and impl-vs-docs coverage check pass. - seed regenerated; `x bootstrap-cfree` fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
29 lines
1.2 KiB
Markdown
29 lines
1.2 KiB
Markdown
---
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id: uuid-parse
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name: Uuid.parse
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category: uuid
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kind: namespace-method
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tokens: Uuid.parse
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sig: Uuid.parse(s) -> string
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tip: Normalise an untrusted string to a lowercase UUID, or the nil UUID.
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order: 5
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ns: Uuid
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member: parse
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---
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Normalises an untrusted string: if <code>s</code> is a well-formed UUID it returns the same value in canonical lowercase form; if it is not, it returns the <a href="uuid-nil"><code>nil</code></a> UUID. This never faults on garbage, so it is safe to call on data that arrived from a file, a network peer, or a mod. When you need to *reject* bad input rather than fold it to nil, gate on <a href="uuid-is_valid"><code>Uuid.is_valid</code></a> first.
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Parsing accepts either case and yields the lowercase canonical form, which is what the rest of the library produces — so a parsed ID compares equal (with <code>==</code>) to a freshly generated one of the same value.
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Parameters:
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- `s` — the string to validate and normalise
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```ludic
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program Parse {
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entry {
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let id = Uuid.parse("550E8400-E29B-41D4-A716-446655440000")
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print(id[0..8]) # 550e8400 — lowercased
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if Uuid.parse("nope") == Uuid.nil() { print(1) }
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}
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}
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```
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