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ParserError: Add cause

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Matthias Beyer 2015-12-04 13:12:17 +01:00
parent 1aaea39b3d
commit 3a76c05317
1 changed files with 14 additions and 1 deletions
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15
src/storage/parser.rs
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@ -10,6 +10,7 @@ pub struct ParserError {
parsertext: String, parsertext: String,
index: i32, index: i32,
explanation: Option<String>, explanation: Option<String>,
caused_by: Option<Box<Error>>,
} }
impl ParserError { impl ParserError {
@ -19,6 +20,7 @@ impl ParserError {
parsertext: text, parsertext: text,
index: idx, index: idx,
explanation: Some(String::from(expl)), explanation: Some(String::from(expl)),
caused_by: None,
} }
} }
@ -27,9 +29,16 @@ impl ParserError {
summary: String::from(sum), summary: String::from(sum),
parsertext: text, parsertext: text,
index: idx, index: idx,
explanation: None explanation: None,
caused_by: None,
} }
} }
pub fn with_cause(mut self, e: Box<Error>) -> ParserError {
self.caused_by = Some(e);
self
}
} }
impl Error for ParserError { impl Error for ParserError {
@ -38,6 +47,10 @@ impl Error for ParserError {
&self.summary[..] &self.summary[..]
} }
fn cause(&self) -> Option<&Error> {
self.caused_by.as_ref().map(|e| &**e)
}
} }
impl Debug for ParserError { impl Debug for ParserError {