ocaml.lang.best-practice.string.ocamllint-str-first-chars

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Use instead Str.first_chars

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Defintion

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rules:
  - id: ocamllint-str-first-chars
    pattern: String.sub $S 0 $N
    message: Use instead `Str.first_chars`
    languages:
      - ocaml
    severity: WARNING
    metadata:
      category: best-practice
      technology:
        - ocaml
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]

Examples

string.ml

let test s =
  (* ruleid:ocamllint-str-first-chars *)
  String.sub s 0 20

let test2 s =
  (* ruleid:ocamllint-str-string-after *)
  String.sub s 20 (String.length s - 20)

let test3 s =
  (* ruleid:ocamllint-str-last-chars *)
  String.sub s (String.length s - 20) 20


let test 4 s =
  (* ruleid:ocamllint-useless-sprintf *)
  let s1 = Printf.sprintf "this is useless" in
  (* ruleid:ocamllint-useless-sprintf *)
  let s2 = Printf.sprintf "%s" "this is also useless" in
  let s3 = Printf.sprintf "this is an %d int" 2 in
  ()