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std.ArrayList.unusedCapacitySlice: Return unaligned slice (#20490)

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gooncreeper 2024-07-14 00:56:29 +00:00 committed by GitHub
parent 944c6d40ce
commit ee6a52b40f
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1 changed files with 9 additions and 2 deletions
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lib/std/array_list.zig
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@ -566,7 +566,7 @@ pub fn ArrayListAligned(comptime T: type, comptime alignment: ?u29) type {
/// This can be useful for writing directly into an ArrayList.
/// Note that such an operation must be followed up with a direct
/// modification of `self.items.len`.
pub fn unusedCapacitySlice(self: Self) Slice {
pub fn unusedCapacitySlice(self: Self) []T {
return self.allocatedSlice()[self.items.len..];
}
@ -1193,7 +1193,7 @@ pub fn ArrayListAlignedUnmanaged(comptime T: type, comptime alignment: ?u29) typ
/// This can be useful for writing directly into an ArrayList.
/// Note that such an operation must be followed up with a direct
/// modification of `self.items.len`.
pub fn unusedCapacitySlice(self: Self) Slice {
pub fn unusedCapacitySlice(self: Self) []T {
return self.allocatedSlice()[self.items.len..];
}
@ -2242,3 +2242,10 @@ test "return OutOfMemory when capacity would exceed maximum usize integer value"
try testing.expectError(error.OutOfMemory, list.ensureUnusedCapacity(2));
}
}
test "ArrayListAligned with non-native alignment compiles unusedCapabitySlice" {
var list = ArrayListAligned(u8, 4).init(testing.allocator);
defer list.deinit();
try list.appendNTimes(1, 4);
_ = list.unusedCapacitySlice();
}