Refactor for new solver

.github/workflows/ci.yml

@@ -53,9 +53,12 @@ jobs:
           cmake ..
           cmake --build . --target Luau.LanguageServer.Test -j 3
 
-      - name: Run Tests
+      - name: Run Tests (Old Solver)
         run: ${{ matrix.test-path }}
 
+      - name: Run Tests (New Solver)
+        run: ${{ matrix.test-path }} --new-solver
+
   types_smoketest:
     name: Types Smoketest
     runs-on: ubuntu-20.04

.gitignore

@@ -1,6 +1,7 @@
 /build
 .vscode/settings.json
 /.vs
+out/
 .cache
 .idea
 .DS_Store

CHANGELOG.md

@@ -10,6 +10,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Sync to upstream Luau 0.650
 
+### Fixed
+
+- Fixed autocompletion, type registration, hover types/documentation, and some crashes for cases where the new solver is enabled
+
 ## [1.34.0] - 2024-10-27
 
 ### Changed
@@ -117,7 +121,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Changed
 
 - Sync to upstream Luau 0.632
-- Language clients are recommended to send configuration during intializationOptions (see https://github.com/JohnnyMorganz/luau-lsp/blob/main/editors/README.md for details)
+- Language clients are recommended to send configuration during intializationOptions (see <https://github.com/JohnnyMorganz/luau-lsp/blob/main/editors/README.md> for details)
 - Removed need for postponing requests whilst waiting for platform configuration (relies on clients sending config in intializationOptions)
 
 ### Fixed
@@ -150,7 +154,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Changed
 
 - Sync to upstream Luau 0.631
-- An indexed expression will no longer show an inlay hint if the index matches the parameter name (i.e., `call(other.value)` won't add `value: ` inlay hint) ([#618](https://github.com/JohnnyMorganz/luau-lsp/issues/618))
+- An indexed expression will no longer show an inlay hint if the index matches the parameter name (i.e., `call(other.value)` won't add `value:` inlay hint) ([#618](https://github.com/JohnnyMorganz/luau-lsp/issues/618))
 - Studio Plugin will now perform Gzip compression on sent requests
 
 ### Fixed
@@ -182,7 +186,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Sync to upstream Luau 0.625
 - Improved memory usage of document and workspace diagnostics by no longer storing type graphs
-- Rewritten the Luau grammar syntax: https://github.com/JohnnyMorganz/Luau.tmLanguage
+- Rewritten the Luau grammar syntax: <https://github.com/JohnnyMorganz/Luau.tmLanguage>
 
 ### Fixed
 
@@ -604,7 +608,7 @@ local DATA = {
 
 --- Doc comment
 type Contents = {
-	...
+ ...
 }
 ```
 
@@ -763,7 +767,7 @@ local y = tbl.data -- Should give "This is some special information"
 - Provide autocomplete for class names in `Instance:IsA("ClassName")` and errors when ClassName is unknown
 - Provide autocomplete for properties in `Instance:GetPropertyChangedSignal("Property")` and errors when Property is unknown
 - Provide autocomplete for enums in `EnumItem:IsA("enum")` and errors when Enum is unknown
-- Added support for moonwave-style documentation comments! Currently only supports comments attached to functions directly. See https://eryn.io/moonwave for how to write doc comments
+- Added support for moonwave-style documentation comments! Currently only supports comments attached to functions directly. See <https://eryn.io/moonwave> for how to write doc comments
 - Added command line flag `--ignore=GLOB` to `luau-lsp analyze` allowing you to provide glob patterns to ignore diagnostics, similar to `luau-lsp.ignoreGlobs`. Repeat the flag multiple times for multiple patterns
 
 ### Changed
@@ -981,7 +985,7 @@ local y = tbl.data -- Should give "This is some special information"
 - Fixed regression where diagnostics are not cleared when you close an ignored file
 - Fixed errors sometimes occuring when you index `script`/`workspace`/`game` for children
 - Fixed internal error caused by `:Clone()` calls when called on an expression which isn't an Lvalue (e.g., `inst:FindFirstChild(name):Clone()`)
-- Fixed bug where `_: ` would not be removed as the name of function arguments. `function foo(_: number, _: number)` will now show as `function foo(number, number)`
+- Fixed bug where `_:` would not be removed as the name of function arguments. `function foo(_: number, _: number)` will now show as `function foo(number, number)`
 - Fixed analyze mode not exiting with a non-zero exit code when there are errors
 - Fixed excessive whitespace in document symbols for expr-named function defintions
 - Fixed hover for global functions and local variables
@@ -1147,7 +1151,7 @@ local y = tbl.data -- Should give "This is some special information"
 
 - Hover over definitions will now try to give more expressive types
 - `self` will now no longer show up in hover/signature help if it has already been implicitly provided
-- `_: ` will no longer show up in hover/signature help for unnamed function parameters
+- `_:` will no longer show up in hover/signature help for unnamed function parameters
 
 ### Fixed
 

src/AnalyzeCli.cpp

@@ -22,6 +22,7 @@
 #include <vector>
 
 LUAU_FASTFLAG(DebugLuauTimeTracing)
+LUAU_FASTFLAG(LuauSolverV2)
 
 enum class ReportFormat
 {
@@ -174,7 +175,7 @@ int startAnalyze(const argparse::ArgumentParser& program)
             if (std::filesystem::is_directory(path))
             {
                 for (std::filesystem::recursive_directory_iterator next(path, std::filesystem::directory_options::skip_permission_denied), end;
-                     next != end; ++next)
+                    next != end; ++next)
                 {
                     try
                     {
@@ -307,8 +308,9 @@ int startAnalyze(const argparse::ArgumentParser& program)
 
     Luau::Frontend frontend(&fileResolver, &fileResolver, frontendOptions);
 
-    Luau::registerBuiltinGlobals(frontend, frontend.globals, /* typeCheckForAutocomplete = */ false);
-    Luau::registerBuiltinGlobals(frontend, frontend.globalsForAutocomplete, /* typeCheckForAutocomplete = */ true);
+    Luau::registerBuiltinGlobals(frontend, frontend.globals);
+    if (!FFlag::LuauSolverV2)
+        Luau::registerBuiltinGlobals(frontend, frontend.globalsForAutocomplete);
 
     for (auto& definitionsPath : definitionsPaths)
     {
@@ -325,7 +327,7 @@ int startAnalyze(const argparse::ArgumentParser& program)
             return 1;
         }
 
-        auto loadResult = types::registerDefinitions(frontend, frontend.globals, *definitionsContents, /* typeCheckForAutocomplete = */ false);
+        auto loadResult = types::registerDefinitions(frontend, frontend.globals, *definitionsContents);
         if (!loadResult.success)
         {
             fprintf(stderr, "Failed to load definitions\n");
@@ -359,8 +361,9 @@ int startAnalyze(const argparse::ArgumentParser& program)
             {
                 robloxPlatform->updateSourceNodeMap(sourceMapContents.value());
 
-                robloxPlatform->handleSourcemapUpdate(
-                    frontend, frontend.globals, !program.is_used("--no-strict-dm-types") && client.configuration.diagnostics.strictDatamodelTypes);
+                bool expressiveTypes =
+                    (program.is_used("--no-strict-dm-types") && client.configuration.diagnostics.strictDatamodelTypes) || FFlag::LuauSolverV2;
+                robloxPlatform->handleSourcemapUpdate(frontend, frontend.globals, expressiveTypes);
             }
         }
         else
@@ -371,7 +374,8 @@ int startAnalyze(const argparse::ArgumentParser& program)
     }
 
     Luau::freeze(frontend.globals.globalTypes);
-    Luau::freeze(frontend.globalsForAutocomplete.globalTypes);
+    if (!FFlag::LuauSolverV2)
+        Luau::freeze(frontend.globalsForAutocomplete.globalTypes);
 
     int failed = 0;
 

src/LuauExt.cpp

@@ -1,5 +1,7 @@
+#include <optional>
 #include <utility>
 
+#include "Luau/Type.h"
 #include "Platform/LSPPlatform.hpp"
 #include "Luau/BuiltinDefinitions.h"
 #include "Luau/ToString.h"
@@ -51,11 +53,10 @@ std::optional<nlohmann::json> parseDefinitionsFileMetadata(const std::string& de
     return std::nullopt;
 }
 
-Luau::LoadDefinitionFileResult registerDefinitions(
-    Luau::Frontend& frontend, Luau::GlobalTypes& globals, const std::string& definitions, bool typeCheckForAutocomplete)
+Luau::LoadDefinitionFileResult registerDefinitions(Luau::Frontend& frontend, Luau::GlobalTypes& globals, const std::string& definitions)
 {
     // TODO: packageName shouldn't just be "@roblox"
-    return frontend.loadDefinitionFile(globals, globals.globalScope, definitions, "@roblox", /* captureComments = */ false, typeCheckForAutocomplete);
+    return frontend.loadDefinitionFile(globals, globals.globalScope, definitions, "@roblox", /* captureComments = */ false);
 }
 
 using NameOrExpr = std::variant<std::string, Luau::AstExpr*>;

src/Workspace.cpp

@@ -285,10 +285,12 @@ void WorkspaceFolder::registerTypes()
 {
     LUAU_TIMETRACE_SCOPE("WorkspaceFolder::initialize", "LSP");
     client->sendTrace("workspace initialization: registering Luau globals");
-    Luau::registerBuiltinGlobals(frontend, frontend.globals, /* typeCheckForAutocomplete = */ false);
-    Luau::registerBuiltinGlobals(frontend, frontend.globalsForAutocomplete, /* typeCheckForAutocomplete = */ true);
+    Luau::registerBuiltinGlobals(frontend, frontend.globals);
+    if (!FFlag::LuauSolverV2)
+        Luau::registerBuiltinGlobals(frontend, frontend.globalsForAutocomplete);
 
-    Luau::attachTag(Luau::getGlobalBinding(frontend.globalsForAutocomplete, "require"), "Require");
+    auto& tagRegisterGlobals = FFlag::LuauSolverV2 ? frontend.globals : frontend.globalsForAutocomplete;
+    Luau::attachTag(Luau::getGlobalBinding(tagRegisterGlobals, "require"), "Require");
 
     if (client->definitionsFiles.empty())
         client->sendLogMessage(lsp::MessageType::Warning, "No definitions file provided by client");
@@ -314,8 +316,9 @@ void WorkspaceFolder::registerTypes()
         client->sendTrace("workspace initialization: parsing definitions file metadata COMPLETED", json(definitionsFileMetadata).dump());
 
         client->sendTrace("workspace initialization: registering types definition");
-        auto result = types::registerDefinitions(frontend, frontend.globals, *definitionsContents, /* typeCheckForAutocomplete = */ false);
-        types::registerDefinitions(frontend, frontend.globalsForAutocomplete, *definitionsContents, /* typeCheckForAutocomplete = */ true);
+        auto result = types::registerDefinitions(frontend, frontend.globals, *definitionsContents);
+        if (!FFlag::LuauSolverV2)
+            types::registerDefinitions(frontend, frontend.globalsForAutocomplete, *definitionsContents);
         client->sendTrace("workspace initialization: registering types definition COMPLETED");
 
         client->sendTrace("workspace: applying platform mutations on definitions");
@@ -347,7 +350,8 @@ void WorkspaceFolder::registerTypes()
         }
     }
     Luau::freeze(frontend.globals.globalTypes);
-    Luau::freeze(frontend.globalsForAutocomplete.globalTypes);
+    if (!FFlag::LuauSolverV2)
+        Luau::freeze(frontend.globalsForAutocomplete.globalTypes);
 }
 
 void WorkspaceFolder::setupWithConfiguration(const ClientConfiguration& configuration)

src/include/LSP/LuauExt.hpp

@@ -18,8 +18,7 @@ bool isMetamethod(const Luau::Name& name);
 
 std::optional<nlohmann::json> parseDefinitionsFileMetadata(const std::string& definitions);
 
-Luau::LoadDefinitionFileResult registerDefinitions(
-    Luau::Frontend& frontend, Luau::GlobalTypes& globals, const std::string& definitions, bool typeCheckForAutocomplete = false);
+Luau::LoadDefinitionFileResult registerDefinitions(Luau::Frontend& frontend, Luau::GlobalTypes& globals, const std::string& definitions);
 
 using NameOrExpr = std::variant<std::string, Luau::AstExpr*>;
 

src/operations/Completion.cpp

@@ -13,6 +13,8 @@
 #include "LSP/LuauExt.hpp"
 #include "LSP/DocumentationParser.hpp"
 
+LUAU_FASTFLAG(LuauSolverV2)
+
 void WorkspaceFolder::endAutocompletion(const lsp::CompletionParams& params)
 {
     auto moduleName = fileResolver.getModuleName(params.textDocument.uri);
@@ -256,8 +258,8 @@ static const char* sortText(const Luau::Frontend& frontend, const std::string& n
         return SortText::AutoImports;
 
     // If the entry is `loadstring`, deprioritise it
-    if (auto it = frontend.globalsForAutocomplete.globalScope->bindings.find(Luau::AstName("loadstring"));
-        it != frontend.globalsForAutocomplete.globalScope->bindings.end())
+    auto& completionGlobals = FFlag::LuauSolverV2 ? frontend.globals : frontend.globalsForAutocomplete;
+    if (auto it = completionGlobals.globalScope->bindings.find(Luau::AstName("loadstring")); it != completionGlobals.globalScope->bindings.end())
     {
         if (entry.type == it->second.typeId)
             return SortText::Deprioritized;
@@ -371,10 +373,11 @@ std::optional<std::string> WorkspaceFolder::getDocumentationForAutocompleteEntry
                 if (parentTy)
                 {
                     // parentTy might be an intersected type, find the actual base ttv
-                    if (auto propInformation = lookupProp(*parentTy, name))
+                    auto followedTy = Luau::follow(*parentTy);
+                    if (auto propInformation = lookupProp(followedTy, name))
                         definitionModuleName = Luau::getDefinitionModuleName(propInformation->first);
                     else
-                        definitionModuleName = Luau::getDefinitionModuleName(*parentTy);
+                        definitionModuleName = Luau::getDefinitionModuleName(followedTy);
                 }
             }
         }

src/platform/roblox/RobloxCompletion.cpp

@@ -3,6 +3,8 @@
 #include "LSP/Completion.hpp"
 #include "LSP/Workspace.hpp"
 
+LUAU_FASTFLAG(LuauSolverV2)
+
 static constexpr const char* COMMON_SERVICES[] = {
     "Players",
     "ReplicatedStorage",
@@ -254,7 +256,8 @@ const char* RobloxPlatform::handleSortText(
             return SortText::PrioritisedSuggestion;
 
     // If calling a property on ServiceProvider, then prioritise these properties
-    if (auto dataModelType = frontend.globalsForAutocomplete.globalScope->lookupType("ServiceProvider");
+    auto& completionGlobals = FFlag::LuauSolverV2 ? frontend.globals : frontend.globalsForAutocomplete;
+    if (auto dataModelType = completionGlobals.globalScope->lookupType("ServiceProvider");
         dataModelType && Luau::get<Luau::ClassType>(dataModelType->type) && entry.containingClass &&
         Luau::isSubclass(entry.containingClass.value(), Luau::get<Luau::ClassType>(dataModelType->type)) && !entry.wrongIndexType)
     {
@@ -264,9 +267,9 @@ const char* RobloxPlatform::handleSortText(
     }
 
     // If calling a property on an Instance, then prioritise these properties
-    else if (auto instanceType = frontend.globalsForAutocomplete.globalScope->lookupType("Instance");
-             instanceType && Luau::get<Luau::ClassType>(instanceType->type) && entry.containingClass &&
-             Luau::isSubclass(entry.containingClass.value(), Luau::get<Luau::ClassType>(instanceType->type)) && !entry.wrongIndexType)
+    else if (auto instanceType = completionGlobals.globalScope->lookupType("Instance");
+        instanceType && Luau::get<Luau::ClassType>(instanceType->type) && entry.containingClass &&
+        Luau::isSubclass(entry.containingClass.value(), Luau::get<Luau::ClassType>(instanceType->type)) && !entry.wrongIndexType)
     {
         if (auto it = std::find(std::begin(COMMON_INSTANCE_PROPERTIES), std::end(COMMON_INSTANCE_PROPERTIES), name);
             it != std::end(COMMON_INSTANCE_PROPERTIES))