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Add the two functions 'getLast' and 'getLastOrNull' to ArrayListAligned/ArrayListAlignedUnmanaged.

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Chris Boesch 2022-12-29 00:24:57 +01:00 committed by Veikka Tuominen
parent 8094fa5d48
commit 1de96a2cc4
1 changed files with 28 additions and 0 deletions
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28
lib/std/array_list.zig
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@ -468,6 +468,20 @@ pub fn ArrayListAligned(comptime T: type, comptime alignment: ?u29) type {
pub fn unusedCapacitySlice(self: Self) Slice { pub fn unusedCapacitySlice(self: Self) Slice {
return self.allocatedSlice()[self.items.len..]; return self.allocatedSlice()[self.items.len..];
} }
/// Return the last element from the list.
/// Asserts the list has at least one item.
pub fn getLast(self: *Self) T {
const val = self.items[self.items.len - 1];
return val;
}
/// Return the last element from the list, or
/// return `null` if list is empty.
pub fn getLastOrNull(self: *Self) ?T {
if (self.items.len == 0) return null;
return self.getLast();
}
}; };
} }
@ -913,6 +927,20 @@ pub fn ArrayListAlignedUnmanaged(comptime T: type, comptime alignment: ?u29) typ
pub fn unusedCapacitySlice(self: Self) Slice { pub fn unusedCapacitySlice(self: Self) Slice {
return self.allocatedSlice()[self.items.len..]; return self.allocatedSlice()[self.items.len..];
} }
/// Return the last element from the list.
/// Asserts the list has at least one item.
pub fn getLast(self: *Self) T {
const val = self.items[self.items.len - 1];
return val;
}
/// Return the last element from the list, or
/// return `null` if list is empty.
pub fn getLastOrNull(self: *Self) ?T {
if (self.items.len == 0) return null;
return self.getLast();
}
}; };
} }