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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/Decl.h"
#include "swift/AST/GenericSignature.h"
#include "swift/Basic/ManglingMacros.h"
#include "swift/AST/NameLookup.h"
#include "swift/Basic/Demangle.h"
#include "swift/ClangImporter/ClangImporter.h"
#include "swift/SIL/SILModule.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.
typedef const std::string ConstString;
static std::string stringWithFormat(const std::string fmt_str, ...) {
int final_n, n = ((int)fmt_str.size()) * 2;
std::string str;
std::unique_ptr<char[]> formatted;
va_list ap;
while (1) {
formatted.reset(new char[n]);
strcpy(&formatted[0], fmt_str.c_str());
va_start(ap, fmt_str);
final_n = vsnprintf(&formatted[0], n, fmt_str.c_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());
}
class DeclsLookupSource {
public:
typedef SmallVectorImpl<ValueDecl *> ValueDecls;
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.size() > 0; }
decltype(m_decls)::const_iterator begin() { return m_decls.begin(); }
decltype(m_decls)::const_iterator end() { return m_decls.end(); }
};
bool lookupQualified(ModuleDecl *entry, Identifier name, NLOptions options,
LazyResolver *typeResolver, ValueDecls &decls) {
if (!entry)
return false;
size_t decls_size = decls.size();
entry->lookupQualified(ModuleType::get(entry), name, options, typeResolver,
decls);
return decls.size() > decls_size;
}
bool lookupValue(ModuleDecl *entry, Identifier 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, Crawler, Decl, Extension, Invalid };
typedef Optional<std::string> PrivateDeclIdentifier;
static DeclsLookupSource GetDeclsLookupSource(ASTContext &ast,
ConstString module_name,
bool allow_crawler = true) {
assert(!module_name.empty());
static ConstString g_ObjectiveCModule(MANGLING_MODULE_OBJC);
static ConstString g_BuiltinModule("Builtin");
static ConstString g_CModule(MANGLING_MODULE_C);
if (allow_crawler) {
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 lookupQualified(Identifier name, NLOptions options,
LazyResolver *typeResolver, ValueDecls &result) {
if (_type == LookupKind::Crawler) {
ASTContext *ast_ctx = _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)
lookupQualified(_module, name, options, typeResolver, result);
return;
}
void lookupValue(ModuleDecl::AccessPathTy path, Identifier name, NLKind kind,
ValueDecls &result) {
if (_type == LookupKind::Crawler) {
ASTContext *ast_ctx = _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::Crawler:
return nullptr;
}
llvm_unreachable("Unhandled LookupKind in switch.");
}
ConstString GetName() const {
switch (_type) {
case LookupKind::Invalid:
return ConstString("Invalid");
case LookupKind::Crawler:
return ConstString("Crawler");
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::Crawler:
_crawler._ast = rhs._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::Crawler:
_crawler._ast = rhs._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::Crawler:
return _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;
} _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) {
_crawler._ast = _a;
_type = LookupKind::Crawler;
} 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 FindFirstNamedDeclWithKind(
ASTContext *ast, const StringRef &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) {
bool check_type_aliases = false;
DeclsLookupSource lookup(
DeclsLookupSource::GetDeclsLookupSource(nominal_decl));
SmallVector<ValueDecl *, 4> decls;
lookup.lookupMember(ast->getIdentifier(name),
GetIdentifier(ast, priv_decl_id), decls);
for (auto decl : decls) {
const DeclKind curr_decl_kind = decl->getKind();
if (curr_decl_kind == decl_kind) {
result._decls.back() = 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();
}
if (result._types.empty())
result._types.push_back(decl_type);
else
result._types.back() = decl_type;
return true;
} else if (curr_decl_kind == DeclKind::TypeAlias)
check_type_aliases = true;
}
if (check_type_aliases) {
for (auto decl : decls) {
const DeclKind curr_decl_kind = decl->getKind();
if (curr_decl_kind == DeclKind::TypeAlias) {
result._decls.back() = 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();
}
if (result._types.empty())
result._types.push_back(decl_type);
else
result._types.back() = decl_type;
return true;
}
}
}
}
}
} else if (result._module) {
ModuleDecl::AccessPathTy access_path;
Identifier name_ident(ast->getIdentifier(name));
SmallVector<ValueDecl *, 4> decls;
if (priv_decl_id)
result._module.lookupMember(
name_ident, ast->getIdentifier(priv_decl_id.getValue().c_str()),
decls);
else
result._module.lookupQualified(name_ident, NLOptions(), nullptr, decls);
if (!decls.empty()) {
bool check_type_aliases = false;
// Look for an exact match first
for (auto decl : decls) {
const DeclKind curr_decl_kind = decl->getKind();
if (curr_decl_kind == decl_kind) {
result._decls.assign(1, decl);
if (decl->hasInterfaceType()) {
result._types.assign(1, decl->getInterfaceType());
MetatypeType *meta_type =
result._types.back()->getAs<MetatypeType>();
if (meta_type)
result._types.back() = meta_type->getInstanceType();
} else {
result._types.assign(1, Type());
}
return true;
} else if (curr_decl_kind == DeclKind::TypeAlias)
check_type_aliases = true;
}
// If we didn't find any exact matches, accept any type aliases
if (check_type_aliases) {
for (auto decl : decls) {
if (isa<TypeAliasDecl>(decl)) {
result._decls.assign(1, decl);
if (decl->hasInterfaceType()) {
result._types.assign(1, decl->getInterfaceType());
MetatypeType *meta_type =
result._types.back()->getAs<MetatypeType>();
if (meta_type)
result._types.back() = meta_type->getInstanceType();
} else {
result._types.assign(1, Type());
}
return true;
}
}
}
}
}
result.Clear();
result._error = "Generic Error";
return false;
}
static size_t
FindNamedDecls(ASTContext *ast, const StringRef &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(ast->getIdentifier(name),
GetIdentifier(ast, priv_decl_id), decls);
if (decls.empty()) {
result._error = stringWithFormat(
"no decl found in '%s' (DeclKind=%u)", name.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;
if (decl->hasInterfaceType()) {
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)) {
// 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(ast->getIdentifier(name), FD,
ast->getLazyResolver(),
/*IsKnownPrivate=*/false, 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.str().c_str());
}
}
} else if (result._module) {
ModuleDecl::AccessPathTy access_path;
SmallVector<ValueDecl *, 4> decls;
if (priv_decl_id)
result._module.lookupMember(
ast->getIdentifier(name),
ast->getIdentifier(priv_decl_id.getValue().c_str()), decls);
else
result._module.lookupValue(access_path, ast->getIdentifier(name),
NLKind::QualifiedLookup, decls);
if (decls.empty()) {
result._error =
stringWithFormat("no decl named '%s' found in module '%s'",
name.str().c_str(), result._module.GetName().data());
} else {
for (auto decl : decls) {
if (decl->hasInterfaceType()) {
result._decls.push_back(decl);
if (decl->hasInterfaceType()) {
result._types.push_back(decl->getInterfaceType());
MetatypeType *meta_type =
result._types.back()->getAs<MetatypeType>();
if (meta_type)
result._types.back() = meta_type->getInstanceType();
} else {
result._types.push_back(Type());
}
}
}
return result._types.size();
}
}
result.Clear();
result._error = "Generic error.";
return false;
}
static const char *
SwiftDemangleNodeKindToCString(const Demangle::Node::Kind node_kind) {
#define NODE(e) \
case Demangle::Node::Kind::e: \
return #e;
switch (node_kind) {
#include "swift/Basic/DemangleNodes.def"
}
return "Demangle::Node::Kind::???";
#undef NODE
}
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;
default:
llvm_unreachable("Missing alias");
// FIXME: can we 'log' SwiftDemangleNodeKindToCString(node_kind))
}
}
// 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;
AnyFunctionType *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, std::vector<Demangle::NodePointer> &nodes,
VisitNodeResult &result,
const VisitNodeResult &genericContext); // set by GenericType case
static void VisitNodeAddressor(
ASTContext *ast, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
// 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->TheEmptyTupleType, ast->TheRawPointerType);
result._types.push_back(swift_can_func_type.getPointer());
}
static void VisitNodeAssociatedTypeRef(
ASTContext *ast, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
Demangle::NodePointer root = cur_node->getChild(0);
Demangle::NodePointer ident = cur_node->getChild(1);
if (!root || !ident)
return;
nodes.push_back(root);
VisitNodeResult type_result;
VisitNode(ast, nodes, type_result, generic_context);
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 VisitNodeBoundGeneric(
ASTContext *ast, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
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:
case Demangle::Node::Kind::Metatype:
nodes.push_back(*pos);
VisitNode(ast, nodes, generic_type_result, generic_context);
break;
case Demangle::Node::Kind::TypeList:
nodes.push_back(*pos);
VisitNode(ast, nodes, template_types_result, generic_context);
break;
default:
break;
}
}
if (generic_type_result._types.size() == 1 &&
!template_types_result._types.empty()) {
NominalTypeDecl *nominal_type_decl =
dyn_cast<NominalTypeDecl>(generic_type_result._decls.front());
DeclContext *parent_decl = nominal_type_decl->getParent();
Type parent_type;
if (parent_decl->isTypeContext())
parent_type = parent_decl->getDeclaredTypeOfContext();
result._types.push_back(Type(BoundGenericType::get(
nominal_type_decl, parent_type, template_types_result._types)));
}
}
}
static void VisitNodeBuiltinTypeName(
ASTContext *ast, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
std::string builtin_name = cur_node->getText();
StringRef builtin_name_ref(builtin_name);
if (builtin_name_ref.startswith("Builtin.")) {
StringRef stripped_name_ref =
builtin_name_ref.drop_front(strlen("Builtin."));
SmallVector<ValueDecl *, 1> builtin_decls;
result._module =
DeclsLookupSource::GetDeclsLookupSource(*ast, ConstString("Builtin"));
if (!FindNamedDecls(ast, 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 Builtin.", builtin_name.c_str());
}
}
static void VisitNodeConstructor(
ASTContext *ast, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
VisitNodeResult kind_type_result;
VisitNodeResult 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:
nodes.push_back(*pos);
VisitNode(ast, nodes, kind_type_result, generic_context);
break;
case Demangle::Node::Kind::Type:
nodes.push_back(*pos);
VisitNode(ast, nodes, type_result, generic_context);
break;
default:
break;
}
}
if (kind_type_result.HasSingleType() && type_result.HasSingleType()) {
bool found = false;
const size_t n = FindNamedDecls(ast, StringRef("init"), 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->getInput()->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 (identifier_func->getResult()->isEqual(
type_func->getResult()) &&
identifier_func->getInput()->isEqual(
type_func->getInput())) {
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, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
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:
nodes.push_back(*pos);
VisitNode(ast, nodes, kind_type_result, generic_context);
break;
default:
break;
}
}
if (kind_type_result.HasSingleType()) {
const size_t n = FindNamedDecls(ast, StringRef("deinit"), 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) {
switch (identifier_type->getKind()) {
default:
break;
case TypeKind::Function: {
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;
}
}
}
}
}
}
static void VisitNodeDeclContext(
ASTContext *ast, std::vector<Demangle::NodePointer> &nodes,
Demangle::NodePointer &cur_node, VisitNodeResult &result,
const VisitNodeResult &generic_context) { // set by GenericType case
switch (cur_node->getNumChildren()) {
default:
result._error =
stringWithFormat("DeclContext had %llu children, giving up",
(unsigned long long)cur_node->getNumChildren());
break;
case 0:
result._error = "empty DeclContext unusable";
break;
case 1:
// nominal type
nodes.push_back(cur_node->getFirstChild());
VisitNode(ast, nodes, result, generic_context);
break;
case 2:
// function type: decl-ctx + type
// FIXME: we should just be able to demangle the DeclCtx and resolve the
// function
// this is fragile and will easily break
Demangle::NodePointer path = cur_node->getFirstChild();
nodes.push_back(path);
VisitNodeResult found_decls;
VisitNode(ast, nodes, found_decls, generic_context);
Demangle::NodePointer generics = cur_node->getChild(1);
if (generics->getChild(0) == nullptr)
break;
generics = generics->getFirstChild();
if (generics->getKind() != Demangle::Node::Kind::DependentGenericType)
break;
if (generics->getChild(0) == nullptr)
break;
generics = generics->getFirstChild();
// if (generics->getKind() !=
// Demangle::Node::Kind::ArchetypeList)
// break;
AbstractFunctionDecl *func_decl = nullptr;
for (Decl *decl : found_decls._decls) {
func_decl = dyn_cast<AbstractFunctionDecl>(decl);
if (!func_decl)
continue;
GenericParamList *gen_params = func_decl->getGenericParams();
if (!gen_params)
continue;
}
if (func_decl) {
result._module = found_decls._module;