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TypeReconstruction.cpp
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TypeReconstruction.cpp
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//===--- TypeReconstruction.cpp -------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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 "swift/IDE/Utils.h"
#include "swift/AST/ASTContext.h"
#include "swift/AST/Decl.h"
#include "swift/AST/GenericSignature.h"
#include "swift/AST/NameLookup.h"
#include "swift/AST/Types.h"
#include "swift/AST/SubstitutionMap.h"
#include "swift/Demangling/Demangle.h"
#include "swift/Demangling/ManglingMacros.h"
#include "swift/ClangImporter/ClangImporter.h"
#include "swift/Strings.h"
#include <cstdio>
#include <cstdarg>
#include <mutex> // std::once
using namespace swift;
// FIXME: replace with std::string and StringRef as appropriate to each case.
using ConstString = const std::string;
static std::string stringWithFormat(const char *fmt_str, ...) {
int final_n, n = ((int)strlen(fmt_str)) * 2;
std::string str;
std::unique_ptr<char[]> formatted;
va_list ap;
while (1) {
formatted.reset(new char[n]);
strcpy(&formatted[0], fmt_str);
va_start(ap, fmt_str);
final_n = vsnprintf(&formatted[0], n, fmt_str, ap);
va_end(ap);
if (final_n < 0 || final_n >= n)
n += abs(final_n - n + 1);
else
break;
}
return std::string(formatted.get());
}
static bool
CompareFunctionTypes(const AnyFunctionType *f, const AnyFunctionType *g,
Optional<std::vector<StringRef>> fLabels = None,
Optional<std::vector<StringRef>> gLabels = None,
bool *input_matches = nullptr,
bool *output_matches = nullptr);
static Optional<ClangTypeKind>
GetClangTypeKindFromSwiftKind(DeclKind decl_kind) {
Optional<ClangTypeKind> clangTypeKind;
switch (decl_kind) {
case DeclKind::Class:
return ClangTypeKind::ObjCClass;
case DeclKind::Protocol:
return ClangTypeKind::ObjCProtocol;
case DeclKind::TypeAlias:
return ClangTypeKind::Typedef;
case DeclKind::Struct:
return ClangTypeKind::Tag;
default:
return None;
}
}
class DeclsLookupSource {
public:
using ValueDecls = SmallVectorImpl<ValueDecl *>;
private:
class VisibleDeclsConsumer : public VisibleDeclConsumer {
private:
std::vector<ValueDecl *> m_decls;
public:
void foundDecl(ValueDecl *VD, DeclVisibilityKind Reason) override {
m_decls.push_back(VD);
}
~VisibleDeclsConsumer() override = default;
explicit operator bool() { return !m_decls.empty(); }
decltype(m_decls)::const_iterator begin() { return m_decls.begin(); }
decltype(m_decls)::const_iterator end() { return m_decls.end(); }
};
bool lookupQualified(ModuleDecl *entry, DeclBaseName name, NLOptions options,
LazyResolver *typeResolver, ValueDecls &decls) {
if (!entry)
return false;
size_t decls_size = decls.size();
entry->lookupQualified(entry, name, options, decls);
return decls.size() > decls_size;
}
bool lookupValue(ModuleDecl *entry, DeclBaseName name,
ModuleDecl::AccessPathTy accessPath, NLKind lookupKind,
ValueDecls &decls) {
if (!entry)
return false;
size_t decls_size = decls.size();
entry->lookupValue(accessPath, name, lookupKind, decls);
return decls.size() > decls_size;
}
public:
enum class LookupKind {
SwiftModule,
ClangImporter,
Decl,
Extension,
Invalid
};
using PrivateDeclIdentifier = Optional<std::string>;
static DeclsLookupSource
GetDeclsLookupSource(ASTContext &ast, ConstString module_name,
bool allow_clang_importer = true) {
assert(!module_name.empty());
static ConstString g_ObjectiveCModule(MANGLING_MODULE_OBJC);
static ConstString g_BuiltinModule(BUILTIN_NAME);
static ConstString g_CModule(MANGLING_MODULE_CLANG_IMPORTER);
if (allow_clang_importer) {
if (module_name == g_ObjectiveCModule || module_name == g_CModule)
return DeclsLookupSource(&ast, module_name);
}
ModuleDecl *module = module_name == g_BuiltinModule
? ast.TheBuiltinModule
: ast.getModuleByName(module_name);
if (module == nullptr)
return DeclsLookupSource();
return DeclsLookupSource(module);
}
static DeclsLookupSource GetDeclsLookupSource(NominalTypeDecl *decl) {
assert(decl);
return DeclsLookupSource(decl);
}
static DeclsLookupSource GetDeclsLookupSource(DeclsLookupSource source,
NominalTypeDecl *decl) {
assert(source._type == LookupKind::SwiftModule);
assert(source._module);
assert(decl);
return DeclsLookupSource(source._module, decl);
}
void lookupByMangledName(DeclBaseName name, DeclKind decl_kind,
ValueDecls &result) {
if (_type == LookupKind::ClangImporter) {
ASTContext *ast_ctx = _clang_crawler._ast;
if (ast_ctx) {
ClangImporter *swift_clang_importer =
(ClangImporter *)ast_ctx->getClangModuleLoader();
if (!swift_clang_importer)
return;
Optional<ClangTypeKind> clangTypeKind =
GetClangTypeKindFromSwiftKind(decl_kind);
if (clangTypeKind) {
swift_clang_importer->lookupTypeDecl(name.getIdentifier().str(),
clangTypeKind.getValue(),
[&](TypeDecl *type_decl) {
result.push_back(type_decl);
});
return;
} else {
VisibleDeclsConsumer consumer;
swift_clang_importer->lookupValue(name, consumer);
auto iter = consumer.begin(), end = consumer.end();
while (iter != end) {
result.push_back(*iter);
iter++;
}
return;
}
}
} else if (_type == LookupKind::SwiftModule) {
lookupQualified(_module, name, NLOptions(), /*typeResolver*/nullptr,
result);
}
return;
}
void lookupRelatedEntity(StringRef name, StringRef related_entity_kind,
DeclKind decl_kind, ValueDecls &result) {
switch (_type) {
case LookupKind::ClangImporter: {
ASTContext *ast_ctx = _clang_crawler._ast;
if (!ast_ctx)
return;
ClangImporter *swift_clang_importer =
(ClangImporter *)ast_ctx->getClangModuleLoader();
if (!swift_clang_importer)
return;
Optional<ClangTypeKind> clang_kind =
GetClangTypeKindFromSwiftKind(decl_kind);
if (!clang_kind)
return;
swift_clang_importer->lookupRelatedEntity(name, clang_kind.getValue(),
related_entity_kind,
[&](TypeDecl *found) {
result.push_back(found);
});
return;
}
case LookupKind::SwiftModule:
case LookupKind::Decl:
case LookupKind::Extension:
return;
case LookupKind::Invalid:
return;
}
}
void lookupValue(ModuleDecl::AccessPathTy path, DeclBaseName name, NLKind kind,
ValueDecls &result) {
if (_type == LookupKind::ClangImporter) {
ASTContext *ast_ctx = _clang_crawler._ast;
if (ast_ctx) {
VisibleDeclsConsumer consumer;
ClangImporter *swift_clang_importer =
(ClangImporter *)ast_ctx->getClangModuleLoader();
if (!swift_clang_importer)
return;
swift_clang_importer->lookupValue(name, consumer);
if (consumer) {
auto iter = consumer.begin(), end = consumer.end();
while (iter != end) {
result.push_back(*iter);
iter++;
}
return;
}
}
} else if (_type == LookupKind::SwiftModule)
_module->lookupValue(path, name, kind, result);
else if (_type == LookupKind::Extension) {
auto results = _extension._decl->lookupDirect(DeclName(name));
result.append(results.begin(), results.end());
}
return;
}
void lookupMember(DeclName id, Identifier priv_decl_id, ValueDecls &result) {
if (_type == LookupKind::Decl)
return lookupMember(_decl, id, priv_decl_id, result);
if (_type == LookupKind::SwiftModule)
return lookupMember(_module, id, priv_decl_id, result);
if (_type == LookupKind::Extension)
return lookupMember(_extension._decl, id, priv_decl_id, result);
return;
}
void lookupMember(DeclContext *decl_ctx, DeclName id, Identifier priv_decl_id,
ValueDecls &result) {
if (_type == LookupKind::Decl)
_decl->getModuleContext()->lookupMember(result, decl_ctx, id,
priv_decl_id);
else if (_type == LookupKind::SwiftModule)
_module->lookupMember(result, decl_ctx, id, priv_decl_id);
else if (_type == LookupKind::Extension)
_extension._module->lookupMember(result, decl_ctx, id, priv_decl_id);
return;
}
TypeDecl *lookupLocalType(StringRef key) {
switch (_type) {
case LookupKind::SwiftModule:
return _module->lookupLocalType(key);
case LookupKind::Decl:
return _decl->getModuleContext()->lookupLocalType(key);
case LookupKind::Extension:
return _extension._module->lookupLocalType(key);
case LookupKind::Invalid:
return nullptr;
case LookupKind::ClangImporter:
return nullptr;
}
llvm_unreachable("Unhandled LookupKind in switch.");
}
ConstString GetName() const {
switch (_type) {
case LookupKind::Invalid:
return ConstString("Invalid");
case LookupKind::ClangImporter:
return ConstString("ClangImporter");
case LookupKind::SwiftModule:
return ConstString(_module->getName().get());
case LookupKind::Decl:
return ConstString(_decl->getName().get());
case LookupKind::Extension:
SmallString<64> builder;
builder.append("ext ");
builder.append(_extension._decl->getNameStr());
builder.append(" in ");
builder.append(_module->getNameStr());
return builder.str();
}
llvm_unreachable("Unhandled LookupKind in switch.");
}
~DeclsLookupSource() {}
DeclsLookupSource(const DeclsLookupSource &rhs) : _type(rhs._type) {
switch (_type) {
case LookupKind::Invalid:
break;
case LookupKind::ClangImporter:
_clang_crawler._ast = rhs._clang_crawler._ast;
break;
case LookupKind::SwiftModule:
_module = rhs._module;
break;
case LookupKind::Decl:
_decl = rhs._decl;
_extension._decl = rhs._extension._decl;
_extension._module = rhs._extension._module;
break;
case LookupKind::Extension:
_extension._decl = rhs._extension._decl;
_extension._module = rhs._extension._module;
break;
}
}
DeclsLookupSource &operator=(const DeclsLookupSource &rhs) {
if (this != &rhs) {
_type = rhs._type;
switch (_type) {
case LookupKind::Invalid:
break;
case LookupKind::ClangImporter:
_clang_crawler._ast = rhs._clang_crawler._ast;
break;
case LookupKind::SwiftModule:
_module = rhs._module;
break;
case LookupKind::Decl:
_decl = rhs._decl;
_extension._decl = rhs._extension._decl;
_extension._module = rhs._extension._module;
break;
case LookupKind::Extension:
_extension._decl = rhs._extension._decl;
_extension._module = rhs._extension._module;
break;
}
}
return *this;
}
void Clear() {
// no need to explicitly clean either pointer
_type = LookupKind::Invalid;
}
DeclsLookupSource() : _type(LookupKind::Invalid), _module(nullptr) {}
operator bool() {
switch (_type) {
case LookupKind::Invalid:
return false;
case LookupKind::ClangImporter:
return _clang_crawler._ast != nullptr;
case LookupKind::SwiftModule:
return _module != nullptr;
case LookupKind::Decl:
return _decl != nullptr;
case LookupKind::Extension:
return (_extension._decl != nullptr) && (_extension._module != nullptr);
}
llvm_unreachable("Unhandled LookupKind in switch.");
}
bool IsExtension() {
return (this->operator bool()) && (_type == LookupKind::Extension);
}
NominalTypeDecl *GetExtendedDecl() {
assert(IsExtension());
return _extension._decl;
}
private:
LookupKind _type;
union {
ModuleDecl *_module;
struct {
ASTContext *_ast;
} _clang_crawler;
NominalTypeDecl *_decl;
struct {
ModuleDecl *_module; // extension in this module
NominalTypeDecl *_decl; // for this type
} _extension;
};
DeclsLookupSource(ModuleDecl *_m) {
if (_m) {
_module = _m;
_type = LookupKind::SwiftModule;
} else
_type = LookupKind::Invalid;
}
DeclsLookupSource(ASTContext *_a, ConstString _m) {
// it is fine for the ASTContext to be null, so don't actually even
// lldbassert there
if (_a) {
_clang_crawler._ast = _a;
_type = LookupKind::ClangImporter;
} else
_type = LookupKind::Invalid;
}
DeclsLookupSource(NominalTypeDecl *_d) {
if (_d) {
_decl = _d;
_type = LookupKind::Decl;
} else
_type = LookupKind::Invalid;
}
DeclsLookupSource(ModuleDecl *_m, NominalTypeDecl *_d) {
if (_m && _d) {
_extension._decl = _d;
_extension._module = _m;
_type = LookupKind::Extension;
} else
_type = LookupKind::Invalid;
}
};
struct VisitNodeResult {
DeclsLookupSource _module;
std::vector<Decl *> _decls;
std::vector<Type> _types;
TupleTypeElt _tuple_type_element;
std::string _error;
VisitNodeResult()
: _module(), _decls(), _types(), _tuple_type_element(), _error() {}
bool HasSingleType() { return _types.size() == 1 && _types.front(); }
void Clear() {
_module.Clear();
_decls.clear();
_types.clear();
_tuple_type_element = TupleTypeElt();
_error.clear();
}
};
static Identifier
GetIdentifier(ASTContext *ast,
const DeclsLookupSource::PrivateDeclIdentifier &priv_decl_id) {
do {
if (!ast)
break;
if (!priv_decl_id.hasValue())
break;
return ast->getIdentifier(priv_decl_id.getValue().c_str());
} while (false);
return Identifier();
}
static bool FilterDeclsForKind(DeclKind decl_kind,
ArrayRef<swift::ValueDecl *> decls,
VisitNodeResult &result) {
for (auto decl : decls) {
// Note: Clang nodes are filtered ahead of time based on their Clang decl
// kind.
if (decl->getKind() != decl_kind && !decl->hasClangNode())
continue;
result._decls = {decl};
Type decl_type;
if (decl->hasInterfaceType()) {
decl_type = decl->getInterfaceType();
MetatypeType *meta_type = decl_type->getAs<MetatypeType>();
if (meta_type)
decl_type = meta_type->getInstanceType();
}
result._types = {decl_type};
return true;
}
return false;
}
static bool FindFirstNamedDeclWithKind(
ASTContext *ast, const DeclBaseName &name, DeclKind decl_kind,
VisitNodeResult &result,
DeclsLookupSource::PrivateDeclIdentifier priv_decl_id =
DeclsLookupSource::PrivateDeclIdentifier())
{
if (!result._decls.empty()) {
Decl *parent_decl = result._decls.back();
if (parent_decl) {
auto nominal_decl = dyn_cast<NominalTypeDecl>(parent_decl);
if (nominal_decl) {
DeclsLookupSource lookup(
DeclsLookupSource::GetDeclsLookupSource(nominal_decl));
SmallVector<ValueDecl *, 4> decls;
lookup.lookupMember(name, GetIdentifier(ast, priv_decl_id), decls);
if (FilterDeclsForKind(decl_kind, decls, result))
return true;
}
}
} else if (result._module) {
SmallVector<ValueDecl *, 4> decls;
if (priv_decl_id)
result._module.lookupMember(name, GetIdentifier(ast, priv_decl_id),
decls);
else
result._module.lookupByMangledName(name, decl_kind, decls);
if (FilterDeclsForKind(decl_kind, decls, result))
return true;
}
result.Clear();
result._error = "Generic Error";
return false;
}
static size_t
FindNamedDecls(ASTContext *ast, const DeclBaseName &name, VisitNodeResult &result,
DeclsLookupSource::PrivateDeclIdentifier priv_decl_id =
DeclsLookupSource::PrivateDeclIdentifier()) {
if (!result._decls.empty()) {
Decl *parent_decl = result._decls.back();
result._decls.clear();
result._types.clear();
if (parent_decl) {
if (auto nominal_decl = dyn_cast<NominalTypeDecl>(parent_decl)) {
DeclsLookupSource lookup(
DeclsLookupSource::GetDeclsLookupSource(nominal_decl));
SmallVector<ValueDecl *, 4> decls;
lookup.lookupMember(name, GetIdentifier(ast, priv_decl_id), decls);
if (decls.empty()) {
result._error = stringWithFormat(
"no decl found in '%s' (DeclKind=%u)",
name.userFacingName().str().c_str(),
nominal_decl->getName().get(), (uint32_t)nominal_decl->getKind());
} else {
for (ValueDecl *decl : decls) {
if (decl->hasInterfaceType()) {
result._decls.push_back(decl);
Type decl_type;
decl_type = decl->getInterfaceType();
MetatypeType *meta_type = decl_type->getAs<MetatypeType>();
if (meta_type)
decl_type = meta_type->getInstanceType();
result._types.push_back(decl_type);
}
}
return result._types.size();
}
} else if (auto FD = dyn_cast<AbstractFunctionDecl>(parent_decl)) {
// FIXME: We should not end up here at all. For some reason we're trying
// to look up members of a local type inside the parent context of the
// local type.
//
// This code path is broken and is about to be replaced.
if (name.isSpecial())
return result._decls.size();
// Do a local lookup into the function, using the end loc to approximate
// being able to see all the local variables.
// FIXME: Need a more complete/robust lookup mechanism that can handle
// declarations in sub-stmts, etc.
UnqualifiedLookup lookup(name, FD, ast->getLazyResolver(),
FD->getEndLoc());
if (!lookup.isSuccess()) {
result._error = "no decl found in function";
} else {
for (auto decl : lookup.Results) {
auto *VD = decl.getValueDecl();
result._decls.push_back(VD);
result._types.push_back(VD->getInterfaceType());
}
}
return result._decls.size();
} else {
result._error = stringWithFormat(
"decl is not a nominal_decl (DeclKind=%u), lookup for '%s' failed",
(uint32_t)parent_decl->getKind(),
name.userFacingName().str().c_str());
}
}
} else if (result._module) {
ModuleDecl::AccessPathTy access_path;
SmallVector<ValueDecl *, 4> decls;
if (priv_decl_id)
result._module.lookupMember(
name, ast->getIdentifier(priv_decl_id.getValue().c_str()), decls);
else
result._module.lookupValue(access_path, name, NLKind::QualifiedLookup,
decls);
if (decls.empty()) {
result._error =
stringWithFormat("no decl named '%s' found in module '%s'",
name.userFacingName().str().c_str(),
result._module.GetName().data());
} else {
for (auto decl : decls) {
if (decl->hasInterfaceType()) {
result._decls.push_back(decl);
result._types.push_back(decl->getInterfaceType());
MetatypeType *meta_type =
result._types.back()->getAs<MetatypeType>();
if (meta_type)
result._types.back() = meta_type->getInstanceType();
}
}
return result._types.size();
}
}
result.Clear();
result._error = "Generic error.";
return false;
}
static DeclKind GetKindAsDeclKind(Demangle::Node::Kind node_kind) {
switch (node_kind) {
case Demangle::Node::Kind::TypeAlias:
return DeclKind::TypeAlias;
case Demangle::Node::Kind::Structure:
return DeclKind::Struct;
case Demangle::Node::Kind::Class:
return DeclKind::Class;
case Demangle::Node::Kind::Allocator:
return DeclKind::Constructor;
case Demangle::Node::Kind::Function:
return DeclKind::Func;
case Demangle::Node::Kind::Enum:
return DeclKind::Enum;
case Demangle::Node::Kind::Protocol:
return DeclKind::Protocol;
case Demangle::Node::Kind::Variable:
return DeclKind::Var;
default:
llvm_unreachable("Missing alias");
}
}
// This should be called with a function type & its associated Decl. If the
// type is not a function type,
// then we just return the original type, but we don't check that the Decl is
// the associated one.
// It is assumed you will get that right in calling this.
// Returns a version of the input type with the ExtInfo AbstractCC set
// correctly.
// This allows CompilerType::IsSwiftMethod to work properly off the swift Type.
// FIXME: we don't currently distinguish between Method & Witness. These types
// don't actually get used
// to make Calling Convention choices - originally we were leaving them all at
// Normal... But if we ever
// need to set it for that purpose we will have to fix that here.
static TypeBase *FixCallingConv(Decl *in_decl, TypeBase *in_type) {
if (!in_decl)
return in_type;
auto *func_type = dyn_cast<AnyFunctionType>(in_type);
if (func_type) {
DeclContext *decl_context = in_decl->getDeclContext();
if (decl_context && decl_context->isTypeContext()) {
// Add the ExtInfo:
AnyFunctionType::ExtInfo new_info(
func_type->getExtInfo().withSILRepresentation(
SILFunctionTypeRepresentation::Method));
return func_type->withExtInfo(new_info);
}
}
return in_type;
}
static void
VisitNode(ASTContext *ast,
Demangle::NodePointer node,
VisitNodeResult &result);
static void VisitNodeAddressor(
ASTContext *ast,
Demangle::NodePointer cur_node, VisitNodeResult &result) {
// Addressors are apparently SIL-level functions of the form () -> RawPointer
// and they bear no connection to their original variable at the interface
// level
CanFunctionType swift_can_func_type =
CanFunctionType::get({}, ast->TheRawPointerType);
result._types.push_back(swift_can_func_type.getPointer());
}
static void VisitNodeAssociatedTypeRef(
ASTContext *ast,
Demangle::NodePointer cur_node, VisitNodeResult &result) {
Demangle::NodePointer root = cur_node->getChild(0);
Demangle::NodePointer ident = cur_node->getChild(1);
if (!root || !ident)
return;
VisitNodeResult type_result;
VisitNode(ast, root, type_result);
if (type_result._types.size() == 1) {
TypeBase *type = type_result._types[0].getPointer();
if (type) {
ArchetypeType *archetype = type->getAs<ArchetypeType>();
if (archetype) {
Identifier identifier = ast->getIdentifier(ident->getText());
Type nested;
if (archetype->hasNestedType(identifier))
nested = archetype->getNestedType(identifier);
if (nested) {
result._types.push_back(nested);
result._module = type_result._module;
return;
}
}
}
}
result._types.clear();
result._error = stringWithFormat(
"unable to find associated type %s in context",
ident->getText().str().c_str());
}
static void VisitNodeGenericTypealias(ASTContext *ast,
Demangle::NodePointer cur_node,
VisitNodeResult &result) {
VisitNodeResult generic_type_result;
VisitNodeResult template_types_result;
Demangle::Node::iterator end = cur_node->end();
for (Demangle::Node::iterator pos = cur_node->begin(); pos != end; ++pos) {
const Demangle::Node::Kind child_node_kind = (*pos)->getKind();
switch (child_node_kind) {
case Demangle::Node::Kind::Type:
VisitNode(ast, *pos, generic_type_result);
break;
case Demangle::Node::Kind::TypeList:
VisitNode(ast, *pos, template_types_result);
break;
default:
break;
}
}
if (generic_type_result._decls.size() != 1 ||
generic_type_result._types.size() != 1)
return;
auto *genericTypeAlias =
cast<TypeAliasDecl>(generic_type_result._decls.front());
GenericSignature *signature = genericTypeAlias->getGenericSignature();
if (signature &&
template_types_result._types.size() !=
signature->getGenericParams().size()) {
result._error = stringWithFormat(
"wrong number of generic arguments (%d) for generic typealias %s; "
"expected %d",
template_types_result._types.size(),
genericTypeAlias->getBaseName().userFacingName(),
signature->getGenericParams().size());
return;
}
if (signature && signature->getNumConformanceRequirements() != 0) {
result._error =
"cannot handle generic typealias with conformance requirements";
return;
}
// FIXME: handle conformances.
SubstitutionMap subMap;
if (signature)
subMap = SubstitutionMap::get(signature, template_types_result._types,
ArrayRef<ProtocolConformanceRef>({}));
Type parentType;
if (auto nominal = genericTypeAlias->getDeclContext()
->getSelfNominalTypeDecl()) {
parentType = nominal->getDeclaredInterfaceType().subst(subMap);
}
NameAliasType *NAT = NameAliasType::get(
genericTypeAlias, parentType, subMap,
genericTypeAlias->getDeclaredInterfaceType().subst(subMap));
result._types.push_back(NAT);
result._decls.push_back(genericTypeAlias);
}
static void VisitNodeBoundGeneric(
ASTContext *ast,
Demangle::NodePointer cur_node, VisitNodeResult &result) {
if (cur_node->begin() != cur_node->end()) {
VisitNodeResult generic_type_result;
VisitNodeResult template_types_result;
Demangle::Node::iterator end = cur_node->end();
for (Demangle::Node::iterator pos = cur_node->begin(); pos != end; ++pos) {
const Demangle::Node::Kind child_node_kind = (*pos)->getKind();
switch (child_node_kind) {
case Demangle::Node::Kind::Type:
VisitNode(ast, *pos, generic_type_result);
break;
case Demangle::Node::Kind::TypeList:
VisitNode(ast, *pos, template_types_result);
break;
default:
break;
}
}
if (generic_type_result._decls.size() == 1 &&
generic_type_result._types.size() == 1 &&
!template_types_result._types.empty()) {
auto *nominal_type_decl =
cast<NominalTypeDecl>(generic_type_result._decls.front());
auto parent_type = generic_type_result._types.front()
->getNominalParent();
result._types.push_back(
BoundGenericType::get(
nominal_type_decl, parent_type, template_types_result._types));
result._decls.push_back(nominal_type_decl);
}
}
}
static void VisitNodeBuiltinTypeName(
ASTContext *ast,
Demangle::NodePointer cur_node, VisitNodeResult &result) {
std::string builtin_name = cur_node->getText();
StringRef builtin_name_ref(builtin_name);
if (builtin_name_ref.startswith(BUILTIN_TYPE_NAME_PREFIX)) {
StringRef stripped_name_ref =
builtin_name_ref.drop_front(strlen(BUILTIN_TYPE_NAME_PREFIX));
SmallVector<ValueDecl *, 1> builtin_decls;
result._module =
DeclsLookupSource::GetDeclsLookupSource(*ast, ConstString(BUILTIN_NAME));
if (!FindNamedDecls(ast, ast->getIdentifier(stripped_name_ref), result)) {
result.Clear();
result._error = stringWithFormat("Couldn't find %s in the builtin module",
builtin_name.c_str());
}
} else {
result._error = stringWithFormat(
"BuiltinTypeName %s doesn't start with %s", builtin_name.c_str(), BUILTIN_TYPE_NAME_PREFIX);
}
}
static void VisitNodeConstructor(
ASTContext *ast,
Demangle::NodePointer cur_node, VisitNodeResult &result) {
VisitNodeResult kind_type_result;
VisitNodeResult type_result;
std::vector<StringRef> labels;
Demangle::Node::iterator end = cur_node->end();
for (Demangle::Node::iterator pos = cur_node->begin(); pos != end; ++pos) {
const Demangle::Node::Kind child_node_kind = (*pos)->getKind();
switch (child_node_kind) {
case Demangle::Node::Kind::Enum:
case Demangle::Node::Kind::Class:
case Demangle::Node::Kind::Structure:
VisitNode(ast, *pos, kind_type_result);
break;
case Demangle::Node::Kind::LabelList: {
for (const auto &label : **pos) {
if (label->getKind() == Demangle::Node::Kind::FirstElementMarker)
labels.push_back(StringRef());
else {
labels.push_back(label->getText());
}
}
break;
}
case Demangle::Node::Kind::Type:
VisitNode(ast, *pos, type_result);
break;
default:
break;
}
}
if (kind_type_result.HasSingleType() && type_result.HasSingleType()) {
bool found = false;
const size_t n = FindNamedDecls(ast, DeclBaseName::createConstructor(),
kind_type_result);
if (n == 1) {
found = true;
kind_type_result._types[0] = FixCallingConv(
kind_type_result._decls[0], kind_type_result._types[0].getPointer());
result = kind_type_result;
} else if (n > 0) {
const size_t num_kind_type_results = kind_type_result._types.size();
for (size_t i = 0; i < num_kind_type_results && !found; ++i) {
auto &identifier_type = kind_type_result._types[i];
if (identifier_type &&
identifier_type->getKind() ==
type_result._types.front()->getKind()) {
// These are the same kind of type, we need to disambiguate them
switch (identifier_type->getKind()) {
default:
break;
case TypeKind::Function: {
const AnyFunctionType *identifier_func =
identifier_type->getAs<AnyFunctionType>();
// inits are typed as (Foo.Type) -> (args...) -> Foo, but don't
// assert that in case we're dealing with broken code.
if (identifier_func->getParams().size() == 1 &&
identifier_func->getParams()[0].getOldType()->is<AnyMetatypeType>() &&
identifier_func->getResult()->is<AnyFunctionType>()) {
identifier_func =
identifier_func->getResult()->getAs<AnyFunctionType>();
}
const AnyFunctionType *type_func =
type_result._types.front()->getAs<AnyFunctionType>();
if (CompareFunctionTypes(type_func, identifier_func, labels)) {
result._module = kind_type_result._module;
result._decls.push_back(kind_type_result._decls[i]);
result._types.push_back(
FixCallingConv(kind_type_result._decls[i],
kind_type_result._types[i].getPointer()));
found = true;
}
} break;
}
}
}
}
// Didn't find a match, just return the raw function type
if (!found)
result = type_result;
}
}
static void VisitNodeDestructor(
ASTContext *ast,
Demangle::NodePointer cur_node, VisitNodeResult &result) {
VisitNodeResult kind_type_result;
Demangle::Node::iterator end = cur_node->end();
for (Demangle::Node::iterator pos = cur_node->begin(); pos != end; ++pos) {
const Demangle::Node::Kind child_node_kind = (*pos)->getKind();
switch (child_node_kind) {
case Demangle::Node::Kind::Enum:
case Demangle::Node::Kind::Class:
case Demangle::Node::Kind::Structure:
VisitNode(ast, *pos, kind_type_result);
break;
default:
break;
}
}
if (kind_type_result.HasSingleType()) {
const size_t n = FindNamedDecls(ast, DeclBaseName::createDestructor(),
kind_type_result);
if (n == 1) {
kind_type_result._types[0] = FixCallingConv(
kind_type_result._decls[0], kind_type_result._types[0].getPointer());
result = kind_type_result;
} else if (n > 0) {
// I can't think of a reason why we would get more than one decl called
// deinit here, but
// just in case, if it is a function type, we should remember it.
bool found = false;
const size_t num_kind_type_results = kind_type_result._types.size();
for (size_t i = 0; i < num_kind_type_results && !found; ++i) {
auto &identifier_type = kind_type_result._types[i];
if (identifier_type) {