vendor/time/src/error/parse_from_description.rs

   1 //! Error parsing an input into a [`Parsed`](crate::parsing::Parsed) struct
   2
   3 use core::fmt;
   4
   5 use crate::error;
   6
   7 /// An error that occurred while parsing the input into a [`Parsed`](crate::parsing::Parsed) struct.
   8 #[non_exhaustive]
   9 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
  10 pub enum ParseFromDescription {
  11     /// A string literal was not what was expected.
  12     #[non_exhaustive]
  13     InvalidLiteral,
  14     /// A dynamic component was not valid.
  15     InvalidComponent(&'static str),
  16 }
  17
  18 impl fmt::Display for ParseFromDescription {
  19     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
  20         match self {
  21             Self::InvalidLiteral => f.write_str("a character literal was not valid"),
  22             Self::InvalidComponent(name) => {
  23                 write!(f, "the '{name}' component could not be parsed")
  24             }
  25         }
  26     }
  27 }
  28
  29 #[cfg(feature = "std")]
  30 impl std::error::Error for ParseFromDescription {}
  31
  32 impl From<ParseFromDescription> for crate::Error {
  33     fn from(original: ParseFromDescription) -> Self {
  34         Self::ParseFromDescription(original)
  35     }
  36 }
  37
  38 impl TryFrom<crate::Error> for ParseFromDescription {
  39     type Error = error::DifferentVariant;
  40
  41     fn try_from(err: crate::Error) -> Result<Self, Self::Error> {
  42         match err {
  43             crate::Error::ParseFromDescription(err) => Ok(err),
  44             _ => Err(error::DifferentVariant),
  45         }
  46     }
  47 }