ludic/selfhost/support/str.ludic
Orkuncakilkaya 647dfec334 feat(compiler): list literals, typed compound assignment, file:line diagnostics
- `[a, b, c]` list literals (E_LIST → emit_list); static_type learns
  slice-element, `new T`, list, string and literal kinds
- `x op= y` lowers through the same path as `x = x op y` (emit_bin_vals):
  fixed `*=`/`/=` use the Q16.16 64-bit paths, string `+=` concatenates,
  int→long widens; unary `-` keeps a fixed operand's type (arith_ty)
- one `unescape()` table for "strings", 'chars' and `interpolation`;
  `'\''`, `'\\'`, `'\"'` no longer read as 0; unterminated char literals
  and unexpected characters are errors instead of silently skipped
- every diagnostic is `file:line: error: msg` (g_parse_file / g_err_file,
  Node.file + Node.line set by node()); tok_desc() in expectation errors;
  duplicate `function` names and unknown `phase` names are reported in
  source terms (phase_id used to default unknown phases to Overlay)
- interpolation holes skip braces inside string literals
- hand-IR preludes move from the user `@fn_` prefix to `@lp_` so a user
  `is_ws` / `str_eq` / `path_join` no longer collides at link time
- `@ClearColor(expr)` accepts any constant expression; `Os.pid()` added
  (docs page + inventory); `str_starts()` in support/str
- main.ludic: `else if` flag ladder, char literals, stale script comments
- examples/lang/operators.ludic covers all of the above; os.ludic covers
  Os.pid; docs pages for Os.pid and the Overlay phase; ten changesets
- reseeded: selfhost/ludicc.seed.ll is the new compiler's own fixpoint

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-05 01:12:16 +03:00

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# str.ludic — the string handling a compiler lives on: comparison, copying,
# slicing out substrings, and integer<->text. All over raw NUL-terminated
# byte buffers reached with peek8/poke8.
function char_is_digit(c: int) -> bool { return c >= '0' and c <= '9' }
function char_is_alpha(c: int) -> bool {
if c >= 'A' and c <= 'Z' { return true }
if c >= 'a' and c <= 'z' { return true }
return c == '_'
}
function char_is_alnum(c: int) -> bool { return char_is_alpha(c) or char_is_digit(c) }
# does `s` begin with `prefix`? (byte-wise; both NUL-terminated)
function str_starts(s: pointer, prefix: pointer) -> bool {
var i = 0
while prefix[i] != 0 { if s[i] != prefix[i] { return false }; i += 1 }
return true
}
# integer -> fresh decimal string
function itoa(v: int) -> pointer {
if v == 0 { let z = bytes(2); z[0] = '0'; z[1] = 0; return z }
var neg = false
var x = v
if x < 0 { neg = true; x = -x }
let tmp = bytes(16)
var n = 0
while x > 0 { tmp[n] = 48 + x % 10; x /= 10; n += 1 }
var total = n
if neg { total += 1 }
let out = bytes(total + 1)
var k = 0
if neg { out[0] = '-'; k = 1 }
var i = 0
while i < n { out[k + i] = tmp[n - 1 - i]; i += 1 }
out[total] = 0
return out
}