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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <fstream>
#include <iostream>
#include "src/torque/declarable.h"
#include "src/torque/type-oracle.h"
#include "src/torque/types.h"
namespace v8 {
namespace internal {
namespace torque {
std::string Type::ToString() const {
if (aliases_.size() == 0) return ToExplicitString();
if (aliases_.size() == 1) return *aliases_.begin();
std::stringstream result;
int i = 0;
for (const std::string& alias : aliases_) {
if (i == 0) {
result << alias << " (aka. ";
} else if (i == 1) {
result << alias;
} else {
result << ", " << alias;
}
++i;
}
result << ")";
return result.str();
}
bool Type::IsSubtypeOf(const Type* supertype) const {
if (const UnionType* union_type = UnionType::DynamicCast(supertype)) {
return union_type->IsSupertypeOf(this);
}
const Type* subtype = this;
while (subtype != nullptr) {
if (subtype == supertype) return true;
subtype = subtype->parent();
}
return false;
}
// static
const Type* Type::CommonSupertype(const Type* a, const Type* b) {
int diff = a->Depth() - b->Depth();
const Type* a_supertype = a;
const Type* b_supertype = b;
for (; diff > 0; --diff) a_supertype = a_supertype->parent();
for (; diff < 0; ++diff) b_supertype = b_supertype->parent();
while (a_supertype && b_supertype) {
if (a_supertype == b_supertype) return a_supertype;
a_supertype = a_supertype->parent();
b_supertype = b_supertype->parent();
}
ReportError("types " + a->ToString() + " and " + b->ToString() +
" have no common supertype");
}
int Type::Depth() const {
int result = 0;
for (const Type* current = parent_; current; current = current->parent_) {
++result;
}
return result;
}
bool Type::IsAbstractName(const std::string& name) const {
if (!IsAbstractType()) return false;
return AbstractType::cast(this)->name() == name;
}
std::string AbstractType::GetGeneratedTNodeTypeName() const {
std::string result = GetGeneratedTypeName();
DCHECK_EQ(result.substr(0, 6), "TNode<");
result = result.substr(6, result.length() - 7);
return result;
}
std::string FunctionPointerType::ToExplicitString() const {
std::stringstream result;
result << "builtin (";
PrintCommaSeparatedList(result, parameter_types_);
result << ") => " << *return_type_;
return result.str();
}
std::string FunctionPointerType::MangledName() const {
std::stringstream result;
result << "FT";
for (const Type* t : parameter_types_) {
std::string arg_type_string = t->MangledName();
result << arg_type_string.size() << arg_type_string;
}
std::string return_type_string = return_type_->MangledName();
result << return_type_string.size() << return_type_string;
return result.str();
}
std::string UnionType::ToExplicitString() const {
std::stringstream result;
result << "(";
bool first = true;
for (const Type* t : types_) {
if (!first) {
result << " | ";
}
first = false;
result << *t;
}
result << ")";
return result.str();
}
std::string UnionType::MangledName() const {
std::stringstream result;
result << "UT";
for (const Type* t : types_) {
std::string arg_type_string = t->MangledName();
result << arg_type_string.size() << arg_type_string;
}
return result.str();
}
std::string UnionType::GetGeneratedTNodeTypeName() const {
if (types_.size() <= 3) {
std::set<std::string> members;
for (const Type* t : types_) {
members.insert(t->GetGeneratedTNodeTypeName());
}
if (members == std::set<std::string>{"Smi", "HeapNumber"}) {
return "Number";
}
if (members == std::set<std::string>{"Smi", "HeapNumber", "BigInt"}) {
return "Numeric";
}
}
return parent()->GetGeneratedTNodeTypeName();
}
const Type* UnionType::NonConstexprVersion() const {
if (IsConstexpr()) {
auto it = types_.begin();
UnionType result((*it)->NonConstexprVersion());
++it;
for (; it != types_.end(); ++it) {
result.Extend((*it)->NonConstexprVersion());
}
return TypeOracle::GetUnionType(std::move(result));
}
return this;
}
std::string StructType::ToExplicitString() const {
std::stringstream result;
result << "{";
PrintCommaSeparatedList(result, fields_);
result << "}";
return result.str();
}
void PrintSignature(std::ostream& os, const Signature& sig, bool with_names) {
os << "(";
for (size_t i = 0; i < sig.parameter_types.types.size(); ++i) {
if (i > 0) os << ", ";
if (with_names && !sig.parameter_names.empty()) {
os << sig.parameter_names[i] << ": ";
}
os << *sig.parameter_types.types[i];
}
if (sig.parameter_types.var_args) {
if (sig.parameter_names.size()) os << ", ";
os << "...";
}
os << ")";
os << ": " << *sig.return_type;
if (sig.labels.empty()) return;
os << " labels ";
for (size_t i = 0; i < sig.labels.size(); ++i) {
if (i > 0) os << ", ";
if (with_names) os << sig.labels[i].name;
if (sig.labels[i].types.size() > 0) os << "(" << sig.labels[i].types << ")";
}
}
std::ostream& operator<<(std::ostream& os, const NameAndType& name_and_type) {
os << name_and_type.name;
os << ": ";
os << *name_and_type.type;
return os;
}
std::ostream& operator<<(std::ostream& os, const Signature& sig) {
PrintSignature(os, sig, true);
return os;
}
std::ostream& operator<<(std::ostream& os, const TypeVector& types) {
PrintCommaSeparatedList(os, types);
return os;
}
std::ostream& operator<<(std::ostream& os, const ParameterTypes& p) {
PrintCommaSeparatedList(os, p.types);
if (p.var_args) {
if (p.types.size() > 0) os << ", ";
os << "...";
}
return os;
}
bool Signature::HasSameTypesAs(const Signature& other) const {
if (!(parameter_types.types == other.parameter_types.types &&
parameter_types.var_args == other.parameter_types.var_args &&
return_type == other.return_type)) {
return false;
}
if (labels.size() != other.labels.size()) {
return false;
}
size_t i = 0;
for (auto l : labels) {
if (l.types != other.labels[i++].types) {
return false;
}
}
return true;
}
bool IsAssignableFrom(const Type* to, const Type* from) {
if (to == from) return true;
if (from->IsSubtypeOf(to)) return true;
return TypeOracle::IsImplicitlyConvertableFrom(to, from);
}
bool IsCompatibleSignature(const Signature& sig, const TypeVector& types,
const std::vector<Label*>& labels) {
auto i = sig.parameter_types.types.begin();
if (sig.parameter_types.types.size() > types.size()) return false;
// TODO(danno): The test below is actually insufficient. The labels'
// parameters must be checked too. ideally, the named part of
// LabelDeclarationVector would be factored out so that the label count and
// parameter types could be passed separately.
if (sig.labels.size() != labels.size()) return false;
for (auto current : types) {
if (i == sig.parameter_types.types.end()) {
if (!sig.parameter_types.var_args) return false;
if (!IsAssignableFrom(TypeOracle::GetObjectType(), current)) return false;
} else {
if (!IsAssignableFrom(*i++, current)) return false;
}
}
return true;
}
bool operator<(const Type& a, const Type& b) {
return a.MangledName() < b.MangledName();
}
VisitResult::VisitResult(const Type* type, const Value* declarable)
: type_(type), value_(), declarable_(declarable) {}
std::string VisitResult::LValue() const {
return std::string("*") + (declarable_ ? (*declarable_)->value() : value_);
}
std::string VisitResult::RValue() const {
if (declarable()) {
auto value = *declarable();
if (value->IsVariable() && !Variable::cast(value)->IsDefined()) {
std::stringstream s;
s << "\"" << value->name() << "\" is used before it is defined";
ReportError(s.str());
}
return value->RValue();
} else {
return value_;
}
}
} // namespace torque
} // namespace internal
} // namespace v8
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