mirror of
https://github.com/luau-lang/luau.git
synced 2024-11-15 22:35:43 +08:00
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>
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
|
|
#pragma once
|
|
|
|
#include "Luau/NotNull.h"
|
|
#include "Luau/Substitution.h"
|
|
#include "Luau/Type.h"
|
|
#include "Luau/Unifiable.h"
|
|
|
|
namespace Luau
|
|
{
|
|
|
|
struct BuiltinTypes;
|
|
struct TxnLog;
|
|
struct TypeArena;
|
|
struct TypeCheckLimits;
|
|
|
|
// A substitution which replaces generic types in a given set by free types.
|
|
struct ReplaceGenerics : Substitution
|
|
{
|
|
ReplaceGenerics(const TxnLog* log, TypeArena* arena, NotNull<BuiltinTypes> builtinTypes, TypeLevel level, Scope* scope, const std::vector<TypeId>& generics,
|
|
const std::vector<TypePackId>& genericPacks)
|
|
: Substitution(log, arena)
|
|
, builtinTypes(builtinTypes)
|
|
, level(level)
|
|
, scope(scope)
|
|
, generics(generics)
|
|
, genericPacks(genericPacks)
|
|
{
|
|
}
|
|
|
|
NotNull<BuiltinTypes> builtinTypes;
|
|
|
|
TypeLevel level;
|
|
Scope* scope;
|
|
std::vector<TypeId> generics;
|
|
std::vector<TypePackId> genericPacks;
|
|
bool ignoreChildren(TypeId ty) override;
|
|
bool isDirty(TypeId ty) override;
|
|
bool isDirty(TypePackId tp) override;
|
|
TypeId clean(TypeId ty) override;
|
|
TypePackId clean(TypePackId tp) override;
|
|
};
|
|
|
|
// A substitution which replaces generic functions by monomorphic functions
|
|
struct Instantiation : Substitution
|
|
{
|
|
Instantiation(const TxnLog* log, TypeArena* arena, NotNull<BuiltinTypes> builtinTypes, TypeLevel level, Scope* scope)
|
|
: Substitution(log, arena)
|
|
, builtinTypes(builtinTypes)
|
|
, level(level)
|
|
, scope(scope)
|
|
{
|
|
}
|
|
|
|
NotNull<BuiltinTypes> builtinTypes;
|
|
|
|
TypeLevel level;
|
|
Scope* scope;
|
|
bool ignoreChildren(TypeId ty) override;
|
|
bool isDirty(TypeId ty) override;
|
|
bool isDirty(TypePackId tp) override;
|
|
TypeId clean(TypeId ty) override;
|
|
TypePackId clean(TypePackId tp) override;
|
|
};
|
|
|
|
/** Attempt to instantiate a type. Only used under local type inference.
|
|
*
|
|
* When given a generic function type, instantiate() will return a copy with the
|
|
* generics replaced by fresh types. Instantiation will return the same TypeId
|
|
* back if the function does not have any generics.
|
|
*
|
|
* All higher order generics are left as-is. For example, instantiation of
|
|
* <X>(<Y>(Y) -> (X, Y)) -> (X, Y) is (<Y>(Y) -> ('x, Y)) -> ('x, Y)
|
|
*
|
|
* We substitute the generic X for the free 'x, but leave the generic Y alone.
|
|
*
|
|
* Instantiation fails only when processing the type causes internal recursion
|
|
* limits to be exceeded.
|
|
*/
|
|
std::optional<TypeId> instantiate(NotNull<BuiltinTypes> builtinTypes, NotNull<TypeArena> arena, NotNull<TypeCheckLimits> limits, NotNull<Scope> scope, TypeId ty);
|
|
|
|
} // namespace Luau
|