ludic/docs/language/text/text-index_of.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

953 B

id name category kind tokens sig tip order ns member
text-index_of Text.index_of text namespace-method Text.index_of Text.index_of(s, sub) -> int The byte index of a substring, or -1 if absent. 6 Text index_of

Returns the zero-based byte index where sub first appears in s, or -1 if it never does — so Text.index_of("hello world", "world") is 6. Use it to locate a separator before slicing, or as a present-and-where test in one call: guard with if idx >= 0. It reports the first match only.

Parameters:

  • s — the string to search
  • sub — the substring to locate
program KeyValue {
  var pair: string = "hp=42"

  handler Parse phase Update {
    let eq = Text.index_of(pair, "=")            # 2
    let key = Text.slice(pair, 0, eq)            # "hp"
    let value = Text.to_int(Text.slice(pair, eq + 1, Text.length(pair)))
  }
}