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simplify static assert #16764

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merged 2 commits into from
Aug 5, 2024
Merged

simplify static assert #16764

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32229a4
simplify static assert
0-v-0 Aug 2, 2024
54d7cae
fix error
0-v-0 Aug 2, 2024
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3 changes: 2 additions & 1 deletion druntime/src/core/stdcpp/allocator.d
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Original file line number Diff line number Diff line change
Expand Up @@ -299,9 +299,10 @@ version (CppRuntime_Microsoft)
{
enum size_t _Big_allocation_threshold = 4096;
enum size_t _Big_allocation_alignment = 32;
enum isPowerOf2(size_t v) = v && !(v & (v - 1));

static assert(2 * (void*).sizeof <= _Big_allocation_alignment, "Big allocation alignment should at least match vector register alignment");
static assert((v => v != 0 && (v & (v - 1)) == 0)(_Big_allocation_alignment), "Big allocation alignment must be a power of two");
static assert(isPowerOf2!_Big_allocation_alignment, "Big allocation alignment must be a power of two");
static assert(size_t.sizeof == (void*).sizeof, "uintptr_t is not the same size as size_t");

// NOTE: this must track `_DEBUG` macro used in C++...
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