ludic/examples/lang/strings.ludic
Orkuncakilkaya fb728bbefe chore(repo): DX cleanup — categorise examples, text-diffable golden, build/ output (#27 #28 #30)
Repository-cleanup / DX pass folding three tracker items into one coherent
change, verified green end to end (`bin/x test` 49/0, `bin/x selfhost-test`
29/0, `bin/x test-tools` 29/0).

#28 — curate & categorise examples/
- 42 flat entries regrouped into intent-revealing subdirs: games/, rendering/,
  ecs/, events/, networking/, lang/, library/ (was lib/).
- chronorift dir-vs-file duplication resolved: the entry file and its import
  modules now live together under games/chronorift(.ludic).
- Every path reference updated repo-wide (test runner, editor-tool drivers,
  docs/site, design docs).
- New examples/README.md indexes the whole set with run commands.
- Showcase examples without a self-asserting entry (hello, events, net_rt) now
  get a compile-only rot guard in `bin/x test`, so nothing here rots silently.

#30 — text-diffable golden baseline
- The 4 binary selfhost/golden/*.ppm blobs are replaced by a single
  selfhost/golden/renders.sha256 manifest (SHA-256 per render). Hashes are
  byte-identical to the old PPMs, so the baseline is unchanged — only its form.
- game_case now compares framebuffer hashes; a regression shows as a changed
  hex line in review, not "binary files differ".
- New `bin/x golden` regenerates the manifest deliberately (review with
  `git diff selfhost/golden/renders.sha256`).

#27 — PPM & asset handling
- Headless renders now write build/out.ppm, never the repo root; `x app`,
  `x clean`, messaging and .gitignore updated to match. Nothing is written to
  the working root any more.
- Redundant local Kenney .zip archives removed (the art ships extracted;
  .gitignore already excludes *.zip). CC0 License.txt files retained.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-30 18:54:21 +03:00

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# strings.ludic — strings are values: compare with ==/!=, join with +, or (best)
# interpolate with `backticks {expr}`. Running it prints: 1 2 3 4 5 6 7
program Strings {
entry {
let greeting = "hello"
if greeting == "hello" { print(1) } # content comparison
if greeting != "world" { print(2) }
let who = "Ludic"
let msg = greeting + ", " + who + "!" # concatenation chains
if msg == "hello, Ludic!" { print(3) }
# build up a string in a loop
var line = ""
var i = 0
while i < 3 { line = line + "ab"; i = i + 1 }
if line == "ababab" { print(4) }
if (greeting + who) != greeting { print(5) }
# interpolation: `{expr}` embeds any expression (numbers become text)
let n = 42
if `{greeting}, {who}!` == "hello, Ludic!" { print(6) }
if `n={n}, next={n + 1}` == "n=42, next=43" { print(7) }
# slicing: s[a..b] is the substring of bytes [a, b), and len(s) its length
let full = "hello world"
if full[0..5] == "hello" { print(8) }
if full[6..len(full)] == "world" { print(9) }
}
}