| author |  John Schmidt <john.schmidt.h@gmail.com> 2023-03-08 17:49:52+01:00 |
| committer | John Schmidt <john.schmidt.h@gmail.com> 2023-03-09 00:55:17+01:00 |
| log | 505e720421ce4f7ed11730fe68d32e3bba711f3c |
| tree | 9bb76c6995902416714832b5506218b8b12a8251 |
| parent | 06b263825a67e68cec128c640a6287fa1716dc63 |
sema: add peer type resolution for vectors
This is consistent with how coercion for vectors work. So now you can do
this:
```
var a: @Vector(2, u16) = .{1, 2};
var b: @Vector(2, u8) = .{2, 1};
const c = @min(a, b);
```
where previously you had to cast explicitly:
```
var a: @Vector(2, u16) = .{1, 2};
var b: @Vector(2, u8) = .{2, 1};
var c: @Vector(2, u16) = b;
const c = @min(a, c);
```2 files changed, 44 insertions(+), 0 deletions(-)
src- test
- behavior
src/Sema.zig+25
| ... | ... | @@ -29875,6 +29875,31 @@ fn resolvePeerTypes( |
| 29875 | 29875 | continue; |
| 29876 | 29876 | }, |
| 29877 | 29877 | .Vector => switch (chosen_ty_tag) { |
| 29878 | .Vector => { | |
| 29879 | const chosen_len = chosen_ty.vectorLen(); | |
| 29880 | const candidate_len = candidate_ty.vectorLen(); | |
| 29881 | if (chosen_len != candidate_len) | |
| 29882 | continue; | |
| 29883 | ||
| 29884 | const chosen_child_ty = chosen_ty.childType(); | |
| 29885 | const candidate_child_ty = candidate_ty.childType(); | |
| 29886 | if (chosen_child_ty.zigTypeTag() == .Int and candidate_child_ty.zigTypeTag() == .Int) { | |
| 29887 | const chosen_info = chosen_child_ty.intInfo(target); | |
| 29888 | const candidate_info = candidate_child_ty.intInfo(target); | |
| 29889 | if (chosen_info.bits < candidate_info.bits) { | |
| 29890 | chosen = candidate; | |
| 29891 | chosen_i = candidate_i + 1; | |
| 29892 | } | |
| 29893 | continue; | |
| 29894 | } | |
| 29895 | if (chosen_child_ty.zigTypeTag() == .Float and candidate_child_ty.zigTypeTag() == .Float) { | |
| 29896 | if (chosen_ty.floatBits(target) < candidate_ty.floatBits(target)) { | |
| 29897 | chosen = candidate; | |
| 29898 | chosen_i = candidate_i + 1; | |
| 29899 | } | |
| 29900 | continue; | |
| 29901 | } | |
| 29902 | }, | |
| 29878 | 29903 | .Array => { |
| 29879 | 29904 | chosen = candidate; |
| 29880 | 29905 | chosen_i = candidate_i + 1; |
test/behavior/vector.zig+19
| ... | ... | @@ -175,6 +175,25 @@ test "array to vector" { |
| 175 | 175 | comptime try S.doTheTest(); |
| 176 | 176 | } |
| 177 | 177 | |
| 178 | test "peer type resolution with coercible element types" { | |
| 179 | if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO | |
| 180 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO | |
| 181 | if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO | |
| 182 | if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO | |
| 183 | if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO | |
| 184 | ||
| 185 | const S = struct { | |
| 186 | fn doTheTest() !void { | |
| 187 | var b: @Vector(2, u8) = .{ 1, 2 }; | |
| 188 | var a: @Vector(2, u16) = .{ 2, 1 }; | |
| 189 | var t: bool = true; | |
| 190 | var c = if (t) a else b; | |
| 191 | try std.testing.expect(@TypeOf(c) == @Vector(2, u16)); | |
| 192 | } | |
| 193 | }; | |
| 194 | comptime try S.doTheTest(); | |
| 195 | } | |
| 196 | ||
| 178 | 197 | test "tuple to vector" { |
| 179 | 198 | if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO |
| 180 | 199 | if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO |