mirror of
https://github.com/luau-lang/luau.git
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705 lines
22 KiB
C++
705 lines
22 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#include "Luau/TypeFamily.h"
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#include "Luau/ConstraintSolver.h"
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#include "Luau/NotNull.h"
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#include "Luau/TxnLog.h"
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#include "Luau/Type.h"
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#include "ClassFixture.h"
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#include "Fixture.h"
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#include "doctest.h"
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using namespace Luau;
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LUAU_FASTFLAG(DebugLuauDeferredConstraintResolution)
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struct FamilyFixture : Fixture
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{
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TypeFamily swapFamily;
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FamilyFixture()
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: Fixture(true, false)
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{
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swapFamily = TypeFamily{/* name */ "Swap",
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/* reducer */
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[](TypeId instance, NotNull<TypeFamilyQueue> queue, const std::vector<TypeId>& tys, const std::vector<TypePackId>& tps,
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NotNull<TypeFamilyContext> ctx) -> TypeFamilyReductionResult<TypeId> {
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LUAU_ASSERT(tys.size() == 1);
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TypeId param = follow(tys.at(0));
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if (isString(param))
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{
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return TypeFamilyReductionResult<TypeId>{ctx->builtins->numberType, false, {}, {}};
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}
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else if (isNumber(param))
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{
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return TypeFamilyReductionResult<TypeId>{ctx->builtins->stringType, false, {}, {}};
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}
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else if (is<BlockedType>(param) || is<PendingExpansionType>(param) || is<TypeFamilyInstanceType>(param) ||
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(ctx->solver && ctx->solver->hasUnresolvedConstraints(param)))
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{
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return TypeFamilyReductionResult<TypeId>{std::nullopt, false, {param}, {}};
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}
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else
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{
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return TypeFamilyReductionResult<TypeId>{std::nullopt, true, {}, {}};
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}
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}};
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unfreeze(frontend.globals.globalTypes);
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TypeId t = frontend.globals.globalTypes.addType(GenericType{"T"});
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GenericTypeDefinition genericT{t};
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ScopePtr globalScope = frontend.globals.globalScope;
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globalScope->exportedTypeBindings["Swap"] =
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TypeFun{{genericT}, frontend.globals.globalTypes.addType(TypeFamilyInstanceType{NotNull{&swapFamily}, {t}, {}})};
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freeze(frontend.globals.globalTypes);
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}
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};
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TEST_SUITE_BEGIN("TypeFamilyTests");
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TEST_CASE_FIXTURE(FamilyFixture, "basic_type_family")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type A = Swap<number>
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type B = Swap<string>
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type C = Swap<boolean>
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local x = 123
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local y: Swap<typeof(x)> = "foo"
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK("string" == toString(requireTypeAlias("A")));
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CHECK("number" == toString(requireTypeAlias("B")));
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CHECK("Swap<boolean>" == toString(requireTypeAlias("C")));
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CHECK("string" == toString(requireType("y")));
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CHECK("Type family instance Swap<boolean> is uninhabited" == toString(result.errors[0]));
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};
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TEST_CASE_FIXTURE(FamilyFixture, "family_as_fn_ret")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local swapper: <T>(T) -> Swap<T>
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local a = swapper(123)
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local b = swapper("foo")
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local c = swapper(false)
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK("string" == toString(requireType("a")));
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CHECK("number" == toString(requireType("b")));
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CHECK("Swap<boolean>" == toString(requireType("c")));
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CHECK("Type family instance Swap<boolean> is uninhabited" == toString(result.errors[0]));
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}
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TEST_CASE_FIXTURE(FamilyFixture, "family_as_fn_arg")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local swapper: <T>(Swap<T>) -> T
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local a = swapper(123)
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local b = swapper(false)
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)");
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LUAU_REQUIRE_ERROR_COUNT(2, result);
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// FIXME: Can we constrain these to `never` or `unknown`?
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CHECK("a" == toString(requireType("a")));
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CHECK("a" == toString(requireType("b")));
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CHECK("Type family instance Swap<a> is uninhabited" == toString(result.errors[0]));
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CHECK("Type family instance Swap<a> is uninhabited" == toString(result.errors[1]));
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}
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TEST_CASE_FIXTURE(FamilyFixture, "resolve_deep_families")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local x: Swap<Swap<Swap<string>>>
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK("number" == toString(requireType("x")));
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}
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TEST_CASE_FIXTURE(FamilyFixture, "unsolvable_family")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local impossible: <T>(Swap<T>) -> Swap<Swap<T>>
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local a = impossible(123)
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local b = impossible(true)
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)");
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LUAU_REQUIRE_ERROR_COUNT(2, result);
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for (size_t i = 0; i < 2; ++i)
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{
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CHECK(toString(result.errors[i]) == "Type family instance Swap<a> is uninhabited");
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}
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}
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TEST_CASE_FIXTURE(FamilyFixture, "table_internal_families")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local t: <T>({T}) -> {Swap<T>}
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local a = t({1, 2, 3})
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local b = t({"a", "b", "c"})
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local c = t({true, false, true})
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK(toString(requireType("a")) == "{string}");
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CHECK(toString(requireType("b")) == "{number}");
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CHECK(toString(requireType("c")) == "{Swap<boolean>}");
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CHECK(toString(result.errors[0]) == "Type family instance Swap<boolean> is uninhabited");
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}
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TEST_CASE_FIXTURE(FamilyFixture, "function_internal_families")
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{
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// This test is broken right now, but it's not because of type families. See
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// CLI-71143.
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local f0: <T>(T) -> (() -> T)
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local f: <T>(T) -> (() -> Swap<T>)
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local a = f(1)
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local b = f("a")
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local c = f(true)
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local d = f0(1)
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK(toString(requireType("a")) == "() -> string");
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CHECK(toString(requireType("b")) == "() -> number");
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CHECK(toString(requireType("c")) == "() -> Swap<boolean>");
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CHECK(toString(result.errors[0]) == "Type family instance Swap<boolean> is uninhabited");
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}
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TEST_CASE_FIXTURE(Fixture, "add_family_at_work")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local function add(a, b)
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return a + b
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end
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local a = add(1, 2)
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local b = add(1, "foo")
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local c = add("foo", 1)
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)");
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LUAU_REQUIRE_ERROR_COUNT(2, result);
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CHECK(toString(requireType("a")) == "number");
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CHECK(toString(requireType("b")) == "Add<number, string>");
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CHECK(toString(requireType("c")) == "Add<string, number>");
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CHECK(toString(result.errors[0]) == "Type family instance Add<number, string> is uninhabited");
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CHECK(toString(result.errors[1]) == "Type family instance Add<string, number> is uninhabited");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "cyclic_add_family_at_work")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type T = add<number | T, number>
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK(toString(requireTypeAlias("T")) == "number");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "mul_family_with_union_of_multiplicatives")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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loadDefinition(R"(
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declare class Vec2
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function __mul(self, rhs: number): Vec2
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end
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declare class Vec3
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function __mul(self, rhs: number): Vec3
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end
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)");
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CheckResult result = check(R"(
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type T = mul<Vec2 | Vec3, number>
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK(toString(requireTypeAlias("T")) == "Vec2 | Vec3");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "mul_family_with_union_of_multiplicatives_2")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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loadDefinition(R"(
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declare class Vec3
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function __mul(self, rhs: number): Vec3
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function __mul(self, rhs: Vec3): Vec3
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end
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)");
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CheckResult result = check(R"(
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type T = mul<number | Vec3, Vec3>
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK(toString(requireTypeAlias("T")) == "Vec3");
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}
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TEST_CASE_FIXTURE(Fixture, "internal_families_raise_errors")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local function innerSum(a, b)
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local _ = a + b
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end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK(toString(result.errors[0]) == "Type family instance Add<a, b> depends on generic function parameters but does not appear in the function "
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"signature; this construct cannot be type-checked at this time");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "type_families_can_be_shadowed")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type add<T> = string -- shadow add
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-- this should be ok
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function hi(f: add<unknown>)
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return string.format("hi %s", f)
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end
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-- this should still work totally fine (and use the real type family)
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function plus(a, b)
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return a + b
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK(toString(requireType("hi")) == "(string) -> string");
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CHECK(toString(requireType("plus")) == "<a, b>(a, b) -> add<a, b>");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "type_families_inhabited_with_normalization")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local useGridConfig : any
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local columns = useGridConfig("columns", {}) or 1
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local gutter = useGridConfig('gutter', {}) or 0
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local margin = useGridConfig('margin', {}) or 0
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return function(frameAbsoluteWidth: number)
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local cellAbsoluteWidth = (frameAbsoluteWidth - 2 * margin + gutter) / columns - gutter
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end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_type_family_works")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type MyObject = { x: number, y: number, z: number }
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type KeysOfMyObject = keyof<MyObject>
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local function ok(idx: KeysOfMyObject): "x" | "y" | "z" return idx end
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local function err(idx: KeysOfMyObject): "x" | "y" return idx end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
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REQUIRE(tpm);
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CHECK_EQ("\"x\" | \"y\"", toString(tpm->wantedTp));
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CHECK_EQ("\"x\" | \"y\" | \"z\"", toString(tpm->givenTp));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_type_family_works_with_metatables")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local metatable = { __index = {w = 1} }
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local obj = setmetatable({x = 1, y = 2, z = 3}, metatable)
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type MyObject = typeof(obj)
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type KeysOfMyObject = keyof<MyObject>
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local function ok(idx: KeysOfMyObject): "w" | "x" | "y" | "z" return idx end
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local function err(idx: KeysOfMyObject): "x" | "y" | "z" return idx end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
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REQUIRE(tpm);
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CHECK_EQ("\"x\" | \"y\" | \"z\"", toString(tpm->wantedTp));
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CHECK_EQ("\"w\" | \"x\" | \"y\" | \"z\"", toString(tpm->givenTp));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_type_family_errors_if_it_has_nontable_part")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type MyObject = { x: number, y: number, z: number }
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type KeysOfMyObject = keyof<MyObject | boolean>
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local function err(idx: KeysOfMyObject): "x" | "y" | "z" return idx end
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)");
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// FIXME(CLI-95289): we should actually only report the type family being uninhabited error at its first use, I think?
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LUAU_REQUIRE_ERROR_COUNT(2, result);
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CHECK(toString(result.errors[0]) == "Type family instance keyof<MyObject | boolean> is uninhabited");
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CHECK(toString(result.errors[1]) == "Type family instance keyof<MyObject | boolean> is uninhabited");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_type_family_string_indexer")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type MyObject = { x: number, y: number, z: number }
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type MyOtherObject = { [string]: number }
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type KeysOfMyOtherObject = keyof<MyOtherObject>
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type KeysOfMyObjects = keyof<MyObject | MyOtherObject>
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local function ok(idx: KeysOfMyOtherObject): "z" return idx end
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local function err(idx: KeysOfMyObjects): "z" return idx end
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)");
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LUAU_REQUIRE_ERROR_COUNT(2, result);
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TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
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REQUIRE(tpm);
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CHECK_EQ("\"z\"", toString(tpm->wantedTp));
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CHECK_EQ("string", toString(tpm->givenTp));
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tpm = get<TypePackMismatch>(result.errors[1]);
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REQUIRE(tpm);
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CHECK_EQ("\"z\"", toString(tpm->wantedTp));
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CHECK_EQ("\"x\" | \"y\" | \"z\"", toString(tpm->givenTp));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_type_family_common_subset_if_union_of_differing_tables")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type MyObject = { x: number, y: number, z: number }
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type MyOtherObject = { w: number, y: number, z: number }
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type KeysOfMyObject = keyof<MyObject | MyOtherObject>
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local function err(idx: KeysOfMyObject): "z" return idx end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
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REQUIRE(tpm);
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CHECK_EQ("\"z\"", toString(tpm->wantedTp));
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CHECK_EQ("\"y\" | \"z\"", toString(tpm->givenTp));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_type_family_never_for_empty_table")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type KeyofEmpty = keyof<{}>
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local foo = ((nil :: any) :: KeyofEmpty)
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK(toString(requireType("foo")) == "never");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "rawkeyof_type_family_works")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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type MyObject = { x: number, y: number, z: number }
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type KeysOfMyObject = rawkeyof<MyObject>
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local function ok(idx: KeysOfMyObject): "x" | "y" | "z" return idx end
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local function err(idx: KeysOfMyObject): "x" | "y" return idx end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
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REQUIRE(tpm);
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CHECK_EQ("\"x\" | \"y\"", toString(tpm->wantedTp));
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CHECK_EQ("\"x\" | \"y\" | \"z\"", toString(tpm->givenTp));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "rawkeyof_type_family_ignores_metatables")
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{
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if (!FFlag::DebugLuauDeferredConstraintResolution)
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return;
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CheckResult result = check(R"(
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local metatable = { __index = {w = 1} }
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local obj = setmetatable({x = 1, y = 2, z = 3}, metatable)
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type MyObject = typeof(obj)
|
|
type KeysOfMyObject = rawkeyof<MyObject>
|
|
|
|
local function ok(idx: KeysOfMyObject): "x" | "y" | "z" return idx end
|
|
local function err(idx: KeysOfMyObject): "x" | "y" return idx end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
|
|
TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
|
|
REQUIRE(tpm);
|
|
CHECK_EQ("\"x\" | \"y\"", toString(tpm->wantedTp));
|
|
CHECK_EQ("\"x\" | \"y\" | \"z\"", toString(tpm->givenTp));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "rawkeyof_type_family_errors_if_it_has_nontable_part")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type MyObject = { x: number, y: number, z: number }
|
|
type KeysOfMyObject = rawkeyof<MyObject | boolean>
|
|
|
|
local function err(idx: KeysOfMyObject): "x" | "y" | "z" return idx end
|
|
)");
|
|
|
|
// FIXME(CLI-95289): we should actually only report the type family being uninhabited error at its first use, I think?
|
|
LUAU_REQUIRE_ERROR_COUNT(2, result);
|
|
CHECK(toString(result.errors[0]) == "Type family instance rawkeyof<MyObject | boolean> is uninhabited");
|
|
CHECK(toString(result.errors[1]) == "Type family instance rawkeyof<MyObject | boolean> is uninhabited");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "rawkeyof_type_family_common_subset_if_union_of_differing_tables")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type MyObject = { x: number, y: number, z: number }
|
|
type MyOtherObject = { w: number, y: number, z: number }
|
|
type KeysOfMyObject = rawkeyof<MyObject | MyOtherObject>
|
|
|
|
local function err(idx: KeysOfMyObject): "z" return idx end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
|
|
TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
|
|
REQUIRE(tpm);
|
|
CHECK_EQ("\"z\"", toString(tpm->wantedTp));
|
|
CHECK_EQ("\"y\" | \"z\"", toString(tpm->givenTp));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "rawkeyof_type_family_never_for_empty_table")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type RawkeyofEmpty = rawkeyof<{}>
|
|
|
|
local foo = ((nil :: any) :: RawkeyofEmpty)
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
CHECK(toString(requireType("foo")) == "never");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(ClassFixture, "keyof_type_family_works_on_classes")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type KeysOfMyObject = keyof<BaseClass>
|
|
|
|
local function ok(idx: KeysOfMyObject): "BaseMethod" | "BaseField" | "Touched" return idx end
|
|
local function err(idx: KeysOfMyObject): "BaseMethod" return idx end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
|
|
TypePackMismatch* tpm = get<TypePackMismatch>(result.errors[0]);
|
|
REQUIRE(tpm);
|
|
CHECK_EQ("\"BaseMethod\"", toString(tpm->wantedTp));
|
|
CHECK_EQ("\"BaseField\" | \"BaseMethod\" | \"Touched\"", toString(tpm->givenTp));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(ClassFixture, "keyof_type_family_errors_if_it_has_nonclass_part")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type KeysOfMyObject = keyof<BaseClass | boolean>
|
|
|
|
local function err(idx: KeysOfMyObject): "BaseMethod" | "BaseField" return idx end
|
|
)");
|
|
|
|
// FIXME(CLI-95289): we should actually only report the type family being uninhabited error at its first use, I think?
|
|
LUAU_REQUIRE_ERROR_COUNT(2, result);
|
|
CHECK(toString(result.errors[0]) == "Type family instance keyof<BaseClass | boolean> is uninhabited");
|
|
CHECK(toString(result.errors[1]) == "Type family instance keyof<BaseClass | boolean> is uninhabited");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(ClassFixture, "keyof_type_family_common_subset_if_union_of_differing_classes")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type KeysOfMyObject = keyof<BaseClass | Vector2>
|
|
|
|
local function ok(idx: KeysOfMyObject): never return idx end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(ClassFixture, "binary_type_family_works_with_default_argument")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
type result = mul<number>
|
|
|
|
local function thunk(): result return 5 * 4 end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
CHECK("() -> number" == toString(requireType("thunk")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(ClassFixture, "vector2_multiply_is_overloaded")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
local v = Vector2.New(1, 2)
|
|
|
|
local v2 = v * 1.5
|
|
local v3 = v * v
|
|
local v4 = v * "Hello" -- line 5
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
|
|
CHECK(5 == result.errors[0].location.begin.line);
|
|
CHECK(5 == result.errors[0].location.end.line);
|
|
|
|
CHECK("Vector2" == toString(requireType("v2")));
|
|
CHECK("Vector2" == toString(requireType("v3")));
|
|
CHECK("mul<Vector2, string>" == toString(requireType("v4")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_rfc_example")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
local animals = {
|
|
cat = { speak = function() print "meow" end },
|
|
dog = { speak = function() print "woof woof" end },
|
|
monkey = { speak = function() print "oo oo" end },
|
|
fox = { speak = function() print "gekk gekk" end }
|
|
}
|
|
|
|
type AnimalType = keyof<typeof(animals)>
|
|
|
|
function speakByType(animal: AnimalType)
|
|
animals[animal].speak()
|
|
end
|
|
|
|
speakByType("dog") -- ok
|
|
speakByType("cactus") -- errors
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
|
|
TypeMismatch* tm = get<TypeMismatch>(result.errors[0]);
|
|
REQUIRE(tm);
|
|
CHECK_EQ("\"cat\" | \"dog\" | \"fox\" | \"monkey\"", toString(tm->wantedType));
|
|
CHECK_EQ("\"cactus\"", toString(tm->givenType));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "keyof_oss_crash_gh1161")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
local EnumVariants = {
|
|
["a"] = 1, ["b"] = 2, ["c"] = 3
|
|
}
|
|
|
|
type EnumKey = keyof<typeof(EnumVariants)>
|
|
|
|
function fnA<T>(i: T): keyof<T> end
|
|
|
|
function fnB(i: EnumKey) end
|
|
|
|
local result = fnA(EnumVariants)
|
|
fnB(result)
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK(get<FunctionExitsWithoutReturning>(result.errors[0]));
|
|
}
|
|
|
|
TEST_SUITE_END();
|