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Sema: fix PTR of slice of sentinel-terminated array

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Resolves: #20901
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mlugg 2025-02-05 19:53:12 +00:00
parent 0f38558435
commit fbe0ae4fd4
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2 changed files with 18 additions and 2 deletions
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4
src/Sema.zig
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@ -34603,14 +34603,14 @@ fn resolvePeerTypesInner(
} }
// Clear existing sentinel // Clear existing sentinel
ptr_info.sentinel = .none; ptr_info.sentinel = .none;
switch (ip.indexToKey(ptr_info.child)) { if (ptr_info.flags.size == .one) switch (ip.indexToKey(ptr_info.child)) {
.array_type => |array_type| ptr_info.child = (try pt.arrayType(.{ .array_type => |array_type| ptr_info.child = (try pt.arrayType(.{
.len = array_type.len, .len = array_type.len,
.child = array_type.child, .child = array_type.child,
.sentinel = .none, .sentinel = .none,
})).toIntern(), })).toIntern(),
else => {}, else => {},
} };
} }
opt_ptr_info = ptr_info; opt_ptr_info = ptr_info;

16
test/behavior/cast.zig
View File

@ -2649,3 +2649,19 @@ test "bitcast vector" {
const bigsum: u32x8 = @bitCast(zerox32); const bigsum: u32x8 = @bitCast(zerox32);
try std.testing.expectEqual(0, @reduce(.Add, bigsum)); try std.testing.expectEqual(0, @reduce(.Add, bigsum));
} }
test "peer type resolution: slice of sentinel-terminated array" {
var f: bool = undefined;
f = false;
const a: [][2:0]u8 = &.{};
const b: []const [2:0]u8 = &.{.{ 10, 20 }};
const result = if (f) a else b;
comptime assert(@TypeOf(result) == []const [2:0]u8);
try expect(result.len == 1);
try expect(result[0].len == 2);
try expect(result[0][0] == 10);
try expect(result[0][1] == 20);
}