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doc: recommend optional pointers for nullptrs instead of allowzero

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Shritesh Bhattarai 2019-05-30 19:38:26 -07:00 committed by Andrew Kelley
parent 0ccd91faea
commit 6d73e5de05
1 changed files with 3 additions and 3 deletions
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doc/langref.html.in
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@ -2026,9 +2026,9 @@ fn foo(bytes: []u8) u32 {
{#header_open|allowzero#}
<p>
This pointer attribute allows a pointer to have address zero. This is only ever needed on the
freestanding OS target, where the address zero is mappable. In this code example, if the pointer
did not have the {#syntax#}allowzero{#endsyntax#} attribute, this would be a
{#link|Pointer Cast Invalid Null#} panic:
freestanding OS target, where the address zero is mappable. If you want to represent null pointers, use
{#link|Optional Pointers#} instead. In this code example, if the pointer did not have the
{#syntax#}allowzero{#endsyntax#} attribute, this would be a {#link|Pointer Cast Invalid Null#} panic:
</p>
{#code_begin|test|allowzero#}
const std = @import("std");