luau/tests/TypeInfer.negations.test.cpp
Vighnesh-V 8863bfc950
Sync to upstream/release/686 (#1948)
## General
This week has been spent mostly on fixing bugs in incremental
autocomplete as well as making the new Type Solver more stable.

- Fixes a bug where registered "require" aliases were case-sensitive
instead of case-insensitive.
### New Type Solver
- Adjust literal sub typing logic to account for unreduced type
functions
- Implement a number of subtyping stack utilization improvements
- Emit a single error if an internal type escapes a module's interface
- Checked function errors in the New Non Strict warn about incorrect
argument use with one-indexed positions, e.g. `argument #1 was used
incorrectly` instead of `argument #0 was used incorrectly`.
- Improvements to type function reduction that let us progress further
while reducing
- Augment the generalization system to not emit duplicate constraints.
- Fix a bug where we didn't seal tables in modules that failed to
complete typechecking.

### Fragment Autocomplete
- Provide richer autocomplete suggestions inside of for loops
- Provide richer autocomplete suggestions inside of interpolated string
expressions
- Improve the quality of error messages when typing out interpolated
strings.

### Compiler
- Fixes REX encoding of extended byte registers for the x86 assembly
code generation.
- Fixes for table shape constant data encoding

---
Co-authored-by: Andy Friesen <afriesen@roblox.com>
Co-authored-by: Ariel Weiss <aaronweiss@roblox.com>
Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com>
Co-authored-by: Sora Kanosue <skanosue@roblox.com>
Co-authored-by: Varun Saini <vsaini@roblox.com>
Co-authored-by: Vighnesh Vijay <vvijay@roblox.com>
Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
2025-08-08 10:18:16 -07:00

88 lines
1.9 KiB
C++

// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Fixture.h"
#include "Luau/ToString.h"
#include "doctest.h"
#include "Luau/Common.h"
#include "ScopedFlags.h"
using namespace Luau;
LUAU_FASTFLAG(LuauEagerGeneralization4)
LUAU_FASTFLAG(LuauTrackFreeInteriorTypePacks)
namespace
{
struct NegationFixture : Fixture
{
TypeArena arena;
NegationFixture()
{
registerHiddenTypes(getFrontend());
}
};
} // namespace
TEST_SUITE_BEGIN("Negations");
TEST_CASE_FIXTURE(NegationFixture, "negated_string_is_a_subtype_of_string")
{
CheckResult result = check(R"(
function foo(arg: string) end
local a: string & Not<"Hello">
foo(a)
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_CASE_FIXTURE(NegationFixture, "string_is_not_a_subtype_of_negated_string")
{
CheckResult result = check(R"(
function foo(arg: string & Not<"hello">) end
local a: string
foo(a)
)");
LUAU_REQUIRE_ERROR_COUNT(1, result);
}
TEST_CASE_FIXTURE(Fixture, "cofinite_strings_can_be_compared_for_equality")
{
ScopedFastFlag sff[] = {
{FFlag::LuauEagerGeneralization4, true},
{FFlag::LuauTrackFreeInteriorTypePacks, true}
};
CheckResult result = check(R"(
function f(e)
if e == 'strictEqual' then
e = 'strictEqualObject'
end
if e == 'deepStrictEqual' or e == 'strictEqual' then
elseif e == 'notDeepStrictEqual' or e == 'notStrictEqual' then
end
return e
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
CHECK("(string) -> string" == toString(requireType("f")));
}
TEST_CASE_FIXTURE(NegationFixture, "compare_cofinite_strings")
{
CheckResult result = check(R"(
local u : Not<"a">
local v : "b"
if u == v then
end
)");
LUAU_REQUIRE_NO_ERRORS(result);
}
TEST_SUITE_END();