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0b2755f964
* Progress toward a diffing algorithm for types. We hope that this will
be useful for writing clearer error messages.
* Add a missing recursion limiter in `Unifier::tryUnifyTables`. This was
causing a crash in certain situations.
* Luau heap graph enumeration improvements:
* Weak references are not reported
* Added tag as a fallback name of non-string table links
* Included top Luau function information in thread name to understand
where thread might be suspended
* Constant folding for `math.pi` and `math.huge` at -O2
* Optimize `string.format` and `%*`
* This change makes string interpolation 1.5x-2x faster depending on the
number and type of formatted components, assuming a few are using
primitive types, and reduces associated GC pressure.
New type checker:
* Initial work toward tracking the upper and lower bounds of types
accurately.
Native code generation (JIT):
* Add IrCmd::CHECK_TRUTHY for improved assert fast-calls
* Do not compute type map for modules without types
* Capture metatable+readonly state for NEW_TABLE IR instructions
* Replace JUMP_CMP_ANY with CMP_ANY and existing JUMP_EQ_INT
* Add support for exits to VM with reentry lock in VmExit
---------
Co-authored-by: Arseny Kapoulkine <arseny.kapoulkine@gmail.com>
Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
108 lines
2.8 KiB
C++
108 lines
2.8 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 "Luau/TypeArena.h"
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#include "Luau/Unifier2.h"
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#include "Luau/Error.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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struct Unifier2Fixture
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{
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TypeArena arena;
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BuiltinTypes builtinTypes;
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Scope scope{builtinTypes.anyTypePack};
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InternalErrorReporter iceReporter;
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Unifier2 u2{NotNull{&arena}, NotNull{&builtinTypes}, NotNull{&iceReporter}};
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ToStringOptions opts;
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ScopedFastFlag sff{"DebugLuauDeferredConstraintResolution", true};
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std::pair<TypeId, FreeType*> freshType()
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{
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FreeType ft{&scope, builtinTypes.neverType, builtinTypes.unknownType};
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TypeId ty = arena.addType(ft);
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FreeType* ftv = getMutable<FreeType>(ty);
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REQUIRE(ftv != nullptr);
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return {ty, ftv};
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}
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std::string toString(TypeId ty)
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{
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return ::Luau::toString(ty, opts);
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}
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};
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TEST_SUITE_BEGIN("Unifier2");
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TEST_CASE_FIXTURE(Unifier2Fixture, "T <: number")
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{
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auto [left, freeLeft] = freshType();
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CHECK(u2.unify(left, builtinTypes.numberType));
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CHECK("never" == toString(freeLeft->lowerBound));
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CHECK("number" == toString(freeLeft->upperBound));
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}
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TEST_CASE_FIXTURE(Unifier2Fixture, "number <: T")
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{
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auto [right, freeRight] = freshType();
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CHECK(u2.unify(builtinTypes.numberType, right));
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CHECK("number" == toString(freeRight->lowerBound));
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CHECK("unknown" == toString(freeRight->upperBound));
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}
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TEST_CASE_FIXTURE(Unifier2Fixture, "T <: U")
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{
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auto [left, freeLeft] = freshType();
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auto [right, freeRight] = freshType();
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CHECK(u2.unify(left, right));
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CHECK("t1 where t1 = ('a <: (t1 <: 'b))" == toString(left));
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CHECK("t1 where t1 = (('a <: t1) <: 'b)" == toString(right));
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CHECK("never" == toString(freeLeft->lowerBound));
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CHECK("t1 where t1 = (('a <: t1) <: 'b)" == toString(freeLeft->upperBound));
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CHECK("t1 where t1 = ('a <: (t1 <: 'b))" == toString(freeRight->lowerBound));
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CHECK("unknown" == toString(freeRight->upperBound));
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}
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TEST_CASE_FIXTURE(Unifier2Fixture, "(string) -> () <: (X) -> Y...")
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{
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TypeId stringToUnit = arena.addType(FunctionType{
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arena.addTypePack({builtinTypes.stringType}),
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arena.addTypePack({})
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});
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auto [x, xFree] = freshType();
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TypePackId y = arena.freshTypePack(&scope);
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TypeId xToY = arena.addType(FunctionType{
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arena.addTypePack({x}),
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y
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});
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u2.unify(stringToUnit, xToY);
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CHECK("string" == toString(xFree->upperBound));
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const TypePack* yPack = get<TypePack>(follow(y));
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REQUIRE(yPack != nullptr);
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CHECK(0 == yPack->head.size());
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CHECK(!yPack->tail);
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}
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TEST_SUITE_END();
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