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Add a Chain::new constructor

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This commit is contained in:
David Tolnay 2019-11-22 16:34:50 -08:00
parent 2c88164b5b
commit ca2b8b9bb0
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2 changed files with 9 additions and 6 deletions
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8
src/chain.rs
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@ -13,6 +13,14 @@ pub(crate) enum ChainState<'a> {
}, },
} }
impl<'a> Chain<'a> {
pub fn new(head: &'a (dyn StdError + 'static)) -> Self {
Chain {
state: ChainState::Linked { next: Some(head) },
}
}
}
impl<'a> Iterator for Chain<'a> { impl<'a> Iterator for Chain<'a> {
type Item = &'a (dyn StdError + 'static); type Item = &'a (dyn StdError + 'static);

7
src/error.rs
View File

@ -1,5 +1,4 @@
use crate::backtrace::Backtrace; use crate::backtrace::Backtrace;
use crate::chain::ChainState;
use crate::{Chain, Error}; use crate::{Chain, Error};
use std::any::TypeId; use std::any::TypeId;
use std::error::Error as StdError; use std::error::Error as StdError;
@ -722,11 +721,7 @@ impl ErrorImpl<()> {
} }
pub(crate) fn chain(&self) -> Chain { pub(crate) fn chain(&self) -> Chain {
Chain { Chain::new(self.error())
state: ChainState::Linked {
next: Some(self.error()),
},
}
} }
} }