Nixyri/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2024-11-16 09:03:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

std: Handle empty MultiArrayList in items()

Browse Source 
Closes #8211
This commit is contained in:
LemonBoy 2021-03-11 23:05:46 +01:00 committed by Isaac Freund
parent 4fc6f631e0
commit 482424e2b1
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
lib/std/multi_array_list.zig
View File

@ -28,8 +28,11 @@ pub fn MultiArrayList(comptime S: type) type {
capacity: usize,
pub fn items(self: Slice, comptime field: Field) []FieldType(field) {
const byte_ptr = self.ptrs[@enumToInt(field)];
const F = FieldType(field);
if (self.len == 0) {
return &[_]F{};
}
const byte_ptr = self.ptrs[@enumToInt(field)];
const casted_ptr = @ptrCast([*]F, @alignCast(@alignOf(F), byte_ptr));
return casted_ptr[0..self.len];
}
@ -300,6 +303,8 @@ test "basic usage" {
var list = MultiArrayList(Foo){};
defer list.deinit(ally);
testing.expectEqual(@as(usize, 0), list.items(.a).len);
try list.ensureCapacity(ally, 2);
list.appendAssumeCapacity(.{