ludic/docs/language/text/text-contains.md
Orkuncakilkaya b7745a4600 refactor(lang): rename the str type (and stringify builtin) to string
Expand the abbreviated string type and its conversion builtin to the full
word everywhere:
  str            ->  string        (the immutable-string type)
  str(x) -> str  ->  string(x) -> string   (the stringify builtin;
                                            what `{…}` interpolation calls)

Types are recognized by identifier, and llty maps both spellings to LLVM
`ptr`, so this is an atomic source rewrite: type annotations, the Ludic
type tags, the builtin name/dispatch, and the interpolation desugar, plus
the grammars, LSP, docs (type-str -> type-string, fn-str -> fn-string), and
inventory. int/bool stay (universally accepted, like Math).

Reseeded; C-free fixpoint holds; all suites green (45/24/29); site + check.py OK.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-30 01:51:11 +03:00

866 B

id name category kind tokens sig tip order ns member
text-contains Text.contains text namespace-method Text.contains Text.contains(s, sub) -> bool Whether a substring appears anywhere in a string. 5 Text contains

Returns true when sub occurs anywhere inside s. An empty substring is always considered present. Use it for a quick membership test — filtering a log line, checking for a forbidden word, or seeing whether a path includes a folder — when you do not need the position. Reach for Text.index_of when you also want where it matched.

Parameters:

  • s — the string to search
  • sub — the substring to look for
program Filter {
  var line: string = "error: disk full"

  handler Scan phase Update {
    if Text.contains(line, "error") {
      # flag it
    }
  }
}