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Sema: implement peer type resolution of function pointers and function bodies

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Closes  #13438
This commit is contained in:
Veikka Tuominen 2022-11-04 17:10:23 +02:00
parent e6b3cb5043
commit 799a558e39
2 changed files with 22 additions and 0 deletions
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12
src/Sema.zig
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@ -28769,6 +28769,13 @@ fn resolvePeerTypes(
}
}
},
.Fn => {
if (!cand_info.mutable and cand_info.pointee_type.zigTypeTag() == .Fn and .ok == try sema.coerceInMemoryAllowedFns(block, chosen_ty, cand_info.pointee_type, target, src, src)) {
chosen = candidate;
chosen_i = candidate_i + 1;
continue;
}
},
else => {},
}
},
@ -28799,6 +28806,11 @@ fn resolvePeerTypes(
.Vector => continue,
else => {},
},
.Fn => if (chosen_ty.isSinglePointer() and chosen_ty.isConstPtr() and chosen_ty.childType().zigTypeTag() == .Fn) {
if (.ok == try sema.coerceInMemoryAllowedFns(block, chosen_ty.childType(), candidate_ty, target, src, src)) {
continue;
}
},
else => {},
}

10
test/behavior/cast.zig
View File

@ -1419,3 +1419,13 @@ test "floatToInt to zero-bit int" {
var a: f32 = 0.0;
comptime try std.testing.expect(@floatToInt(u0, a) == 0);
}
test "peer type resolution of function pointer and function body" {
if (builtin.zig_backend == .stage1) return error.SkipZigTest;
const T = fn () u32;
const a: T = undefined;
const b: *const T = undefined;
try expect(@TypeOf(a, b) == *const fn () u32);
try expect(@TypeOf(b, a) == *const fn () u32);
}