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Update const eval chapter to latest changes #842

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merged 5 commits into from
Jul 12, 2020
Merged

Update const eval chapter to latest changes #842

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31f087e
Update const eval chapter to latest changes
oli-obk Jun 30, 2020
7cc2ee2
Address review comments
oli-obk Jul 1, 2020
167d751
Explain differences between const functions and const contexts
oli-obk Jul 1, 2020
8acf907
Some more precise explanations of which features are allowed in const…
oli-obk Jul 12, 2020
e9d9b2e
Link to transmute and make it its own point
oli-obk Jul 12, 2020
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12 changes: 9 additions & 3 deletions src/const_eval.md
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Original file line number Diff line number Diff line change
Expand Up @@ -27,9 +27,7 @@ to be run.
* [Struct] expressions.
* [Enum variant] expressions.
* [Block expressions], including `unsafe` blocks.
* [let statements] and thus irrefutable [patterns], with the caveat that until `if` and `match`
are implemented, one cannot use both short circuiting operators (`&&` and `||`) and let
statements within the same constant.
* [let statements] and thus irrefutable [patterns], including mutable bindings
* [assignment expressions]
* [compound assignment expressions]
* [expression statements]
Expand All @@ -45,6 +43,8 @@ to be run.
* [Cast] expressions, except pointer to address and
function pointer to address casts.
* Calls of [const functions] and const methods.
* [loop], [while] and `while let` expressions.
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* [if], [`if let`] and [match] expressions.

## Const context

Expand Down Expand Up @@ -81,10 +81,14 @@ A _const context_ is one of the following:
[functions]: items/functions.md
[grouped]: expressions/grouped-expr.md
[interior mutability]: interior-mutability.md
[if]: expressions/if-expr.md#if-expressions
[`if let`]: expressions/if-expr.md#if-let-expressions
[lazy boolean]: expressions/operator-expr.md#lazy-boolean-operators
[let statements]: statements.md#let-statements
[literals]: expressions/literal-expr.md
[logical]: expressions/operator-expr.md#arithmetic-and-logical-binary-operators
[loop]: expressions/loop-expr.md#infinite-loops
[match]: expressions/match-expr.md
[negation]: expressions/operator-expr.md#negation-operators
[overflow]: expressions/operator-expr.md#overflow
[paths]: expressions/path-expr.md
Expand All @@ -94,3 +98,5 @@ A _const context_ is one of the following:
[statics]: items/static-items.md
[struct]: expressions/struct-expr.md
[tuple expressions]: expressions/tuple-expr.md
[while]: expressions/loop-expr.md#predicate-loops
[`while let`]: expressions/loop-expr.md#predicate-pattern-loops