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add failAllocator to enable some regression tests

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This commit is contained in:
Jonathan Marler 2020-05-06 23:56:48 -06:00
parent 0c7397b49f
commit 0a76e11617
1 changed files with 16 additions and 0 deletions
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16
lib/std/mem.zig
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@ -281,6 +281,22 @@ pub const Allocator = struct {
}
};
var failAllocator = Allocator {
.reallocFn = failAllocatorRealloc,
.shrinkFn = failAllocatorShrink,
};
fn failAllocatorRealloc(self: *Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) ![]u8 {
return error.OutOfMemory;
}
fn failAllocatorShrink(self: *Allocator, old_mem: []u8, old_align: u29, new_size: usize, new_align: u29) []u8 {
@panic("failAllocatorShrink should never be called because it cannot allocate");
}
test "mem.Allocator basics" {
testing.expectError(error.OutOfMemory, failAllocator.alloc(u8, 1));
testing.expectError(error.OutOfMemory, failAllocator.allocSentinel(u8, 1, 0));
}
/// Copy all of source into dest at position 0.
/// dest.len must be >= source.len.
/// dest.ptr must be <= src.ptr.