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manual: improve description of unsafe functions.

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Graydon Hoare 2012-10-11 10:41:24 -07:00
parent 9e6df28277
commit bc68a88593
1 changed files with 5 additions and 4 deletions
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doc/rust.md
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@ -943,14 +943,15 @@ of that type.
#### Unsafe functions
Unsafe functions are those containing unsafe operations that are not contained in an [`unsafe` block](#unsafe-blocks).
Such a function must be prefixed with the keyword `unsafe`.
Unsafe operations are those that potentially violate the memory-safety guarantees of Rust's static semantics.
Specifically, the following operations are considered unsafe:
- Dereferencing a [raw pointer](#pointer-types)
- Casting a [raw pointer](#pointer-types) to a safe pointer type
- Breaking the [purity-checking rules](#pure-functions)
- Calling an unsafe function
- Dereferencing a [raw pointer](#pointer-types).
- Casting a [raw pointer](#pointer-types) to a safe pointer type.
- Breaking the [purity-checking rules](#pure-functions) in a `pure` function.
- Calling an unsafe function.
##### Unsafe blocks