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extern crate redis;
use std::error;
use std::fmt;
#[derive(Debug)]
pub enum ErrorInfo {
RedisError(redis::RedisError),
Description(&'static str),
TimeoutError(&'static str)
}
#[derive(Debug)]
pub struct RedisError {
pub info: ErrorInfo
}
impl error::Error for RedisError {
fn description(&self) -> &str {
match self.info {
ErrorInfo::RedisError(ref cause) => cause.description(),
ErrorInfo::Description(description) => description,
ErrorInfo::TimeoutError(description) => description,
}
}
fn cause(&self) -> Option<&error::Error> {
match self.info {
ErrorInfo::RedisError(ref cause) => Some(cause as &error::Error),
_ => None,
}
}
}
impl fmt::Display for RedisError {
fn fmt(
&self,
format: &mut fmt::Formatter,
) -> Result<(), fmt::Error> {
match self.info {
ErrorInfo::RedisError(ref cause) => cause.fmt(format),
ErrorInfo::Description(description) => description.fmt(format),
ErrorInfo::TimeoutError(description) => description.fmt(format),
}
}
}
pub trait RedisArg: Sized + ToString {}
macro_rules! as_redis_arg {
($t:ty) => (
impl RedisArg for $t {}
)
}
impl<'a> RedisArg for &'a str {}
as_redis_arg!(i8);
as_redis_arg!(i16);
as_redis_arg!(u16);
as_redis_arg!(i32);
as_redis_arg!(u32);
as_redis_arg!(i64);
as_redis_arg!(u64);
as_redis_arg!(f32);
as_redis_arg!(f64);
as_redis_arg!(isize);
as_redis_arg!(usize);
as_redis_arg!(bool);
pub type Message = redis::Msg;
pub type RedisResult<T> = Result<T, RedisError>;
pub type RedisEmptyResult = RedisResult<()>;
pub type RedisMessageResult = RedisResult<Message>;
pub type RedisStringResult = RedisResult<String>;
pub type RedisBoolResult = RedisResult<bool>;