vendor/text-size/src/traits.rs

   1 use {crate::TextSize, std::convert::TryInto};
   2
   3 use priv_in_pub::Sealed;
   4 mod priv_in_pub {
   5     pub trait Sealed {}
   6 }
   7
   8 /// Primitives with a textual length that can be passed to [`TextSize::of`].
   9 pub trait TextLen: Copy + Sealed {
  10     /// The textual length of this primitive.
  11     fn text_len(self) -> TextSize;
  12 }
  13
  14 impl Sealed for &'_ str {}
  15 impl TextLen for &'_ str {
  16     #[inline]
  17     fn text_len(self) -> TextSize {
  18         self.len().try_into().unwrap()
  19     }
  20 }
  21
  22 impl Sealed for &'_ String {}
  23 impl TextLen for &'_ String {
  24     #[inline]
  25     fn text_len(self) -> TextSize {
  26         self.as_str().text_len()
  27     }
  28 }
  29
  30 impl Sealed for char {}
  31 impl TextLen for char {
  32     #[inline]
  33     fn text_len(self) -> TextSize {
  34         (self.len_utf8() as u32).into()
  35     }
  36 }