src/error.rs


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use std::result::Result as StdResult;

use fluent::FluentResource;

pub type Result<T> = StdResult<T, Error>;

/// Simple wrapper around the errors that may occur during the program's execution.
#[derive(Debug)]
pub enum Error {
   /// A generic error - you are not supposed to ever actually encounter this, but it beats
   /// using a wild unwrap in a library.
   GenericError(String),
   /// Wraps a [`std::io::Errror`] that occurred while reading the files.
   IoError(std::io::Error),
   /// Wraps a [`unic_langid::LanguageIdentifierError`] that occurred while parsing a language
   /// identifier.
   LanguageIdentifierError(unic_langid::LanguageIdentifierError),
   /// Wraps any number of [`fluent::FluentError`] that have occurred while parsing.
   FluentError(Vec<fluent::FluentError>),
   /// Happens when you try to get a message that does not actually exist.
   MissingMessageError(String)
}

impl From<std::io::Error> for Error {
   fn from(err: std::io::Error) -> Self {
      Self::IoError(err)
   }
}

impl From<(FluentResource, Vec<fluent_syntax::parser::ParserError>)> for Error {
   fn from(err: (FluentResource, Vec<fluent_syntax::parser::ParserError>)) -> Self {
      let err = err.1.iter().map(|e| fluent::FluentError::ParserError(e.clone())).collect();
      Self::FluentError(err)
   }
}

impl From<Vec<fluent::FluentError>> for Error {
   fn from(err: Vec<fluent::FluentError>) -> Self {
      Self::FluentError(err)
   }
}

impl From<unic_langid::LanguageIdentifierError> for Error {
   fn from(err: unic_langid::LanguageIdentifierError) -> Self {
      Self::LanguageIdentifierError(err)
   }
}