mirror of
https://github.com/luau-lang/luau.git
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4a2e8013c7
* For autocomplete, additional information is included in Scope for type alias name locations and names of imported modules * Improved autocomplete suggestions in 'for' and 'while' loop headers * String match functions return types are now optional strings and numbers because match is not guaranteed at runtime * Fixed build issue on gcc 11 and up (Fixes https://github.com/Roblox/luau/issues/806)
863 lines
26 KiB
C++
863 lines
26 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/TypeInfer.h"
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#include "Luau/Type.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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TEST_SUITE_BEGIN("IntersectionTypes");
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TEST_CASE_FIXTURE(Fixture, "select_correct_union_fn")
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{
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CheckResult result = check(R"(
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type A = (number) -> (string)
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type B = (string) -> (number)
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local f:A & B
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local b = f(10) -- b is a string
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local c = f("a") -- c is a number
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ(requireType("b"), typeChecker.stringType);
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CHECK_EQ(requireType("c"), typeChecker.numberType);
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}
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TEST_CASE_FIXTURE(Fixture, "table_combines")
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{
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CheckResult result = check(R"(
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type A={a:number}
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type B={b:string}
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local c:A & B = {a=10, b="s"}
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "table_combines_missing")
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{
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CheckResult result = check(R"(
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type A={a:number}
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type B={b:string}
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local c:A & B = {a=10}
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)");
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REQUIRE(result.errors.size() == 1);
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}
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TEST_CASE_FIXTURE(Fixture, "impossible_type")
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{
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CheckResult result = check(R"(
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local c:number&string = 10
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)");
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REQUIRE(result.errors.size() == 1);
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}
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TEST_CASE_FIXTURE(Fixture, "table_extra_ok")
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{
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CheckResult result = check(R"(
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type A={a:number}
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type B={b:string}
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local c:A & B
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local d:A = c
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "fx_intersection_as_argument")
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{
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CheckResult result = check(R"(
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type A = (number) -> (string)
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type B = (string) -> (number)
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type C = (A) -> (number)
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local f:A & B
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local g:C
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local b = g(f)
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "fx_union_as_argument_fails")
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{
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CheckResult result = check(R"(
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type A = (number) -> (string)
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type B = (string) -> (number)
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type C = (A) -> (number)
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local f:A | B
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local g:C
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local b = g(f)
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)");
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REQUIRE(!result.errors.empty());
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}
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TEST_CASE_FIXTURE(Fixture, "argument_is_intersection")
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{
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CheckResult result = check(R"(
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type A = (number | boolean) -> number
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local f: A
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f(5)
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f(true)
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "should_still_pick_an_overload_whose_arguments_are_unions")
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{
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CheckResult result = check(R"(
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type A = (number | boolean) -> number
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type B = (string | nil) -> string
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local f: A & B
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local a1, a2 = f(1), f(true)
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local b1, b2 = f("foo"), f(nil)
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ(*requireType("a1"), *typeChecker.numberType);
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CHECK_EQ(*requireType("a2"), *typeChecker.numberType);
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CHECK_EQ(*requireType("b1"), *typeChecker.stringType);
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CHECK_EQ(*requireType("b2"), *typeChecker.stringType);
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}
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TEST_CASE_FIXTURE(Fixture, "propagates_name")
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{
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const std::string code = R"(
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type A={a:number}
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type B={b:string}
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local c:A&B
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local b = c
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)";
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const std::string expected = R"(
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type A={a:number}
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type B={b:string}
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local c:A&B
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local b:A&B=c
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)";
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CHECK_EQ(expected, decorateWithTypes(code));
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}
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TEST_CASE_FIXTURE(Fixture, "index_on_an_intersection_type_with_property_guaranteed_to_exist")
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{
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CheckResult result = check(R"(
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type A = {x: {y: number}}
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type B = {x: {y: number}}
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local t: A & B
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local r = t.x
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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const IntersectionType* r = get<IntersectionType>(requireType("r"));
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REQUIRE(r);
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TableType* a = getMutable<TableType>(r->parts[0]);
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REQUIRE(a);
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CHECK_EQ(typeChecker.numberType, a->props["y"].type);
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TableType* b = getMutable<TableType>(r->parts[1]);
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REQUIRE(b);
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CHECK_EQ(typeChecker.numberType, b->props["y"].type);
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}
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TEST_CASE_FIXTURE(Fixture, "index_on_an_intersection_type_works_at_arbitrary_depth")
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{
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CheckResult result = check(R"(
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type A = {x: {y: {z: {thing: string}}}}
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type B = {x: {y: {z: {thing: string}}}}
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local t: A & B
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local r = t.x.y.z.thing
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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if (FFlag::DebugLuauDeferredConstraintResolution)
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{
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CHECK_EQ("string", toString(requireType("r")));
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}
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else
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{
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CHECK_EQ("string & string", toString(requireType("r")));
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}
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}
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TEST_CASE_FIXTURE(Fixture, "index_on_an_intersection_type_with_mixed_types")
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{
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CheckResult result = check(R"(
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type A = {x: number}
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type B = {x: string}
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local t: A & B
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local r = t.x
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("number & string", toString(requireType("r")));
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}
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TEST_CASE_FIXTURE(Fixture, "index_on_an_intersection_type_with_one_part_missing_the_property")
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{
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CheckResult result = check(R"(
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type A = {x: number}
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type B = {}
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local t: A & B
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local r = t.x
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("number", toString(requireType("r")));
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}
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TEST_CASE_FIXTURE(Fixture, "index_on_an_intersection_type_with_one_property_of_type_any")
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{
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CheckResult result = check(R"(
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type A = {y: number}
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type B = {x: any}
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local t: A & B
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local r = t.x
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ(*typeChecker.anyType, *requireType("r"));
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}
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TEST_CASE_FIXTURE(Fixture, "index_on_an_intersection_type_with_all_parts_missing_the_property")
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{
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CheckResult result = check(R"(
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type A = {}
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type B = {}
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local function f(t: A & B)
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local x = t.x
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end
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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UnknownProperty* up = get<UnknownProperty>(result.errors[0]);
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REQUIRE_MESSAGE(up, result.errors[0].data);
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CHECK_EQ(up->key, "x");
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}
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TEST_CASE_FIXTURE(Fixture, "table_intersection_write")
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{
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CheckResult result = check(R"(
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type X = { x: number }
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type XY = X & { y: number }
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local a : XY = { x = 1, y = 2 }
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a.x = 10
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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result = check(R"(
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type X = {}
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type XY = X & { x: number, y: number }
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local a : XY = { x = 1, y = 2 }
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a.x = 10
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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result = check(R"(
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type X = { x: number }
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type Y = { y: number }
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type XY = X & Y
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local a : XY = { x = 1, y = 2 }
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a.x = 10
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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result = check(R"(
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type A = { x: {y: number} }
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type B = { x: {y: number} }
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local t : A & B = { x = { y = 1 } }
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t.x = { y = 4 }
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t.x.y = 40
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "table_intersection_write_sealed")
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{
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CheckResult result = check(R"(
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type X = { x: number }
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type Y = { y: number }
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type XY = X & Y
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local a : XY = { x = 1, y = 2 }
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a.z = 10
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), "Cannot add property 'z' to table 'X & Y'");
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}
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TEST_CASE_FIXTURE(Fixture, "table_intersection_write_sealed_indirect")
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{
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CheckResult result = check(R"(
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type X = { x: (number) -> number }
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type Y = { y: (string) -> string }
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type XY = X & Y
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local xy : XY = {
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x = function(a: number) return -a end,
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y = function(a: string) return a .. "b" end
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}
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function xy.z(a:number) return a * 10 end
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function xy:y(a:number) return a * 10 end
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function xy:w(a:number) return a * 10 end
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)");
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LUAU_REQUIRE_ERROR_COUNT(4, result);
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CHECK_EQ(toString(result.errors[0]), R"(Type '(string, number) -> string' could not be converted into '(string) -> string'
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caused by:
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Argument count mismatch. Function expects 2 arguments, but only 1 is specified)");
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CHECK_EQ(toString(result.errors[1]), "Cannot add property 'z' to table 'X & Y'");
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CHECK_EQ(toString(result.errors[2]), "Type 'number' could not be converted into 'string'");
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CHECK_EQ(toString(result.errors[3]), "Cannot add property 'w' to table 'X & Y'");
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}
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TEST_CASE_FIXTURE(Fixture, "table_write_sealed_indirect")
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{
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// After normalization, previous 'table_intersection_write_sealed_indirect' is identical to this one
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CheckResult result = check(R"(
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type XY = { x: (number) -> number, y: (string) -> string }
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local xy : XY = {
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x = function(a: number) return -a end,
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y = function(a: string) return a .. "b" end
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}
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function xy.z(a:number) return a * 10 end
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function xy:y(a:number) return a * 10 end
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function xy:w(a:number) return a * 10 end
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)");
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LUAU_REQUIRE_ERROR_COUNT(4, result);
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CHECK_EQ(toString(result.errors[0]), R"(Type '(string, number) -> string' could not be converted into '(string) -> string'
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caused by:
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Argument count mismatch. Function expects 2 arguments, but only 1 is specified)");
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CHECK_EQ(toString(result.errors[1]), "Cannot add property 'z' to table 'XY'");
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CHECK_EQ(toString(result.errors[2]), "Type 'number' could not be converted into 'string'");
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CHECK_EQ(toString(result.errors[3]), "Cannot add property 'w' to table 'XY'");
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "table_intersection_setmetatable")
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{
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CheckResult result = check(R"(
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local t: {} & {}
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setmetatable(t, {})
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "error_detailed_intersection_part")
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{
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CheckResult result = check(R"(
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type X = { x: number }
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type Y = { y: number }
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type Z = { z: number }
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type XYZ = X & Y & Z
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local a: XYZ = 3
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), R"(Type 'number' could not be converted into 'X & Y & Z'
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caused by:
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Not all intersection parts are compatible. Type 'number' could not be converted into 'X')");
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}
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TEST_CASE_FIXTURE(Fixture, "error_detailed_intersection_all")
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{
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CheckResult result = check(R"(
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type X = { x: number }
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type Y = { y: number }
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type Z = { z: number }
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type XYZ = X & Y & Z
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local a: XYZ
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local b: number = a
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), R"(Type 'X & Y & Z' could not be converted into 'number'; none of the intersection parts are compatible)");
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}
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TEST_CASE_FIXTURE(Fixture, "overload_is_not_a_function")
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{
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check(R"(
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--!nonstrict
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function _(...):((typeof(not _))&(typeof(not _)))&((typeof(not _))&(typeof(not _)))
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_(...)(setfenv,_,not _,"")[_] = nil
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end
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do end
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_(...)(...,setfenv,_):_G()
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)");
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}
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TEST_CASE_FIXTURE(Fixture, "no_stack_overflow_from_flattenintersection")
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{
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CheckResult result = check(R"(
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local l0,l0
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repeat
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type t0 = ((any)|((any)&((any)|((any)&((any)|(any))))))&(t0)
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function _(l0):(t0)&(t0)
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while nil do
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end
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end
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until _(_)(_)._
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)");
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LUAU_REQUIRE_ERRORS(result);
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}
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TEST_CASE_FIXTURE(Fixture, "intersect_bool_and_false")
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{
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CheckResult result = check(R"(
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local x : (boolean & false)
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local y : false = x -- OK
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local z : true = x -- Not OK
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), "Type 'boolean & false' could not be converted into 'true'; none of the intersection parts are compatible");
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}
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TEST_CASE_FIXTURE(Fixture, "intersect_false_and_bool_and_false")
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{
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CheckResult result = check(R"(
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local x : false & (boolean & false)
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local y : false = x -- OK
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local z : true = x -- Not OK
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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// TODO: odd stringification of `false & (boolean & false)`.)
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CHECK_EQ(toString(result.errors[0]),
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"Type 'boolean & false & false' could not be converted into 'true'; none of the intersection parts are compatible");
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}
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TEST_CASE_FIXTURE(Fixture, "intersect_saturate_overloaded_functions")
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{
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CheckResult result = check(R"(
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local x : ((number?) -> number?) & ((string?) -> string?)
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local y : (nil) -> nil = x -- OK
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local z : (number) -> number = x -- Not OK
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), "Type '((number?) -> number?) & ((string?) -> string?)' could not be converted into '(number) -> number'; "
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"none of the intersection parts are compatible");
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}
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TEST_CASE_FIXTURE(Fixture, "union_saturate_overloaded_functions")
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{
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CheckResult result = check(R"(
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local x : ((number) -> number) & ((string) -> string)
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local y : ((number | string) -> (number | string)) = x -- OK
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local z : ((number | boolean) -> (number | boolean)) = x -- Not OK
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), "Type '((number) -> number) & ((string) -> string)' could not be converted into '(boolean | number) -> "
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"boolean | number'; none of the intersection parts are compatible");
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}
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TEST_CASE_FIXTURE(Fixture, "intersection_of_tables")
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{
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CheckResult result = check(R"(
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local x : { p : number?, q : string? } & { p : number?, q : number?, r : number? }
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local y : { p : number?, q : nil, r : number? } = x -- OK
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local z : { p : nil } = x -- Not OK
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)");
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LUAU_REQUIRE_ERROR_COUNT(1, result);
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CHECK_EQ(toString(result.errors[0]), "Type '{| p: number?, q: number?, r: number? |} & {| p: number?, q: string? |}' could not be converted into "
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"'{| p: nil |}'; none of the intersection parts are compatible");
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}
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TEST_CASE_FIXTURE(Fixture, "intersection_of_tables_with_top_properties")
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{
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CheckResult result = check(R"(
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local x : { p : number?, q : any } & { p : unknown, q : string? }
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local y : { p : number?, q : string? } = x -- OK
|
|
local z : { p : string?, q : number? } = x -- Not OK
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '{| p: number?, q: any |} & {| p: unknown, q: string? |}' could not be converted into '{| p: string?, "
|
|
"q: number? |}'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "intersection_of_tables_with_never_properties")
|
|
{
|
|
ScopedFastFlag sffs[]{
|
|
{"LuauUninhabitedSubAnything2", true},
|
|
};
|
|
|
|
CheckResult result = check(R"(
|
|
local x : { p : number?, q : never } & { p : never, q : string? } -- OK
|
|
local y : { p : never, q : never } = x -- OK
|
|
local z : never = x -- OK
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloaded_functions_returning_intersections")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local x : ((number?) -> ({ p : number } & { q : number })) & ((string?) -> ({ p : number } & { r : number }))
|
|
local y : (nil) -> { p : number, q : number, r : number} = x -- OK
|
|
local z : (number?) -> { p : number, q : number, r : number} = x -- Not OK
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]),
|
|
"Type '((number?) -> {| p: number |} & {| q: number |}) & ((string?) -> {| p: number |} & {| r: number |})' could not be converted into "
|
|
"'(number?) -> {| p: number, q: number, r: number |}'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloaded_functions_mentioning_generic")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a>()
|
|
local x : ((number?) -> (a | number)) & ((string?) -> (a | string))
|
|
local y : (nil) -> a = x -- OK
|
|
local z : (number?) -> a = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((number?) -> a | number) & ((string?) -> a | string)' could not be converted into '(number?) -> a'; "
|
|
"none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloaded_functions_mentioning_generics")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a,b,c>()
|
|
local x : ((a?) -> (a | b)) & ((c?) -> (b | c))
|
|
local y : (nil) -> ((a & c) | b) = x -- OK
|
|
local z : (a?) -> ((a & c) | b) = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]),
|
|
"Type '((a?) -> a | b) & ((c?) -> b | c)' could not be converted into '(a?) -> (a & c) | b'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloaded_functions_mentioning_generic_packs")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : ((number?, a...) -> (number?, b...)) & ((string?, a...) -> (string?, b...))
|
|
local y : ((nil, a...) -> (nil, b...)) = x -- OK
|
|
local z : ((nil, b...) -> (nil, a...)) = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((number?, a...) -> (number?, b...)) & ((string?, a...) -> (string?, b...))' could not be converted "
|
|
"into '(nil, b...) -> (nil, a...)'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_unknown_result")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : ((number) -> number) & ((nil) -> unknown)
|
|
local y : (number?) -> unknown = x -- OK
|
|
local z : (number?) -> number? = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((nil) -> unknown) & ((number) -> number)' could not be converted into '(number?) -> number?'; none "
|
|
"of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_unknown_arguments")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : ((number) -> number?) & ((unknown) -> string?)
|
|
local y : (number) -> nil = x -- OK
|
|
local z : (number?) -> nil = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((number) -> number?) & ((unknown) -> string?)' could not be converted into '(number?) -> nil'; none "
|
|
"of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_never_result")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : ((number) -> number) & ((nil) -> never)
|
|
local y : (number?) -> number = x -- OK
|
|
local z : (number?) -> never = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((nil) -> never) & ((number) -> number)' could not be converted into '(number?) -> never'; none of "
|
|
"the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_never_arguments")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : ((number) -> number?) & ((never) -> string?)
|
|
local y : (never) -> nil = x -- OK
|
|
local z : (number?) -> nil = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((never) -> string?) & ((number) -> number?)' could not be converted into '(number?) -> nil'; none "
|
|
"of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_overlapping_results_and_variadics")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local x : ((string?) -> (string | number)) & ((number?) -> ...number)
|
|
local y : ((nil) -> (number, number?)) = x -- OK
|
|
local z : ((string | number) -> (number, number?)) = x -- Not OK
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((number?) -> (...number)) & ((string?) -> number | string)' could not be converted into '(number | "
|
|
"string) -> (number, number?)'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_weird_typepacks_1")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : (() -> a...) & (() -> b...)
|
|
local y : (() -> b...) & (() -> a...) = x -- OK
|
|
local z : () -> () = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]),
|
|
"Type '(() -> (a...)) & (() -> (b...))' could not be converted into '() -> ()'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_weird_typepacks_2")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...,b...>()
|
|
local x : ((a...) -> ()) & ((b...) -> ())
|
|
local y : ((b...) -> ()) & ((a...) -> ()) = x -- OK
|
|
local z : () -> () = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]),
|
|
"Type '((a...) -> ()) & ((b...) -> ())' could not be converted into '() -> ()'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_weird_typepacks_3")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...>()
|
|
local x : (() -> a...) & (() -> (number?,a...))
|
|
local y : (() -> (number?,a...)) & (() -> a...) = x -- OK
|
|
local z : () -> (number) = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]),
|
|
"Type '(() -> (a...)) & (() -> (number?, a...))' could not be converted into '() -> number'; none of the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "overloadeded_functions_with_weird_typepacks_4")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f<a...>()
|
|
local x : ((a...) -> ()) & ((number,a...) -> number)
|
|
local y : ((number,a...) -> number) & ((a...) -> ()) = x -- OK
|
|
local z : (number?) -> () = x -- Not OK
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
CHECK_EQ(toString(result.errors[0]), "Type '((a...) -> ()) & ((number, a...) -> number)' could not be converted into '(number?) -> ()'; none of "
|
|
"the intersection parts are compatible");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "intersect_metatables")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local a : string? = nil
|
|
local b : number? = nil
|
|
|
|
local x = setmetatable({}, { p = 5, q = a });
|
|
local y = setmetatable({}, { q = b, r = "hi" });
|
|
local z = setmetatable({}, { p = 5, q = nil, r = "hi" });
|
|
|
|
type X = typeof(x)
|
|
type Y = typeof(y)
|
|
type Z = typeof(z)
|
|
|
|
local xy : X&Y = z;
|
|
local yx : Y&X = z;
|
|
z = xy;
|
|
z = yx;
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "intersect_metatable_subtypes")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local x = setmetatable({ a = 5 }, { p = 5 });
|
|
local y = setmetatable({ b = "hi" }, { p = 5, q = "hi" });
|
|
local z = setmetatable({ a = 5, b = "hi" }, { p = 5, q = "hi" });
|
|
|
|
type X = typeof(x)
|
|
type Y = typeof(y)
|
|
type Z = typeof(z)
|
|
|
|
local xy : X&Y = z;
|
|
local yx : Y&X = z;
|
|
z = xy;
|
|
z = yx;
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "intersect_metatables_with_properties")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local x = setmetatable({ a = 5 }, { p = 5 });
|
|
local y = setmetatable({ b = "hi" }, { q = "hi" });
|
|
local z = setmetatable({ a = 5, b = "hi" }, { p = 5, q = "hi" });
|
|
|
|
type X = typeof(x)
|
|
type Y = typeof(y)
|
|
type Z = typeof(z)
|
|
|
|
local xy : X&Y = z;
|
|
z = xy;
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "intersect_metatable_with_table")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local x = setmetatable({ a = 5 }, { p = 5 });
|
|
local z = setmetatable({ a = 5, b = "hi" }, { p = 5 });
|
|
|
|
type X = typeof(x)
|
|
type Y = { b : string }
|
|
type Z = typeof(z)
|
|
|
|
-- TODO: once we have shape types, we should be able to initialize these with z
|
|
local xy : X&Y;
|
|
local yx : Y&X;
|
|
z = xy;
|
|
z = yx;
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "CLI-44817")
|
|
{
|
|
CheckResult result = check(R"(
|
|
type X = {x: number}
|
|
type Y = {y: number}
|
|
type Z = {z: number}
|
|
|
|
type XY = {x: number, y: number}
|
|
type XYZ = {x:number, y: number, z: number}
|
|
|
|
local xy: XY = {x = 0, y = 0}
|
|
local xyz: XYZ = {x = 0, y = 0, z = 0}
|
|
|
|
local xNy: X&Y = xy
|
|
local xNyNz: X&Y&Z = xyz
|
|
|
|
local t1: XY = xNy -- Type 'X & Y' could not be converted into 'XY'
|
|
local t2: XY = xNyNz -- Type 'X & Y & Z' could not be converted into 'XY'
|
|
local t3: XYZ = xNyNz -- Type 'X & Y & Z' could not be converted into 'XYZ'
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "less_greedy_unification_with_intersection_types")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
local function f(t): { x: number } & { x: string }
|
|
local x = t.x
|
|
return t
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK_EQ("({| x: number |} & {| x: string |}) -> {| x: number |} & {| x: string |}", toString(requireType("f")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "less_greedy_unification_with_intersection_types_2")
|
|
{
|
|
if (!FFlag::DebugLuauDeferredConstraintResolution)
|
|
return;
|
|
|
|
CheckResult result = check(R"(
|
|
local function f(t: { x: number } & { x: string })
|
|
return t.x
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK_EQ("({| x: number |} & {| x: string |}) -> number & string", toString(requireType("f")));
|
|
}
|
|
|
|
TEST_SUITE_END();
|