luau/Analysis/src/Autocomplete.cpp
Andy Friesen 713ee2ff8b
Sync to upstream/release/678 (#1878)
# What's Changed?

We've been hard at work fixing bugs in the new type solver and getting
it ready to go!

## Native Codegen

* Specialized Luau Codegen instruction for fetching an import.
As a reminder, an import is an expression like `global.thing` and covers
stuff like libraries without fastcalls `coroutine.resume`) and atomic
extern libraries.

## New Type Solver

* Fix an issue that prevented eager generalization from working properly
with OO styled code.
* Avoid copying uninitialized memory in Luau attribute parsing
* Improve type inference of unsealed tables.
    * This fixes https://github.com/luau-lang/luau/issues/1838
    * and https://github.com/luau-lang/luau/issues/1859
* Infer potential singleton string keys in autocomplete when the
expected index type is a union type.
* Avoid creating cyclic types when reducing types of the form `t1 where
t1 = refine<T, t1, Y>`
* The type cloner now does the same thing for the new and old solvers.
* Properly infer polarity (aka variance) for divergent table properties.
(ie tables whose read type and write type are not the same)
* Crash fixes.

---------

Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com>
Co-authored-by: Varun Saini <61795485+vrn-sn@users.noreply.github.com>
Co-authored-by: Alexander Youngblood <ayoungblood@roblox.com>
Co-authored-by: Menarul Alam <malam@roblox.com>
Co-authored-by: Aviral Goel <agoel@roblox.com>
Co-authored-by: Vighnesh <vvijay@roblox.com>
Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
Co-authored-by: Ariel Weiss <aaronweiss@roblox.com>
2025-06-13 09:36:35 -07:00

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1.7 KiB
C++

// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Luau/Autocomplete.h"
#include "Luau/AstQuery.h"
#include "Luau/TimeTrace.h"
#include "Luau/TypeArena.h"
#include "Luau/Module.h"
#include "Luau/Frontend.h"
#include "AutocompleteCore.h"
LUAU_FASTFLAG(LuauSolverV2)
namespace Luau
{
AutocompleteResult autocomplete(Frontend& frontend, const ModuleName& moduleName, Position position, StringCompletionCallback callback)
{
LUAU_TIMETRACE_SCOPE("Luau::autocomplete", "Autocomplete");
LUAU_TIMETRACE_ARGUMENT("name", moduleName.c_str());
const SourceModule* sourceModule = frontend.getSourceModule(moduleName);
if (!sourceModule)
return {};
ModulePtr module;
if (FFlag::LuauSolverV2)
module = frontend.moduleResolver.getModule(moduleName);
else
module = frontend.moduleResolverForAutocomplete.getModule(moduleName);
if (!module)
return {};
NotNull<BuiltinTypes> builtinTypes = frontend.builtinTypes;
Scope* globalScope;
if (FFlag::LuauSolverV2)
globalScope = frontend.globals.globalScope.get();
else
globalScope = frontend.globalsForAutocomplete.globalScope.get();
TypeArena typeArena;
if (isWithinComment(*sourceModule, position))
return {};
std::vector<AstNode*> ancestry = findAncestryAtPositionForAutocomplete(*sourceModule, position);
LUAU_ASSERT(!ancestry.empty());
ScopePtr startScope = findScopeAtPosition(*module, position);
return autocomplete_(module, builtinTypes, &typeArena, ancestry, globalScope, startScope, position, frontend.fileResolver, std::move(callback));
}
} // namespace Luau