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Sema: allow .ptr on pointer to array

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This commit is contained in:
Veikka Tuominen 2024-03-19 16:14:49 +02:00
parent fda9a32fef
commit 2d443cdabf
2 changed files with 32 additions and 1 deletions
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31
src/Sema.zig
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@ -27256,6 +27256,37 @@ fn fieldPtr(
if (ip.stringEqlSlice(field_name, "len")) {
const int_val = try mod.intValue(Type.usize, inner_ty.arrayLen(mod));
return anonDeclRef(sema, int_val.toIntern());
} else if (ip.stringEqlSlice(field_name, "ptr") and is_pointer_to) {
const ptr_info = object_ty.ptrInfo(mod);
const new_ptr_ty = try sema.ptrType(.{
.child = Type.fromInterned(ptr_info.child).childType(mod).toIntern(),
.sentinel = if (object_ty.sentinel(mod)) |s| s.toIntern() else .none,
.flags = .{
.size = .Many,
.alignment = ptr_info.flags.alignment,
.is_const = ptr_info.flags.is_const,
.is_volatile = ptr_info.flags.is_volatile,
.is_allowzero = ptr_info.flags.is_allowzero,
.address_space = ptr_info.flags.address_space,
.vector_index = ptr_info.flags.vector_index,
},
.packed_offset = ptr_info.packed_offset,
});
const ptr_ptr_info = object_ptr_ty.ptrInfo(mod);
const result_ty = try sema.ptrType(.{
.child = new_ptr_ty.toIntern(),
.sentinel = if (object_ptr_ty.sentinel(mod)) |s| s.toIntern() else .none,
.flags = .{
.alignment = ptr_ptr_info.flags.alignment,
.is_const = ptr_ptr_info.flags.is_const,
.is_volatile = ptr_ptr_info.flags.is_volatile,
.is_allowzero = ptr_ptr_info.flags.is_allowzero,
.address_space = ptr_ptr_info.flags.address_space,
.vector_index = ptr_ptr_info.flags.vector_index,
},
.packed_offset = ptr_ptr_info.packed_offset,
});
return sema.bitCast(block, result_ty, object_ptr, src, null);
} else {
return sema.fail(
block,

2
test/behavior/array.zig
View File

@ -709,7 +709,7 @@ test "pointer to array has ptr field" {
try std.testing.expect(arr.ptr[1] == 20);
try std.testing.expect(arr.ptr[2] == 30);
try std.testing.expect(arr.ptr[3] == 40);
try std.testing.expect(arr.ptr[4] == 50);
try std.testing.expect((&arr.ptr).*[4] == 50);
}
test "discarded array init preserves result location" {