Define 'producing'

pull/158/head
Ralf Jung 5 years ago committed by Alexis Beingessner
parent c9db421053
commit 450041032c

@ -21,7 +21,7 @@ language cares about is preventing the following things:
`enum`/`struct`/array/slice/tuple field address
* Reading [uninitialized memory][]
* Breaking the [pointer aliasing rules][]
* Producing/obtaining invalid primitive values:
* Producing invalid primitive values:
* dangling/null/unaligned references
* null `fn` pointers
* a `bool` that isn't 0 or 1
@ -33,6 +33,9 @@ language cares about is preventing the following things:
* Unwinding into another language
* Causing a [data race][race]
"Producing" a value happens any time a value is assigned, passed to a
function/primitive operation or returned from a function/primitive operation.
That's it. That's all the causes of Undefined Behavior baked into Rust. Of
course, unsafe functions and traits are free to declare arbitrary other
constraints that a program must maintain to avoid Undefined Behavior. For

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