76 lines
1.7 KiB
Rust
76 lines
1.7 KiB
Rust
use alsa;
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use std;
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use std::convert::From;
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error_chain! {
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foreign_links {
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Alsa(alsa::Error);
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}
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}
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pub trait CHErr {
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type Item;
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fn cherr(self) -> Result<Self::Item>;
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}
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impl<A, E: std::error::Error> CHErr for std::result::Result<A, E>
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where Error: std::convert::From<E>
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{
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type Item = A;
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fn cherr(self) -> Result<Self::Item> {
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return self.map_err(From::from);
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}
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}
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#[macro_export]
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macro_rules! try_w {
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($expr:expr) => {
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try_wr!($expr, ())
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};
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($expr:expr, $fmt:expr, $($arg:tt)+) => {
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try_wr!($expr, (), $fmt, $(arg)+)
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};
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($expr:expr, $fmt:expr) => {
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try_wr!($expr, (), $fmt)
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}
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}
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#[macro_export]
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macro_rules! try_wr {
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($expr:expr, $ret:expr) => (match $expr {
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std::result::Result::Ok(val) => val,
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std::result::Result::Err(err) => {
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warn!("{:?}", err);
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return $ret;
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},
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});
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($expr:expr, $ret:expr, $fmt:expr) => (match $expr {
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std::result::Result::Ok(val) => val,
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std::result::Result::Err(err) => {
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warn!("Original error: {:?}", err);
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warn!($fmt);
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return $ret;
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},
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});
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($expr:expr, $ret:expr, $fmt:expr, $($arg:tt)+) => (match $expr {
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std::result::Result::Ok(val) => val,
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std::result::Result::Err(err) => {
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warn!("Original error: {:?}", err);
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warn!(format!($fmt, $(arg)+));
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return $ret;
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},
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})
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}
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#[macro_export]
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macro_rules! try_r {
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($expr:expr, $ret:expr) => (match $expr {
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std::result::Result::Ok(val) => val,
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std::result::Result::Err(err) => {
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return $ret;
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},
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});
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}
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