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refine macros

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Harald Hoyer 2019-01-09 11:31:49 +01:00
parent ee9bd65af6
commit 7003baaaec
2 changed files with 46 additions and 19 deletions
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2
Cargo.toml
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@ -1,6 +1,6 @@
[package]
name = "chainerror"
version = "0.3.1"
version = "0.3.2"
authors = ["Harald Hoyer <harald@redhat.com>"]
edition = "2018"
license = "MIT/Apache-2.0"

63
src/lib.rs
View file

@ -665,6 +665,9 @@ macro_rules! cherr {
( $k:expr ) => {
ChainError::<_>::new($k, None, Some((line!(), file!())))
};
( None, $k:expr ) => {
ChainError::<_>::new($k, None, Some((line!(), file!())))
};
( $e:expr, $k:expr ) => {
ChainError::<_>::new($k, Some(Box::from($e)), Some((line!(), file!())))
};
@ -759,15 +762,27 @@ fn func1() -> Result<(), Box<Error>> {
**/
#[macro_export]
macro_rules! mstrerr {
( $t:ident, $v:expr $(, $more:expr)* ) => {
|e| cherr!(e, $t (format!($v, $( $more , )* )))
};
( $t:path, $v:expr $(, $more:expr)* ) => {
|e| cherr!(e, $t (format!($v, $( $more , )* )))
};
( $v:expr $(, $more:expr)* ) => {
|e| cherr!(e, format!($v, $( $more , )* ))
};
( $t:ident, $msg:expr ) => ({
|e| cherr!(e, $t ($msg.to_string()))
});
( $t:path, $msg:expr ) => ({
|e| cherr!(e, $t ($msg.to_string()))
});
( $t:ident, $fmt:expr, $($arg:tt)+ ) => ({
|e| cherr!(e, $t (format!($fmt, $($arg)+ )))
});
( $t:path, $fmt:expr, $($arg:tt)+ ) => ({
|e| cherr!(e, $t (format!($fmt, $($arg)+ )))
});
($msg:expr) => ({
|e| cherr!(e, $msg.to_string())
});
($msg:expr, ) => ({
|e| cherr!(e, $msg.to_string())
});
($fmt:expr, $($arg:tt)+) => ({
|e| cherr!(e, format!($fmt, $($arg)+ ))
});
}
/** convenience macro for cherr!(T(format!(…))) where T(String)
@ -807,15 +822,27 @@ fn func1() -> Result<(), Box<Error>> {
**/
#[macro_export]
macro_rules! strerr {
( $t:ident, $v:expr $(, $more:expr)* ) => {
cherr!($t (format!($v, $( $more , )* )))
};
( $t:path, $v:expr $(, $more:expr)* ) => {
cherr!($t (format!($v, $( $more , )* )))
};
( $v:expr $(, $more:expr)* ) => {
cherr!(format!($v, $( $more , )* ))
};
( $t:ident, $msg:expr ) => ({
cherr!($t ($msg.to_string()))
});
( $t:path, $msg:expr ) => ({
cherr!($t ($msg.to_string()))
});
( $t:ident, $fmt:expr, $($arg:tt)+ ) => ({
cherr!($t (format!($fmt, $($arg)+ )))
});
( $t:path, $fmt:expr, $($arg:tt)+ ) => ({
cherr!($t (format!($fmt, $($arg)+ )))
});
($msg:expr) => ({
cherr!($msg.to_string())
});
($msg:expr, ) => ({
cherr!($msg.to_string())
});
($fmt:expr, $($arg:tt)+) => ({
cherr!(format!($fmt, $($arg)+ ))
});
}
/** convenience macro to create a "new type" T(String) and implement Display + Debug for T