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factor the panic to one spot.

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This commit is contained in:
Lokathor 2020-02-06 19:38:05 -07:00
parent cd8ed37eae
commit fa686336e7
1 changed files with 17 additions and 7 deletions
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24
src/lib.rs
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@ -90,6 +90,16 @@ possibility code branch.
*/ */
/// Immediately panics.
#[cold]
#[inline(never)]
fn something_went_wrong(src: &str, err: PodCastError) -> ! {
// Note(Lokathor): Keeping the panic here makes the panic _formatting_ go
// here too, which helps assembly readability and also helps keep down
// the inline pressure.
panic!("{src}>{err:?}", src = src, err = err)
}
/// Re-interprets `&T` as `&[u8]`. /// Re-interprets `&T` as `&[u8]`.
/// ///
/// Any ZST becomes an empty slice, and in that case the pointer value of that /// Any ZST becomes an empty slice, and in that case the pointer value of that
@ -123,7 +133,7 @@ pub fn bytes_of_mut<T: Pod>(t: &mut T) -> &mut [u8] {
pub fn from_bytes<T: Pod>(s: &[u8]) -> &T { pub fn from_bytes<T: Pod>(s: &[u8]) -> &T {
match try_from_bytes(s) { match try_from_bytes(s) {
Ok(t) => t, Ok(t) => t,
Err(e) => panic!("from_bytes>{:?}", e), Err(e) => something_went_wrong("from_bytes", e),
} }
} }
@ -136,7 +146,7 @@ pub fn from_bytes<T: Pod>(s: &[u8]) -> &T {
pub fn from_bytes_mut<T: Pod>(s: &mut [u8]) -> &mut T { pub fn from_bytes_mut<T: Pod>(s: &mut [u8]) -> &mut T {
match try_from_bytes_mut(s) { match try_from_bytes_mut(s) {
Ok(t) => t, Ok(t) => t,
Err(e) => panic!("from_bytes_mut>{:?}", e), Err(e) => something_went_wrong("from_bytes_mut", e),
} }
} }
@ -211,7 +221,7 @@ pub fn cast<A: Pod, B: Pod>(a: A) -> B {
} else { } else {
match try_cast(a) { match try_cast(a) {
Ok(b) => b, Ok(b) => b,
Err(e) => panic!("cast>{:?}", e), Err(e) => something_went_wrong("cast", e),
} }
} }
} }
@ -232,7 +242,7 @@ pub fn cast_mut<A: Pod, B: Pod>(a: &mut A) -> &mut B {
} else { } else {
match try_cast_mut(a) { match try_cast_mut(a) {
Ok(b) => b, Ok(b) => b,
Err(e) => panic!("cast_mut>{:?}", e), Err(e) => something_went_wrong("cast_mut", e),
} }
} }
} }
@ -253,7 +263,7 @@ pub fn cast_ref<A: Pod, B: Pod>(a: &A) -> &B {
} else { } else {
match try_cast_ref(a) { match try_cast_ref(a) {
Ok(b) => b, Ok(b) => b,
Err(e) => panic!("cast_ref>{:?}", e), Err(e) => something_went_wrong("cast_ref", e),
} }
} }
} }
@ -267,7 +277,7 @@ pub fn cast_ref<A: Pod, B: Pod>(a: &A) -> &B {
pub fn cast_slice<A: Pod, B: Pod>(a: &[A]) -> &[B] { pub fn cast_slice<A: Pod, B: Pod>(a: &[A]) -> &[B] {
match try_cast_slice(a) { match try_cast_slice(a) {
Ok(b) => b, Ok(b) => b,
Err(e) => panic!("cast_slice>{:?}", e), Err(e) => something_went_wrong("cast_slice", e),
} }
} }
@ -280,7 +290,7 @@ pub fn cast_slice<A: Pod, B: Pod>(a: &[A]) -> &[B] {
pub fn cast_slice_mut<A: Pod, B: Pod>(a: &mut [A]) -> &mut [B] { pub fn cast_slice_mut<A: Pod, B: Pod>(a: &mut [A]) -> &mut [B] {
match try_cast_slice_mut(a) { match try_cast_slice_mut(a) {
Ok(b) => b, Ok(b) => b,
Err(e) => panic!("cast_slice_mut>{:?}", e), Err(e) => something_went_wrong("cast_slice_mut", e),
} }
} }