mirror of
https://github.com/luau-lang/luau.git
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543de6e939
# General Updates * Fix some cases where documentation symbols would not be available when mouseovering at certain positions in the code * Scaffolding to help embedders have more control over how `typeof(x)` refines types * Refinements to require-by-string semantics. See https://github.com/luau-lang/rfcs/pull/56 for details. * Fix for https://github.com/luau-lang/luau/issues/1405 # New Solver * Fix many crashes (thanks you for your bug reports!) * Type functions can now call each other * Type functions all evaluate in a single VM. This should improve typechecking performance and reduce memory use. * `export type function` is now forbidden and fails with a clear error message * Type functions that access locals in the surrounding environment are now properly a parse error * You can now use `:setindexer(types.never, types.never)` to delete an indexer from a table type. # Internal Contributors Co-authored-by: Aaron Weiss <aaronweiss@roblox.com> Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: Varun Saini <vsaini@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
708 lines
18 KiB
C++
708 lines
18 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/Parser.h"
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#include "Luau/TypeAttach.h"
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#include "Luau/TypeInfer.h"
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#include "Luau/Type.h"
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#include "Luau/Transpiler.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(LuauUserDefinedTypeFunctionsSyntax2)
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TEST_SUITE_BEGIN("TranspilerTests");
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TEST_CASE("test_1")
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{
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const std::string example = R"(
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local function isPortal(element)
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if type(element)~='table'then
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return false
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end
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return element.component == Core.Portal
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end
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)";
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CHECK_EQ(example, transpile(example).code);
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}
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TEST_CASE("string_literals")
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{
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const std::string code = R"( local S='abcdef\n\f\a\020' )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("string_literals_containing_utf8")
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{
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const std::string code = R"( local S='lalala こんにちは' )"; // Konichiwa!
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("elseif_chains_indent_sensibly")
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{
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const std::string code = R"(
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if This then
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Once()
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elseif That then
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Another()
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elseif SecondLast then
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Third()
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else
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IfAllElseFails()
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end
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)";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("strips_type_annotations")
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{
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const std::string code = R"( local s: string= 'hello there' )";
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const std::string expected = R"( local s = 'hello there' )";
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CHECK_EQ(expected, transpile(code).code);
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}
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TEST_CASE("strips_type_assertion_expressions")
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{
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const std::string code = R"( local s= some_function() :: any+ something_else() :: number )";
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const std::string expected = R"( local s= some_function() + something_else() )";
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CHECK_EQ(expected, transpile(code).code);
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}
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TEST_CASE("function_taking_ellipsis")
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{
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const std::string code = R"( function F(...) end )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("omit_decimal_place_for_integers")
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{
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const std::string code = R"( local a=5, 6, 7, 3.141, 1.1290000000000002e+45 )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("for_loop")
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{
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const std::string one = R"( for i=1,10 do end )";
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CHECK_EQ(one, transpile(one).code);
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const std::string code = R"( for i=5,6,7 do end )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("for_in_loop")
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{
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const std::string code = R"( for k, v in ipairs(x)do end )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("while_loop")
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{
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const std::string code = R"( while f(x)do print() end )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("repeat_until_loop")
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{
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const std::string code = R"( repeat print() until f(x) )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("lambda")
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{
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const std::string one = R"( local p=function(o, m, g) return 77 end )";
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CHECK_EQ(one, transpile(one).code);
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const std::string two = R"( local p=function(o, m, g,...) return 77 end )";
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CHECK_EQ(two, transpile(two).code);
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}
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TEST_CASE("local_function")
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{
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const std::string one = R"( local function p(o, m, g) return 77 end )";
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CHECK_EQ(one, transpile(one).code);
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const std::string two = R"( local function p(o, m, g,...) return 77 end )";
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CHECK_EQ(two, transpile(two).code);
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}
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TEST_CASE("function")
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{
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const std::string one = R"( function p(o, m, g) return 77 end )";
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CHECK_EQ(one, transpile(one).code);
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const std::string two = R"( function p(o, m, g,...) return 77 end )";
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CHECK_EQ(two, transpile(two).code);
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}
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TEST_CASE("table_literals")
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{
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const std::string code = R"( local t={1, 2, 3, foo='bar', baz=99,[5.5]='five point five', 'end'} )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("more_table_literals")
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{
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const std::string code = R"( local t={['Content-Type']='text/plain'} )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("table_literal_preserves_record_vs_general")
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{
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const std::string code = R"( local t={['foo']='bar',quux=42} )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("table_literal_with_numeric_key")
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{
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const std::string code = R"( local t={[5]='five',[6]='six'} )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("table_literal_with_keyword_key")
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{
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const std::string code = R"( local t={['nil']=nil,['true']=true} )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("table_literal_closing_brace_at_correct_position")
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{
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const std::string code = R"(
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local t={
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eggs='Tasty',
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avocado='more like awesomecavo amirite'
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}
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)";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("method_calls")
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{
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const std::string code = R"( foo.bar.baz:quux() )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("method_definitions")
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{
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const std::string code = R"( function foo.bar.baz:quux() end )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("spaces_between_keywords_even_if_it_pushes_the_line_estimation_off")
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{
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// Luau::Parser doesn't exactly preserve the string representation of numbers in Lua, so we can find ourselves
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// falling out of sync with the original code. We need to push keywords out so that there's at least one space between them.
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const std::string code = R"( if math.abs(raySlope) < .01 then return 0 end )";
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const std::string expected = R"( if math.abs(raySlope) < 0.01 then return 0 end)";
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CHECK_EQ(expected, transpile(code).code);
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}
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TEST_CASE("numbers")
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{
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const std::string code = R"( local a=2510238627 )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("infinity")
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{
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const std::string code = R"( local a = 1e500 local b = 1e400 )";
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const std::string expected = R"( local a = 1e500 local b = 1e500 )";
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CHECK_EQ(expected, transpile(code).code);
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}
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TEST_CASE("escaped_strings")
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{
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const std::string code = R"( local s='\\b\\t\\n\\\\' )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("escaped_strings_2")
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{
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const std::string code = R"( local s="\a\b\f\n\r\t\v\'\"\\" )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("need_a_space_between_number_literals_and_dots")
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{
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const std::string code = R"( return point and math.ceil(point* 100000* 100)/ 100000 .. '%'or '' )";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("binary_keywords")
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{
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const std::string code = "local c = a0 ._ or b0 ._";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("do_blocks")
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{
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const std::string code = R"(
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foo()
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do
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local bar=baz()
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quux()
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end
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foo2()
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)";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("emit_a_do_block_in_cases_of_potentially_ambiguous_syntax")
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{
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const std::string code = R"(
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f();
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(g or f)()
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)";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE("roundtrip_types")
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{
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const std::string code = R"(
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local s:string='str'
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local t:{a:string,b:number,[string]:number}
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local fn:(string,string)->(number,number)
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local s2:typeof(s)='foo'
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local os:string?
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local sn:string|number
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local it:{x:number}&{y:number}
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)";
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auto allocator = Allocator{};
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auto names = AstNameTable{allocator};
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ParseOptions options;
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ParseResult parseResult = Parser::parse(code.data(), code.size(), names, allocator, options);
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REQUIRE(parseResult.errors.empty());
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CHECK_EQ(code, transpileWithTypes(*parseResult.root));
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}
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TEST_CASE("roundtrip_generic_types")
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{
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const std::string code = R"(
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export type A<T> = {v:T, next:A<T>}
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)";
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auto allocator = Allocator{};
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auto names = AstNameTable{allocator};
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ParseOptions options;
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ParseResult parseResult = Parser::parse(code.data(), code.size(), names, allocator, options);
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REQUIRE(parseResult.errors.empty());
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CHECK_EQ(code, transpileWithTypes(*parseResult.root));
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}
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TEST_CASE_FIXTURE(Fixture, "attach_types")
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{
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const std::string code = R"(
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local s='str'
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local t={a=1,b=false}
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local function fn()
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return 10
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end
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)";
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const std::string expected = R"(
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local s:string='str'
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local t:{a:number,b:boolean}={a=1,b=false}
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local function fn(): number
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return 10
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end
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)";
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CHECK_EQ(expected, decorateWithTypes(code));
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}
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TEST_CASE("a_table_key_can_be_the_empty_string")
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{
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std::string code = "local T = {[''] = true}";
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CHECK_EQ(code, transpile(code).code);
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}
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// There's a bit of login in the transpiler that always adds a space before a dot if the previous symbol ends in a digit.
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// This was surfacing an issue where we might not insert a space after the 'local' keyword.
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TEST_CASE("always_emit_a_space_after_local_keyword")
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{
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std::string code = "do local aZZZZ = Workspace.P1.Shape local bZZZZ = Enum.PartType.Cylinder end";
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std::string expected = "do local aZZZZ = Workspace.P1 .Shape local bZZZZ= Enum.PartType.Cylinder end";
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CHECK_EQ(expected, transpile(code).code);
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}
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TEST_CASE_FIXTURE(Fixture, "types_should_not_be_considered_cyclic_if_they_are_not_recursive")
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{
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std::string code = R"(
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local common: {foo:string} = {foo = 'foo'}
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local t = {}
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t.x = common
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t.y = common
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)";
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std::string expected = R"(
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local common: {foo:string} = {foo = 'foo'}
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local t:{x:{foo:string},y:{foo:string}}={}
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t.x = common
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t.y = common
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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, "type_lists_should_be_emitted_correctly")
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{
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std::string code = R"(
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local a = function(a: string, b: number, ...: string): (string, ...number)
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end
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local b = function(...: string): ...number
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end
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local c = function()
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end
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)";
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std::string expected = R"(
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local a:(string,number,...string)->(string,...number)=function(a:string,b:number,...:string): (string,...number)
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end
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local b:(...string)->(...number)=function(...:string): ...number
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end
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local c:()->()=function(): ()
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end
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)";
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std::string actual = decorateWithTypes(code);
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CHECK_EQ(expected, actual);
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}
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TEST_CASE_FIXTURE(Fixture, "function_type_location")
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{
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std::string code = R"(
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local function foo(x: number): number
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return x
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end
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local g: (number)->number = foo
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)";
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std::string expected = R"(
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local function foo(x: number): number
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return x
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end
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local g: (number)->(number)=foo
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)";
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std::string actual = decorateWithTypes(code);
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CHECK_EQ(expected, actual);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_type_assertion")
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{
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std::string code = "local a = 5 :: number";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_if_then_else")
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{
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std::string code = "local a = if 1 then 2 else 3";
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CHECK_EQ(code, transpile(code).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_type_reference_import")
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{
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fileResolver.source["game/A"] = R"(
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export type Type = { a: number }
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return {}
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)";
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std::string code = R"(
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local Import = require(game.A)
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local a: Import.Type
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)";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_type_packs")
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{
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std::string code = R"(
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type Packed<T...> = (T...)->(T...)
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local a: Packed<>
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local b: Packed<(number, string)>
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)";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_union_type_nested")
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{
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std::string code = "local a: ((number)->(string))|((string)->(string))";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_union_type_nested_2")
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{
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std::string code = "local a: (number&string)|(string&boolean)";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_union_type_nested_3")
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{
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std::string code = "local a: nil | (string & number)";
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CHECK_EQ("local a: ( string & number)?", transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_intersection_type_nested")
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{
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std::string code = "local a: ((number)->(string))&((string)->(string))";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_intersection_type_nested_2")
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{
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std::string code = "local a: (number|string)&(string|boolean)";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_varargs")
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{
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std::string code = "local function f(...) return ... end";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_index_expr")
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{
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std::string code = "local a = {1, 2, 3} local b = a[2]";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_unary")
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{
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std::string code = R"(
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local a = 1
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local b = -1
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local c = true
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local d = not c
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local e = 'hello'
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local d = #e
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)";
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CHECK_EQ(code, transpile(code, {}, true).code);
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}
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TEST_CASE_FIXTURE(Fixture, "transpile_break_continue")
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{
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std::string code = R"(
|
|
local a, b, c
|
|
repeat
|
|
if a then break end
|
|
if b then continue end
|
|
until c
|
|
)";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_compound_assignment")
|
|
{
|
|
std::string code = R"(
|
|
local a = 1
|
|
a += 2
|
|
a -= 3
|
|
a *= 4
|
|
a /= 5
|
|
a //= 5
|
|
a %= 6
|
|
a ^= 7
|
|
a ..= ' - result'
|
|
)";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_assign_multiple")
|
|
{
|
|
std::string code = "a, b, c = 1, 2, 3";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_generic_function")
|
|
{
|
|
std::string code = R"(
|
|
local function foo<T,S...>(a: T, ...: S...) return 1 end
|
|
local f: <T,S...>(T, S...)->(number) = foo
|
|
)";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_union_reverse")
|
|
{
|
|
std::string code = "local a: nil | number";
|
|
|
|
CHECK_EQ("local a: number?", transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_for_in_multiple")
|
|
{
|
|
std::string code = "for k,v in next,{}do print(k,v) end";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_error_expr")
|
|
{
|
|
std::string code = "local a = f:-";
|
|
|
|
auto allocator = Allocator{};
|
|
auto names = AstNameTable{allocator};
|
|
ParseResult parseResult = Parser::parse(code.data(), code.size(), names, allocator, {});
|
|
|
|
CHECK_EQ("local a = (error-expr: f:%error-id%)-(error-expr)", transpileWithTypes(*parseResult.root));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_error_stat")
|
|
{
|
|
std::string code = "-";
|
|
|
|
auto allocator = Allocator{};
|
|
auto names = AstNameTable{allocator};
|
|
ParseResult parseResult = Parser::parse(code.data(), code.size(), names, allocator, {});
|
|
|
|
CHECK_EQ("(error-stat: (error-expr))", transpileWithTypes(*parseResult.root));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_error_type")
|
|
{
|
|
std::string code = "local a: ";
|
|
|
|
auto allocator = Allocator{};
|
|
auto names = AstNameTable{allocator};
|
|
ParseResult parseResult = Parser::parse(code.data(), code.size(), names, allocator, {});
|
|
|
|
CHECK_EQ("local a:%error-type%", transpileWithTypes(*parseResult.root));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_parse_error")
|
|
{
|
|
std::string code = "local a = -";
|
|
|
|
auto result = transpile(code);
|
|
CHECK_EQ("", result.code);
|
|
CHECK_EQ("Expected identifier when parsing expression, got <eof>", result.parseError);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_to_string")
|
|
{
|
|
std::string code = "local a: string = 'hello'";
|
|
|
|
auto allocator = Allocator{};
|
|
auto names = AstNameTable{allocator};
|
|
ParseResult parseResult = Parser::parse(code.data(), code.size(), names, allocator, {});
|
|
|
|
REQUIRE(parseResult.root);
|
|
REQUIRE(parseResult.root->body.size == 1);
|
|
AstStatLocal* statLocal = parseResult.root->body.data[0]->as<AstStatLocal>();
|
|
REQUIRE(statLocal);
|
|
CHECK_EQ("local a: string = 'hello'", toString(statLocal));
|
|
REQUIRE(statLocal->vars.size == 1);
|
|
AstLocal* local = statLocal->vars.data[0];
|
|
REQUIRE(local->annotation);
|
|
CHECK_EQ("string", toString(local->annotation));
|
|
REQUIRE(statLocal->values.size == 1);
|
|
AstExpr* expr = statLocal->values.data[0];
|
|
CHECK_EQ("'hello'", toString(expr));
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_type_alias_default_type_parameters")
|
|
{
|
|
std::string code = R"(
|
|
type Packed<T = string, U = T, V... = ...boolean, W... = (T, U, V...)> = (T, U, V...)->(W...)
|
|
local a: Packed<number>
|
|
)";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_singleton_types")
|
|
{
|
|
std::string code = R"(
|
|
type t1 = 'hello'
|
|
type t2 = true
|
|
type t3 = ''
|
|
type t4 = false
|
|
)";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_array_types")
|
|
{
|
|
std::string code = R"(
|
|
type t1 = {number}
|
|
type t2 = {[string]: number}
|
|
)";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_for_in_multiple_types")
|
|
{
|
|
std::string code = "for k:string,v:boolean in next,{}do end";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_string_interp")
|
|
{
|
|
std::string code = R"( local _ = `hello {name}` )";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_string_literal_escape")
|
|
{
|
|
std::string code = R"( local _ = ` bracket = \{, backtick = \` = {'ok'} ` )";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_CASE_FIXTURE(Fixture, "transpile_type_functions")
|
|
{
|
|
ScopedFastFlag sff{FFlag::LuauUserDefinedTypeFunctionsSyntax2, true};
|
|
|
|
std::string code = R"( type function foo(arg1, arg2) if arg1 == arg2 then return arg1 end return arg2 end )";
|
|
|
|
CHECK_EQ(code, transpile(code, {}, true).code);
|
|
}
|
|
|
|
TEST_SUITE_END();
|