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Merge pull request #6239 from pfgithub/patch-1

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Support allocating 0 bit types
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Andrew Kelley 2020-09-06 01:16:33 -04:00 committed by GitHub
commit 32a77a6047
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2 changed files with 5 additions and 1 deletions
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4
lib/std/heap.zig
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@ -915,6 +915,10 @@ pub fn testAllocator(base_allocator: *mem.Allocator) !void {
testing.expect(slice.len == 10);
allocator.free(slice);
const zero_bit_ptr = try allocator.create(u0);
zero_bit_ptr.* = 0;
allocator.destroy(zero_bit_ptr);
}
pub fn testAllocatorAligned(base_allocator: *mem.Allocator, comptime alignment: u29) !void {

2
lib/std/mem/Allocator.zig
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@ -159,7 +159,7 @@ fn moveBytes(
/// Returns a pointer to undefined memory.
/// Call `destroy` with the result to free the memory.
pub fn create(self: *Allocator, comptime T: type) Error!*T {
if (@sizeOf(T) == 0) return &(T{});
if (@sizeOf(T) == 0) return @as(*T, undefined);
const slice = try self.allocAdvancedWithRetAddr(T, null, 1, .exact, @returnAddress());
return &slice[0];
}