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//===--- SemaFixture.cpp - Helper for setting up Sema context --------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "SemaFixture.h"
#include "swift/AST/Decl.h"
#include "swift/AST/Import.h"
#include "swift/AST/Module.h"
#include "swift/AST/ParseRequests.h"
#include "swift/AST/SourceFile.h"
#include "swift/AST/Type.h"
#include "swift/AST/Types.h"
#include "swift/Basic/LLVMInitialize.h"
#include "swift/ClangImporter/ClangImporter.h"
#include "swift/Serialization/SerializedModuleLoader.h"
#include "swift/Subsystems.h"
#include "llvm/ADT/DenseMap.h"
using namespace swift;
using namespace swift::unittest;
using namespace swift::constraints::inference;
SemaTest::SemaTest()
: Context(*ASTContext::get(LangOpts, TypeCheckerOpts, SILOpts,
SearchPathOpts, ClangImporterOpts,
SymbolGraphOpts, CASOpts, SourceMgr, Diags)) {
INITIALIZE_LLVM();
registerParseRequestFunctions(Context.evaluator);
registerTypeCheckerRequestFunctions(Context.evaluator);
registerClangImporterRequestFunctions(Context.evaluator);
Context.addModuleLoader(ImplicitSerializedModuleLoader::create(Context));
Context.addModuleLoader(ClangImporter::create(Context), /*isClang=*/true);
auto *stdlib = Context.getStdlibModule(/*loadIfAbsent=*/true);
assert(stdlib && "Failed to load standard library");
auto *module =
ModuleDecl::create(Context.getIdentifier("SemaTests"), Context);
MainFile = new (Context) SourceFile(*module, SourceFileKind::Main,
/*buffer=*/std::nullopt);
AttributedImport<ImportedModule> stdlibImport{{ImportPath::Access(), stdlib},
/*options=*/{}};
MainFile->setImports(stdlibImport);
module->addFile(*MainFile);
DC = module;
}
Type SemaTest::getStdlibType(StringRef name) const {
auto typeName = Context.getIdentifier(name);
auto *stdlib = Context.getStdlibModule();
llvm::SmallVector<ValueDecl *, 4> results;
stdlib->lookupValue(typeName, NLKind::UnqualifiedLookup, results);
if (results.size() != 1)
return Type();
if (auto *decl = dyn_cast<TypeDecl>(results.front())) {
if (auto *NTD = dyn_cast<NominalTypeDecl>(decl))
return NTD->getDeclaredType();
return decl->getDeclaredInterfaceType();
}
return Type();
}
NominalTypeDecl *SemaTest::getStdlibNominalTypeDecl(StringRef name) const {
auto typeName = Context.getIdentifier(name);
auto *stdlib = Context.getStdlibModule();
llvm::SmallVector<ValueDecl *, 4> results;
stdlib->lookupValue(typeName, NLKind::UnqualifiedLookup, results);
if (results.size() != 1)
return nullptr;
return dyn_cast<NominalTypeDecl>(results.front());
}
VarDecl *SemaTest::addExtensionVarMember(NominalTypeDecl *decl,
StringRef name, Type type) const {
auto *ext = ExtensionDecl::create(Context, SourceLoc(), nullptr, { }, DC,
nullptr);
decl->addExtension(ext);
ext->setExtendedNominal(decl);
auto *VD = new (Context) VarDecl(/*isStatic=*/ true, VarDecl::Introducer::Var,
/*nameLoc=*/ SourceLoc(),
Context.getIdentifier(name), ext);
ext->addMember(VD);
auto *pat = new (Context) NamedPattern(VD);
VD->setNamingPattern(pat);
pat->setType(type);
return VD;
}
ProtocolType *SemaTest::createProtocol(llvm::StringRef protocolName,
Type parent) {
auto *PD = new (Context)
ProtocolDecl(DC, SourceLoc(), SourceLoc(),
Context.getIdentifier(protocolName),
/*PrimaryAssociatedTypeNames=*/{},
/*Inherited=*/{},
/*trailingWhere=*/nullptr);
PD->setImplicit();
return ProtocolType::get(PD, parent, Context);
}
BindingSet SemaTest::inferBindings(ConstraintSystem &cs,
TypeVariableType *typeVar) {
llvm::SmallDenseMap<TypeVariableType *, BindingSet> cache;
for (auto *typeVar : cs.getTypeVariables()) {
if (!typeVar->getImpl().hasRepresentativeOrFixed())
cache.insert({typeVar, cs.getBindingsFor(typeVar, /*finalize=*/false)});
}
for (auto *typeVar : cs.getTypeVariables()) {
auto cachedBindings = cache.find(typeVar);
if (cachedBindings == cache.end())
continue;
auto &bindings = cachedBindings->getSecond();
bindings.inferTransitiveProtocolRequirements(cache);
bindings.finalize(cache);
}
auto result = cache.find(typeVar);
assert(result != cache.end());
return result->second;
}
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