src/vendor/serde/src/export.rs

   1 // Copyright 2017 Serde Developers
   2 //
   3 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   4 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   5 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   6 // option. This file may not be copied, modified, or distributed
   7 // except according to those terms.
   8
   9 pub use lib::clone::Clone;
  10 pub use lib::convert::{From, Into};
  11 pub use lib::default::Default;
  12 pub use lib::fmt::{self, Formatter};
  13 pub use lib::marker::PhantomData;
  14 pub use lib::option::Option::{self, None, Some};
  15 pub use lib::result::Result::{self, Err, Ok};
  16
  17 pub use self::string::from_utf8_lossy;
  18
  19 mod string {
  20     use lib::*;
  21
  22     #[cfg(any(feature = "std", feature = "alloc"))]
  23     pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<str> {
  24         String::from_utf8_lossy(bytes)
  25     }
  26
  27     // The generated code calls this like:
  28     //
  29     //     let value = &_serde::export::from_utf8_lossy(bytes);
  30     //     Err(_serde::de::Error::unknown_variant(value, VARIANTS))
  31     //
  32     // so it is okay for the return type to be different from the std case as long
  33     // as the above works.
  34     #[cfg(not(any(feature = "std", feature = "alloc")))]
  35     pub fn from_utf8_lossy(bytes: &[u8]) -> &str {
  36         // Three unicode replacement characters if it fails. They look like a
  37         // white-on-black question mark. The user will recognize it as invalid
  38         // UTF-8.
  39         str::from_utf8(bytes).unwrap_or("\u{fffd}\u{fffd}\u{fffd}")
  40     }
  41 }