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Add a cause() method to EmitError

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For compatibility with error_chain
This commit is contained in:
Marc Addeo 2017-11-12 12:01:39 -05:00
parent bafabb4e41
commit 519e2812e4
1 changed files with 4 additions and 0 deletions
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4
parser/src/emitter.rs
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@ -17,6 +17,10 @@ impl Error for EmitError {
EmitError::BadHashmapKey => "bad hashmap key", EmitError::BadHashmapKey => "bad hashmap key",
} }
} }
fn cause(&self) -> Option<&Error> {
None
}
} }
impl Display for EmitError { impl Display for EmitError {