Nixyri/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2024-11-14 16:13:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

docs: add documentation on errdefer with caputure syntax

Browse Source 
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
This commit is contained in:
Vincenzo Palazzo 2022-05-17 21:03:42 +02:00
parent 8328f5ed51
commit 80f3c8d276
No known key found for this signature in database
GPG Key ID: 8B6DC2B870B80D5F
1 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
doc/langref.html.in
View File

@ -4831,9 +4831,23 @@ fn deferErrorExample(is_error: bool) !void {
}
}
// The errdefer keyword support also an alternative syntax to capture the
// error generated in case of one error.
//
// This is useful when during the clean up after an error additional
// message want to be printed.
fn deferErrorCaptureExample() !void {
errdefer |err| {
std.debug.print("the error is {s}\n", .{@errorName(err)});
}
return error.DeferError;
}
test "errdefer unwinding" {
deferErrorExample(false) catch {};
deferErrorExample(true) catch {};
deferErrorCaptureExample() catch {};
}
{#code_end#}
{#see_also|Errors#}
@ -11941,7 +11955,7 @@ fn readU32Be() u32 {}
<pre>{#syntax#}errdefer{#endsyntax#}</pre>
</th>
<td>
{#syntax#}errdefer{#endsyntax#} will execute an expression when control flow leaves the current block if the function returns an error.
{#syntax#}errdefer{#endsyntax#} will execute an expression when control flow leaves the current block if the function returns an error, the errdefer expression can capture the unwrapped value.
<ul>
<li>See also {#link|errdefer#}</li>
</ul>