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Nicer error messages

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This commit is contained in:
Josh Mitchell
2020-11-07 23:45:14 +11:00
parent 4ca96364b9
commit 18436aaaa3
1 changed files with 30 additions and 16 deletions
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46
src/errors.rs
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@@ -86,41 +86,47 @@ impl From<std::ffi::NulError> for Error {
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
use ErrorTask::*;
match &self.task {
OpenFile(path, mode) => write!(
match (&self.task, &self.code) {
(OpenFile(path, mode), _) => write!(
f,
"Failed to open file at {path:?} with mode {mode:?}",
path = path,
mode = mode
),
ReadNumAtoms => write!(
(ReadNumAtoms, Some(code)) => write!(
f,
"Failed to read atom number from trajectory: C API returned error code {:?}",
self.code
"Failed to read atom number from trajectory: C API returned error code {}",
code
),
Read => write!(
(ReadNumAtoms, None) => write!(f, "Failed to read atom number from trajectory"),
(Read, Some(code)) => write!(
f,
"Failed to read trajectory: C API returned error code {:?}",
self.code
"Failed to read trajectory: C API returned error code {}",
code
),
Write => write!(
(Read, None) => write!(f, "Failed to read trajectory"),
(Write, Some(code)) => write!(
f,
"Failed to write trajectory: C API returned error code {:?}",
self.code
"Failed to write trajectory: C API returned error code {}",
code
),
Flush => write!(
(Write, None) => write!(f, "Failed to write trajectory"),
(Flush, Some(code)) => write!(
f,
"Failed to flush trajectory: C API returned error code {:?}",
self.code
"Failed to flush trajectory: C API returned error code {}",
code
),
ToCString(_) => write!(
(ToCString(_), _) => write!(
f,
"Path cannot be converted to a C string because it has a null byte"
),
(Flush, None) => write!(f, "Failed to flush trajectory"),
}
}
}
impl std::error::Error for Error {}
#[derive(Debug, Clone, PartialEq)]
pub enum ErrorCode {
ExdrOk,
@@ -171,7 +177,15 @@ impl From<c_abi::xdrfile::BindgenTy1> for ErrorCode {
}
}
impl std::error::Error for Error {}
impl std::fmt::Display for ErrorCode {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if let Self::UnmatchedCode(i) = self {
write!(f, "{}", i)
} else {
write!(f, "{:?}", self)
}
}
}
pub type Result<T, E = Error> = std::result::Result<T, E>;