mirror of
https://github.com/luau-lang/luau.git
synced 2024-12-12 21:10:37 +00:00
fd6250cf9d
### What's Changed - Improve readability of unions and intersections by limiting the number of elements of those types that can be presented on a single line (gated under `FFlag::LuauToStringSimpleCompositeTypesSingleLine`) - Adds a new option to the compiler `--record-stats` to record and output compilation statistics - `if...then...else` expressions are now optimized into `AND/OR` form when possible. ### VM - Add a new `buffer` type to Luau based on the [buffer RFC](https://github.com/Roblox/luau/pull/739) and additional C API functions to work with it; this release does not include the library. - Internal C API to work with string buffers has been updated to align with Lua version more closely ### Native Codegen - Added support for new X64 instruction (rev) and new A64 instruction (bswap) in the assembler - Simplified the way numerical loop condition is translated to IR ### New Type Solver - Operator inference now handled by type families - Created a new system called `Type Paths` to explain why subtyping tests fail in order to improve the quality of error messages. - Systematic changes to implement Data Flow analysis in the new solver (`Breadcrumb` removed and replaced with `RefinementKey`) --- Co-authored-by: Aaron Weiss <aaronweiss@roblox.com> Co-authored-by: Alexander McCord <amccord@roblox.com> Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Aviral Goel <agoel@roblox.com> Co-authored-by: Lily Brown <lbrown@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> --------- Co-authored-by: Arseny Kapoulkine <arseny.kapoulkine@gmail.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Lily Brown <lbrown@roblox.com> Co-authored-by: Aaron Weiss <aaronweiss@roblox.com> Co-authored-by: Alexander McCord <amccord@roblox.com> Co-authored-by: Aviral Goel <agoel@roblox.com>
997 lines
30 KiB
C++
997 lines
30 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/Scope.h"
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#include "Luau/ToString.h"
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#include "Fixture.h"
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#include "ScopedFlags.h"
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#include "doctest.h"
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using namespace Luau;
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LUAU_FASTFLAG(LuauRecursiveTypeParameterRestriction);
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LUAU_FASTFLAG(DebugLuauDeferredConstraintResolution);
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TEST_SUITE_BEGIN("ToString");
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TEST_CASE_FIXTURE(Fixture, "primitive")
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{
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CheckResult result = check("local a = nil local b = 44 local c = 'lalala' local d = true");
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LUAU_REQUIRE_NO_ERRORS(result);
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// A variable without an annotation and with a nil literal should infer as 'free', not 'nil'
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CHECK_NE("nil", toString(requireType("a")));
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CHECK_EQ("number", toString(requireType("b")));
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CHECK_EQ("string", toString(requireType("c")));
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CHECK_EQ("boolean", toString(requireType("d")));
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}
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TEST_CASE_FIXTURE(Fixture, "bound_types")
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{
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CheckResult result = check("local a = 444 local b = a");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("number", toString(requireType("b")));
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}
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TEST_CASE_FIXTURE(Fixture, "free_types")
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{
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CheckResult result = check("local a");
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LUAU_REQUIRE_NO_ERRORS(result);
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CHECK_EQ("a", toString(requireType("a")));
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}
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TEST_CASE_FIXTURE(Fixture, "cyclic_table")
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{
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Type cyclicTable{TypeVariant(TableType())};
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TableType* tableOne = getMutable<TableType>(&cyclicTable);
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tableOne->props["self"] = {&cyclicTable};
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ("t1 where t1 = {| self: t1 |}", toString(&cyclicTable));
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else
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CHECK_EQ("t1 where t1 = { self: t1 }", toString(&cyclicTable));
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}
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TEST_CASE_FIXTURE(Fixture, "named_table")
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{
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Type table{TypeVariant(TableType())};
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TableType* t = getMutable<TableType>(&table);
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t->name = "TheTable";
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CHECK_EQ("TheTable", toString(&table));
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}
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TEST_CASE_FIXTURE(Fixture, "empty_table")
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{
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CheckResult result = check(R"(
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local a: {}
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)");
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ("{ }", toString(requireType("a")));
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else
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CHECK_EQ("{| |}", toString(requireType("a")));
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// Should stay the same with useLineBreaks enabled
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ToStringOptions opts;
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opts.useLineBreaks = true;
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ("{ }", toString(requireType("a"), opts));
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else
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CHECK_EQ("{| |}", toString(requireType("a"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "table_respects_use_line_break")
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{
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CheckResult result = check(R"(
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local a: { prop: string, anotherProp: number, thirdProp: boolean }
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)");
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ToStringOptions opts;
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opts.useLineBreaks = true;
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//clang-format off
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ("{\n"
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" anotherProp: number,\n"
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" prop: string,\n"
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" thirdProp: boolean\n"
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"}",
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toString(requireType("a"), opts));
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else
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CHECK_EQ("{|\n"
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" anotherProp: number,\n"
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" prop: string,\n"
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" thirdProp: boolean\n"
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"|}",
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toString(requireType("a"), opts));
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//clang-format on
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}
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TEST_CASE_FIXTURE(Fixture, "nil_or_nil_is_nil_not_question_mark")
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{
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CheckResult result = check(R"(
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type nil_ty = nil | nil
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local a : nil_ty = nil
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)");
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ToStringOptions opts;
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opts.useLineBreaks = false;
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CHECK_EQ("nil", toString(requireType("a"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "long_disjunct_of_nil_is_nil_not_question_mark")
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{
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CheckResult result = check(R"(
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type nil_ty = nil | nil | nil | nil | nil
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local a : nil_ty = nil
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)");
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ToStringOptions opts;
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opts.useLineBreaks = false;
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CHECK_EQ("nil", toString(requireType("a"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "metatable")
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{
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Type table{TypeVariant(TableType())};
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Type metatable{TypeVariant(TableType())};
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Type mtv{TypeVariant(MetatableType{&table, &metatable})};
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ("{ @metatable {| |}, {| |} }", toString(&mtv));
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else
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CHECK_EQ("{ @metatable { }, { } }", toString(&mtv));
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}
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TEST_CASE_FIXTURE(Fixture, "named_metatable")
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{
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Type table{TypeVariant(TableType())};
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Type metatable{TypeVariant(TableType())};
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Type mtv{TypeVariant(MetatableType{&table, &metatable, "NamedMetatable"})};
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CHECK_EQ("NamedMetatable", toString(&mtv));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "named_metatable_toStringNamedFunction")
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{
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CheckResult result = check(R"(
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local function createTbl(): NamedMetatable
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return setmetatable({}, {})
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end
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type NamedMetatable = typeof(createTbl())
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)");
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TypeId ty = requireType("createTbl");
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const FunctionType* ftv = get<FunctionType>(follow(ty));
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REQUIRE(ftv);
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CHECK_EQ("createTbl(): NamedMetatable", toStringNamedFunction("createTbl", *ftv));
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}
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TEST_CASE_FIXTURE(BuiltinsFixture, "exhaustive_toString_of_cyclic_table")
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{
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CheckResult result = check(R"(
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--!strict
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local Vec3 = {}
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Vec3.__index = Vec3
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function Vec3.new()
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return setmetatable({x=0, y=0, z=0}, Vec3)
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end
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export type Vec3 = typeof(Vec3.new())
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local thefun: any = function(self, o) return self end
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local multiply: ((Vec3, Vec3) -> Vec3) & ((Vec3, number) -> Vec3) = thefun
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Vec3.__mul = multiply
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local a = Vec3.new()
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)");
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std::string a = toString(requireType("a"), {true});
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CHECK_EQ(std::string::npos, a.find("CYCLE"));
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CHECK_EQ(std::string::npos, a.find("TRUNCATED"));
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//clang-format off
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CHECK_EQ("t2 where "
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"t1 = { __index: t1, __mul: ((t2, number) -> t2) & ((t2, t2) -> t2), new: () -> t2 } ; "
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"t2 = { @metatable t1, {| x: number, y: number, z: number |} }",
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a);
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//clang-format on
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}
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TEST_CASE_FIXTURE(Fixture, "intersection_parenthesized_only_if_needed")
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{
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auto utv = Type{UnionType{{builtinTypes->numberType, builtinTypes->stringType}}};
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auto itv = Type{IntersectionType{{&utv, builtinTypes->booleanType}}};
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CHECK_EQ(toString(&itv), "(number | string) & boolean");
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}
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TEST_CASE_FIXTURE(Fixture, "union_parenthesized_only_if_needed")
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{
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auto itv = Type{IntersectionType{{builtinTypes->numberType, builtinTypes->stringType}}};
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auto utv = Type{UnionType{{&itv, builtinTypes->booleanType}}};
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CHECK_EQ(toString(&utv), "(number & string) | boolean");
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}
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TEST_CASE_FIXTURE(Fixture, "functions_are_always_parenthesized_in_unions_or_intersections")
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{
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auto stringAndNumberPack = TypePackVar{TypePack{{builtinTypes->stringType, builtinTypes->numberType}}};
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auto numberAndStringPack = TypePackVar{TypePack{{builtinTypes->numberType, builtinTypes->stringType}}};
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auto sn2ns = Type{FunctionType{&stringAndNumberPack, &numberAndStringPack}};
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auto ns2sn = Type{FunctionType(frontend.globals.globalScope->level, &numberAndStringPack, &stringAndNumberPack)};
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auto utv = Type{UnionType{{&ns2sn, &sn2ns}}};
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auto itv = Type{IntersectionType{{&ns2sn, &sn2ns}}};
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CHECK_EQ(toString(&utv), "((number, string) -> (string, number)) | ((string, number) -> (number, string))");
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CHECK_EQ(toString(&itv), "((number, string) -> (string, number)) & ((string, number) -> (number, string))");
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}
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TEST_CASE_FIXTURE(Fixture, "simple_intersections_printed_on_one_line")
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{
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ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
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CheckResult result = check(R"(
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local a: string & number
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)");
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ToStringOptions opts;
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opts.useLineBreaks = true;
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CHECK_EQ("number & string", toString(requireType("a"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "complex_intersections_printed_on_multiple_lines")
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{
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ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
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CheckResult result = check(R"(
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local a: string & number & boolean
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)");
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ToStringOptions opts;
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opts.useLineBreaks = true;
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opts.compositeTypesSingleLineLimit = 2;
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//clang-format off
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CHECK_EQ("boolean\n"
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"& number\n"
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"& string",
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toString(requireType("a"), opts));
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//clang-format on
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}
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TEST_CASE_FIXTURE(Fixture, "overloaded_functions_always_printed_on_multiple_lines")
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{
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ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
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CheckResult result = check(R"(
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local a: ((string) -> string) & ((number) -> number)
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)");
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ToStringOptions opts;
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opts.useLineBreaks = true;
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//clang-format off
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CHECK_EQ("((number) -> number)\n"
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"& ((string) -> string)",
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toString(requireType("a"), opts));
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//clang-format on
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}
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TEST_CASE_FIXTURE(Fixture, "simple_unions_printed_on_one_line")
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{
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ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
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CheckResult result = check(R"(
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local a: number | boolean
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)");
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ToStringOptions opts;
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opts.useLineBreaks = true;
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CHECK_EQ("boolean | number", toString(requireType("a"), opts));
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}
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TEST_CASE_FIXTURE(Fixture, "complex_unions_printed_on_multiple_lines")
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{
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ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
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CheckResult result = check(R"(
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local a: string | number | boolean
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)");
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ToStringOptions opts;
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opts.compositeTypesSingleLineLimit = 2;
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opts.useLineBreaks = true;
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//clang-format off
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CHECK_EQ("boolean\n"
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"| number\n"
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"| string",
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toString(requireType("a"), opts));
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//clang-format on
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}
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TEST_CASE_FIXTURE(Fixture, "quit_stringifying_table_type_when_length_is_exceeded")
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{
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TableType ttv{};
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for (char c : std::string("abcdefghijklmno"))
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ttv.props[std::string(1, c)] = {builtinTypes->numberType};
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Type tv{ttv};
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ToStringOptions o;
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o.exhaustive = false;
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o.maxTableLength = 40;
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ(toString(&tv, o), "{| a: number, b: number, c: number, d: number, e: number, ... 10 more ... |}");
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else
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CHECK_EQ(toString(&tv, o), "{ a: number, b: number, c: number, d: number, e: number, ... 10 more ... }");
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_table_type_is_still_capped_when_exhaustive")
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{
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TableType ttv{};
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for (char c : std::string("abcdefg"))
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ttv.props[std::string(1, c)] = {builtinTypes->numberType};
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Type tv{ttv};
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ToStringOptions o;
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o.exhaustive = true;
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o.maxTableLength = 40;
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ(toString(&tv, o), "{| a: number, b: number, c: number, d: number, e: number, ... 2 more ... |}");
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else
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CHECK_EQ(toString(&tv, o), "{ a: number, b: number, c: number, d: number, e: number, ... 2 more ... }");
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}
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TEST_CASE_FIXTURE(Fixture, "quit_stringifying_type_when_length_is_exceeded")
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{
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CheckResult result = check(R"(
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function f0() end
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function f1(f) return f or f0 end
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function f2(f) return f or f1 end
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function f3(f) return f or f2 end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions o;
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o.exhaustive = false;
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if (FFlag::DebugLuauDeferredConstraintResolution)
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{
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o.maxTypeLength = 30;
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CHECK_EQ(toString(requireType("f0"), o), "() -> ()");
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CHECK_EQ(toString(requireType("f1"), o), "<a>(a) -> (() -> ()) | (a & ~(false?))... *TRUNCATED*");
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CHECK_EQ(toString(requireType("f2"), o), "<b>(b) -> (<a>(a) -> (() -> ()) | (a & ~(false?))... *TRUNCATED*");
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CHECK_EQ(toString(requireType("f3"), o), "<c>(c) -> (<b>(b) -> (<a>(a) -> (() -> ()) | (a & ~(false?))... *TRUNCATED*");
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}
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else
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{
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o.maxTypeLength = 40;
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CHECK_EQ(toString(requireType("f0"), o), "() -> ()");
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CHECK_EQ(toString(requireType("f1"), o), "(() -> ()) -> () -> ()");
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CHECK_EQ(toString(requireType("f2"), o), "((() -> ()) -> () -> ()) -> (() -> ()) -> ... *TRUNCATED*");
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CHECK_EQ(toString(requireType("f3"), o), "(((() -> ()) -> () -> ()) -> (() -> ()) -> ... *TRUNCATED*");
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}
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_type_is_still_capped_when_exhaustive")
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{
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CheckResult result = check(R"(
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function f0() end
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function f1(f) return f or f0 end
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function f2(f) return f or f1 end
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function f3(f) return f or f2 end
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)");
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LUAU_REQUIRE_NO_ERRORS(result);
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ToStringOptions o;
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o.exhaustive = true;
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if (FFlag::DebugLuauDeferredConstraintResolution)
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{
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o.maxTypeLength = 30;
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CHECK_EQ(toString(requireType("f0"), o), "() -> ()");
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CHECK_EQ(toString(requireType("f1"), o), "<a>(a) -> (() -> ()) | (a & ~(false?))... *TRUNCATED*");
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CHECK_EQ(toString(requireType("f2"), o), "<b>(b) -> (<a>(a) -> (() -> ()) | (a & ~(false?))... *TRUNCATED*");
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CHECK_EQ(toString(requireType("f3"), o), "<c>(c) -> (<b>(b) -> (<a>(a) -> (() -> ()) | (a & ~(false?))... *TRUNCATED*");
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}
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else
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{
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o.maxTypeLength = 40;
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CHECK_EQ(toString(requireType("f0"), o), "() -> ()");
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CHECK_EQ(toString(requireType("f1"), o), "(() -> ()) -> () -> ()");
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CHECK_EQ(toString(requireType("f2"), o), "((() -> ()) -> () -> ()) -> (() -> ()) -> ... *TRUNCATED*");
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CHECK_EQ(toString(requireType("f3"), o), "(((() -> ()) -> () -> ()) -> (() -> ()) -> ... *TRUNCATED*");
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}
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_table_type_correctly_use_matching_table_state_braces")
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{
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TableType ttv{TableState::Sealed, TypeLevel{}};
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for (char c : std::string("abcdefghij"))
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ttv.props[std::string(1, c)] = {builtinTypes->numberType};
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Type tv{ttv};
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ToStringOptions o;
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o.maxTableLength = 40;
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if (FFlag::DebugLuauDeferredConstraintResolution)
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CHECK_EQ(toString(&tv, o), "{ a: number, b: number, c: number, d: number, e: number, ... 5 more ... }");
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else
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CHECK_EQ(toString(&tv, o), "{| a: number, b: number, c: number, d: number, e: number, ... 5 more ... |}");
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}
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TEST_CASE_FIXTURE(Fixture, "stringifying_cyclic_union_type_bails_early")
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{
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Type tv{UnionType{{builtinTypes->stringType, builtinTypes->numberType}}};
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UnionType* utv = getMutable<UnionType>(&tv);
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utv->options.push_back(&tv);
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utv->options.push_back(&tv);
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CHECK_EQ("t1 where t1 = number | string", toString(&tv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "stringifying_cyclic_intersection_type_bails_early")
|
|
{
|
|
Type tv{IntersectionType{}};
|
|
IntersectionType* itv = getMutable<IntersectionType>(&tv);
|
|
itv->parts.push_back(&tv);
|
|
itv->parts.push_back(&tv);
|
|
|
|
CHECK_EQ("t1 where t1 = t1 & t1", toString(&tv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "stringifying_array_uses_array_syntax")
|
|
{
|
|
TableType ttv{TableState::Sealed, TypeLevel{}};
|
|
ttv.indexer = TableIndexer{builtinTypes->numberType, builtinTypes->stringType};
|
|
|
|
CHECK_EQ("{string}", toString(Type{ttv}));
|
|
|
|
ttv.props["A"] = {builtinTypes->numberType};
|
|
if (FFlag::DebugLuauDeferredConstraintResolution)
|
|
CHECK_EQ("{ [number]: string, A: number }", toString(Type{ttv}));
|
|
else
|
|
CHECK_EQ("{| [number]: string, A: number |}", toString(Type{ttv}));
|
|
|
|
ttv.props.clear();
|
|
ttv.state = TableState::Unsealed;
|
|
CHECK_EQ("{string}", toString(Type{ttv}));
|
|
}
|
|
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "generic_packs_are_stringified_differently_from_generic_types")
|
|
{
|
|
TypePackVar tpv{GenericTypePack{"a"}};
|
|
CHECK_EQ(toString(&tpv), "a...");
|
|
|
|
Type tv{GenericType{"a"}};
|
|
CHECK_EQ(toString(&tv), "a");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "function_type_with_argument_names")
|
|
{
|
|
CheckResult result = check("type MyFunc = (a: number, string, c: number) -> string; local a : MyFunc");
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
ToStringOptions opts;
|
|
opts.functionTypeArguments = true;
|
|
CHECK_EQ("(a: number, string, c: number) -> string", toString(requireType("a"), opts));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "function_type_with_argument_names_generic")
|
|
{
|
|
CheckResult result = check("local function f<a...>(n: number, ...: a...): (a...) return ... end");
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
ToStringOptions opts;
|
|
opts.functionTypeArguments = true;
|
|
CHECK_EQ("<a...>(n: number, a...) -> (a...)", toString(requireType("f"), opts));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "function_type_with_argument_names_and_self")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local tbl = {}
|
|
tbl.a = 2
|
|
function tbl:foo(b: number, c: number) return (self.a :: number) + b + c end
|
|
type Table = typeof(tbl)
|
|
type Foo = typeof(tbl.foo)
|
|
local u: Foo
|
|
)");
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
ToStringOptions opts;
|
|
opts.functionTypeArguments = true;
|
|
// Can't guess the name of 'self' to compare name, but at least there should be no assertion
|
|
toString(requireType("u"), opts);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "generate_friendly_names_for_inferred_generics")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function id(x) return x end
|
|
|
|
function id2(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30)
|
|
return a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK_EQ("<a>(a) -> a", toString(requireType("id")));
|
|
|
|
CHECK_EQ("<a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, a1, b1, c1, d1>(a, b, c, d, e, f, g, h, i, j, k, l, "
|
|
"m, n, o, p, q, r, s, t, u, v, w, x, y, z, a1, b1, c1, d1) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, "
|
|
"x, y, z, a1, b1, c1, d1)",
|
|
toString(requireType("id2")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringDetailed")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function id3(a, b, c)
|
|
return a, b, c
|
|
end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
ToStringOptions opts;
|
|
|
|
TypeId id3Type = requireType("id3");
|
|
ToStringResult nameData = toStringDetailed(id3Type, opts);
|
|
|
|
REQUIRE(3 == opts.nameMap.types.size());
|
|
|
|
REQUIRE_EQ("<a, b, c>(a, b, c) -> (a, b, c)", nameData.name);
|
|
|
|
const FunctionType* ftv = get<FunctionType>(follow(id3Type));
|
|
REQUIRE(ftv != nullptr);
|
|
|
|
auto params = flatten(ftv->argTypes).first;
|
|
REQUIRE(3 == params.size());
|
|
|
|
CHECK("a" == toString(params[0], opts));
|
|
CHECK("b" == toString(params[1], opts));
|
|
CHECK("c" == toString(params[2], opts));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(BuiltinsFixture, "toStringDetailed2")
|
|
{
|
|
ScopedFastFlag sff[] = {
|
|
{"DebugLuauSharedSelf", true},
|
|
};
|
|
|
|
CheckResult result = check(R"(
|
|
local base = {}
|
|
function base:one() return 1 end
|
|
|
|
local child = {}
|
|
setmetatable(child, {__index=base})
|
|
function child:two() return 2 end
|
|
|
|
local inst = {}
|
|
setmetatable(inst, {__index=child})
|
|
)");
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
ToStringOptions opts;
|
|
|
|
TypeId tType = requireType("inst");
|
|
ToStringResult r = toStringDetailed(tType, opts);
|
|
CHECK_EQ("{ @metatable { __index: { @metatable {| __index: base |}, child } }, inst }", r.name);
|
|
CHECK(0 == opts.nameMap.types.size());
|
|
|
|
const MetatableType* tMeta = get<MetatableType>(follow(tType));
|
|
REQUIRE(tMeta);
|
|
|
|
TableType* tMeta2 = getMutable<TableType>(follow(tMeta->metatable));
|
|
REQUIRE(tMeta2);
|
|
REQUIRE(tMeta2->props.count("__index"));
|
|
|
|
const MetatableType* tMeta3 = get<MetatableType>(follow(tMeta2->props["__index"].type()));
|
|
REQUIRE(tMeta3);
|
|
|
|
TableType* tMeta4 = getMutable<TableType>(follow(tMeta3->metatable));
|
|
REQUIRE(tMeta4);
|
|
REQUIRE(tMeta4->props.count("__index"));
|
|
|
|
TableType* tMeta5 = getMutable<TableType>(follow(tMeta4->props["__index"].type()));
|
|
REQUIRE(tMeta5);
|
|
REQUIRE(tMeta5->props.count("one") > 0);
|
|
|
|
TableType* tMeta6 = getMutable<TableType>(follow(tMeta3->table));
|
|
REQUIRE(tMeta6);
|
|
REQUIRE(tMeta6->props.count("two") > 0);
|
|
|
|
ToStringResult oneResult = toStringDetailed(tMeta5->props["one"].type(), opts);
|
|
|
|
std::string twoResult = toString(tMeta6->props["two"].type(), opts);
|
|
|
|
CHECK_EQ("<a>(a) -> number", oneResult.name);
|
|
CHECK_EQ("<b>(b) -> number", twoResult);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringErrorPack")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function target(callback: nil) return callback(4, "hello") end
|
|
)");
|
|
|
|
LUAU_REQUIRE_ERRORS(result);
|
|
CHECK_EQ("(nil) -> (*error-type*)", toString(requireType("target")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringGenericPack")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function foo(a, b) return a(b) end
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
CHECK_EQ(toString(requireType("foo")), "<a, b...>((a) -> (b...), a) -> (b...)");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toString_the_boundTo_table_type_contained_within_a_TypePack")
|
|
{
|
|
Type tv1{TableType{}};
|
|
TableType* ttv = getMutable<TableType>(&tv1);
|
|
ttv->state = TableState::Sealed;
|
|
ttv->props["hello"] = {builtinTypes->numberType};
|
|
ttv->props["world"] = {builtinTypes->numberType};
|
|
|
|
TypePackVar tpv1{TypePack{{&tv1}}};
|
|
|
|
Type tv2{TableType{}};
|
|
TableType* bttv = getMutable<TableType>(&tv2);
|
|
bttv->state = TableState::Free;
|
|
bttv->props["hello"] = {builtinTypes->numberType};
|
|
bttv->boundTo = &tv1;
|
|
|
|
TypePackVar tpv2{TypePack{{&tv2}}};
|
|
|
|
|
|
if (FFlag::DebugLuauDeferredConstraintResolution)
|
|
{
|
|
CHECK_EQ("{ hello: number, world: number }", toString(&tpv1));
|
|
CHECK_EQ("{ hello: number, world: number }", toString(&tpv2));
|
|
}
|
|
else
|
|
{
|
|
CHECK_EQ("{| hello: number, world: number |}", toString(&tpv1));
|
|
CHECK_EQ("{| hello: number, world: number |}", toString(&tpv2));
|
|
}
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "no_parentheses_around_return_type_if_pack_has_an_empty_head_link")
|
|
{
|
|
TypeArena arena;
|
|
TypePackId realTail = arena.addTypePack({builtinTypes->stringType});
|
|
TypePackId emptyTail = arena.addTypePack({}, realTail);
|
|
|
|
TypePackId argList = arena.addTypePack({builtinTypes->stringType});
|
|
|
|
TypeId functionType = arena.addType(FunctionType{argList, emptyTail});
|
|
|
|
CHECK("(string) -> string" == toString(functionType));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "no_parentheses_around_cyclic_function_type_in_union")
|
|
{
|
|
CheckResult result = check(R"(
|
|
type F = ((() -> number)?) -> F?
|
|
local function f(p) return f end
|
|
local g: F = f
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK_EQ("t1 where t1 = ((() -> number)?) -> t1?", toString(requireType("g")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "no_parentheses_around_cyclic_function_type_in_intersection")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function f() return f end
|
|
local a: ((number) -> ()) & typeof(f)
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK_EQ("((number) -> ()) & t1 where t1 = () -> t1", toString(requireType("a")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "self_recursive_instantiated_param")
|
|
{
|
|
Type tableTy{TableType{}};
|
|
TableType* ttv = getMutable<TableType>(&tableTy);
|
|
ttv->name = "Table";
|
|
ttv->instantiatedTypeParams.push_back(&tableTy);
|
|
|
|
CHECK_EQ(toString(tableTy), "Table<Table>");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_id")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function id(x) return x end
|
|
)");
|
|
|
|
TypeId ty = requireType("id");
|
|
const FunctionType* ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("id<a>(x: a): a", toStringNamedFunction("id", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_map")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function map(arr, fn)
|
|
local t = {}
|
|
for i = 0, #arr do
|
|
t[i] = fn(arr[i])
|
|
end
|
|
return t
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("map");
|
|
const FunctionType* ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("map<a, b>(arr: {a}, fn: (a) -> b): {b}", toStringNamedFunction("map", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_generic_pack")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f(a: number, b: string) end
|
|
local function test<T..., U...>(...: T...): U...
|
|
f(...)
|
|
return 1, 2, 3
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("test");
|
|
const FunctionType* ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("test<T..., U...>(...: T...): U...", toStringNamedFunction("test", *ftv));
|
|
}
|
|
|
|
TEST_CASE("toStringNamedFunction_unit_f")
|
|
{
|
|
TypePackVar empty{TypePack{}};
|
|
FunctionType ftv{&empty, &empty, {}, false};
|
|
CHECK_EQ("f(): ()", toStringNamedFunction("f", ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_variadics")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f<a, b...>(x: a, ...): (a, a, b...)
|
|
return x, x, ...
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("f<a, b...>(x: a, ...: any): (a, a, b...)", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_variadics2")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f(): ...number
|
|
return 1, 2, 3
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("f(): ...number", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_variadics3")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f(): (string, ...number)
|
|
return 'a', 1, 2, 3
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("f(): (string, ...number)", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_type_annotation_has_partial_argnames")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local f: (number, y: number) -> number
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionType>(follow(ty));
|
|
|
|
CHECK_EQ("f(_: number, y: number): number", toStringNamedFunction("f", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_hide_type_params")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function f<T>(x: T, g: <U>(T) -> U)): ()
|
|
end
|
|
)");
|
|
|
|
TypeId ty = requireType("f");
|
|
auto ftv = get<FunctionType>(follow(ty));
|
|
|
|
ToStringOptions opts;
|
|
opts.hideNamedFunctionTypeParameters = true;
|
|
CHECK_EQ("f(x: T, g: <U>(T) -> U): ()", toStringNamedFunction("f", *ftv, opts));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_overrides_param_names")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local function test(a, b : string, ... : number) return a end
|
|
)");
|
|
|
|
TypeId ty = requireType("test");
|
|
const FunctionType* ftv = get<FunctionType>(follow(ty));
|
|
|
|
ToStringOptions opts;
|
|
opts.namedFunctionOverrideArgNames = {"first", "second", "third"};
|
|
CHECK_EQ("test<a>(first: a, second: string, ...: number): a", toStringNamedFunction("test", *ftv, opts));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "pick_distinct_names_for_mixed_explicit_and_implicit_generics")
|
|
{
|
|
CheckResult result = check(R"(
|
|
function foo<a>(x: a, y) end
|
|
)");
|
|
|
|
CHECK("<a, b>(a, b) -> ()" == toString(requireType("foo")));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_include_self_param")
|
|
{
|
|
ScopedFastFlag sff[]{
|
|
{"DebugLuauSharedSelf", true},
|
|
};
|
|
|
|
CheckResult result = check(R"(
|
|
local foo = {}
|
|
function foo:method(arg: string): ()
|
|
end
|
|
)");
|
|
|
|
TypeId parentTy = requireType("foo");
|
|
auto ttv = get<TableType>(follow(parentTy));
|
|
auto ftv = get<FunctionType>(follow(ttv->props.at("method").type()));
|
|
|
|
if (FFlag::DebugLuauDeferredConstraintResolution)
|
|
CHECK_EQ("foo:method(self: unknown, arg: string): ()", toStringNamedFunction("foo:method", *ftv));
|
|
else
|
|
CHECK_EQ("foo:method<a>(self: a, arg: string): ()", toStringNamedFunction("foo:method", *ftv));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "toStringNamedFunction_hide_self_param")
|
|
{
|
|
ScopedFastFlag sff[]{
|
|
{"DebugLuauSharedSelf", true},
|
|
};
|
|
|
|
CheckResult result = check(R"(
|
|
local foo = {}
|
|
function foo:method(arg: string): ()
|
|
end
|
|
)");
|
|
|
|
ToStringOptions opts;
|
|
opts.hideFunctionSelfArgument = true;
|
|
|
|
TypeId parentTy = requireType("foo");
|
|
auto ttv = get<TableType>(follow(parentTy));
|
|
REQUIRE_MESSAGE(ttv, "Expected a table but got " << toString(parentTy, opts));
|
|
TypeId methodTy = follow(ttv->props.at("method").type());
|
|
auto ftv = get<FunctionType>(methodTy);
|
|
REQUIRE_MESSAGE(ftv, "Expected a function but got " << toString(methodTy, opts));
|
|
|
|
if (FFlag::DebugLuauDeferredConstraintResolution)
|
|
CHECK_EQ("foo:method(arg: string): ()", toStringNamedFunction("foo:method", *ftv, opts));
|
|
else
|
|
CHECK_EQ("foo:method<a>(arg: string): ()", toStringNamedFunction("foo:method", *ftv, opts));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "tostring_unsee_ttv_if_array")
|
|
{
|
|
CheckResult result = check(R"(
|
|
local x: {string}
|
|
-- This code is constructed very specifically to use the same (by pointer
|
|
-- identity) type in the function twice.
|
|
local y: (typeof(x), typeof(x)) -> ()
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
CHECK(toString(requireType("y")) == "({string}, {string}) -> ()");
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "tostring_error_mismatch")
|
|
{
|
|
CheckResult result = check(R"(
|
|
--!strict
|
|
function f1() : {a : number, b : string, c : { d : number}}
|
|
return { a = 1, b = "a", c = {d = "a"}}
|
|
end
|
|
|
|
)");
|
|
//clang-format off
|
|
std::string expected =
|
|
(FFlag::DebugLuauDeferredConstraintResolution) ?
|
|
R"(Type
|
|
'{| a: number, b: string, c: {| d: string |} |}'
|
|
could not be converted into
|
|
'{ a: number, b: string, c: { d: number } }'
|
|
caused by:
|
|
Property 'c' is not compatible.
|
|
Type
|
|
'{| d: string |}'
|
|
could not be converted into
|
|
'{ d: number }'
|
|
caused by:
|
|
Property 'd' is not compatible.
|
|
Type 'string' could not be converted into 'number' in an invariant context)"
|
|
:
|
|
R"(Type
|
|
'{ a: number, b: string, c: { d: string } }'
|
|
could not be converted into
|
|
'{| a: number, b: string, c: {| d: number |} |}'
|
|
caused by:
|
|
Property 'c' is not compatible.
|
|
Type
|
|
'{ d: string }'
|
|
could not be converted into
|
|
'{| d: number |}'
|
|
caused by:
|
|
Property 'd' is not compatible.
|
|
Type 'string' could not be converted into 'number' in an invariant context)";
|
|
//clang-format on
|
|
//
|
|
std::string actual = toString(result.errors[0]);
|
|
|
|
LUAU_REQUIRE_ERROR_COUNT(1, result);
|
|
|
|
CHECK(expected == actual);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "checked_fn_toString")
|
|
{
|
|
ScopedFastFlag flags[] = {
|
|
{"LuauCheckedFunctionSyntax", true},
|
|
{"DebugLuauDeferredConstraintResolution", true},
|
|
};
|
|
|
|
auto _result = loadDefinition(R"(
|
|
declare function @checked abs(n: number) : number
|
|
)");
|
|
|
|
auto result = check(Mode::Nonstrict, R"(
|
|
local f = abs
|
|
)");
|
|
|
|
LUAU_REQUIRE_NO_ERRORS(result);
|
|
|
|
TypeId fn = requireType("f");
|
|
CHECK("@checked (number) -> number" == toString(fn));
|
|
}
|
|
TEST_SUITE_END();
|