rust
/
nomicon
mirror of https://github.com/rust-lang/nomicon
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix via mdinger

Browse Source
pull/10/head
Alexis Beingessner 10 years ago committed by Manish Goregaokar
parent c2e44a36f3
commit b6cf288741
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File

2
repr-rust.md
Unescape View File

@ -109,7 +109,7 @@ struct FooRepr {
And indeed this is approximately how it would be laid out in general And indeed this is approximately how it would be laid out in general
(modulo the size and position of `tag`). However there are several cases where (modulo the size and position of `tag`). However there are several cases where
such a representation is ineffiecient. The classic case of this is Rust's such a representation is inefficient. The classic case of this is Rust's
"null pointer optimization". Given a pointer that is known to not be null "null pointer optimization". Given a pointer that is known to not be null
(e.g. `&u32`), an enum can *store* a discriminant bit *inside* the pointer (e.g. `&u32`), an enum can *store* a discriminant bit *inside* the pointer
by using null as a special value. The net result is that by using null as a special value. The net result is that

Write Preview
Loading…
Cancel
Save