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// Copyright 2018 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/global-context.h"
#include "src/torque/type-visitor.h"
namespace v8 {
namespace internal {
namespace torque {
DEFINE_CONTEXTUAL_VARIABLE(CurrentScope)
std::ostream& operator<<(std::ostream& os, const QualifiedName& name) {
for (const std::string& qualifier : name.namespace_qualification) {
os << qualifier << "::";
}
return os << name.name;
}
std::ostream& operator<<(std::ostream& os, const Callable& m) {
os << "callable " << m.ReadableName() << "(";
if (m.signature().implicit_count != 0) {
os << "implicit ";
TypeVector implicit_parameter_types(
m.signature().parameter_types.types.begin(),
m.signature().parameter_types.types.begin() +
m.signature().implicit_count);
os << implicit_parameter_types << ")(";
TypeVector explicit_parameter_types(
m.signature().parameter_types.types.begin() +
m.signature().implicit_count,
m.signature().parameter_types.types.end());
os << explicit_parameter_types;
} else {
os << m.signature().parameter_types;
}
os << "): " << *m.signature().return_type;
return os;
}
std::ostream& operator<<(std::ostream& os, const Builtin& b) {
os << "builtin " << *b.signature().return_type << " " << b.ReadableName()
<< b.signature().parameter_types;
return os;
}
std::ostream& operator<<(std::ostream& os, const RuntimeFunction& b) {
os << "runtime function " << *b.signature().return_type << " "
<< b.ReadableName() << b.signature().parameter_types;
return os;
}
std::ostream& operator<<(std::ostream& os, const Generic& g) {
os << "generic " << g.name() << "<";
PrintCommaSeparatedList(
os, g.declaration()->generic_parameters,
[](const Identifier* identifier) { return identifier->value; });
os << ">";
return os;
}
namespace {
base::Optional<const Type*> InferTypeArgument(const std::string& to_infer,
TypeExpression* parameter,
const Type* argument) {
BasicTypeExpression* basic = BasicTypeExpression::DynamicCast(parameter);
if (basic && basic->namespace_qualification.empty() && !basic->is_constexpr &&
basic->name == to_infer) {
return argument;
}
auto* ref = ReferenceTypeExpression::DynamicCast(parameter);
if (ref && argument->IsReferenceType()) {
return InferTypeArgument(to_infer, ref->referenced_type,
ReferenceType::cast(argument)->referenced_type());
}
return base::nullopt;
}
base::Optional<const Type*> InferTypeArgument(
const std::string& to_infer, const std::vector<TypeExpression*>& parameters,
const TypeVector& arguments) {
for (size_t i = 0; i < arguments.size() && i < parameters.size(); ++i) {
if (base::Optional<const Type*> inferred =
InferTypeArgument(to_infer, parameters[i], arguments[i])) {
return *inferred;
}
}
return base::nullopt;
}
} // namespace
base::Optional<TypeVector> Generic::InferSpecializationTypes(
const TypeVector& explicit_specialization_types,
const TypeVector& arguments) {
TypeVector result = explicit_specialization_types;
size_t type_parameter_count = declaration()->generic_parameters.size();
if (explicit_specialization_types.size() > type_parameter_count) {
return base::nullopt;
}
for (size_t i = explicit_specialization_types.size();
i < type_parameter_count; ++i) {
const std::string type_name = declaration()->generic_parameters[i]->value;
size_t implicit_count =
declaration()->callable->signature->parameters.implicit_count;
const std::vector<TypeExpression*>& parameters =
declaration()->callable->signature->parameters.types;
std::vector<TypeExpression*> explicit_parameters(
parameters.begin() + implicit_count, parameters.end());
base::Optional<const Type*> inferred =
InferTypeArgument(type_name, explicit_parameters, arguments);
if (!inferred) return base::nullopt;
result.push_back(*inferred);
}
return result;
}
bool Namespace::IsDefaultNamespace() const {
return this == GlobalContext::GetDefaultNamespace();
}
bool Namespace::IsTestNamespace() const { return name() == kTestNamespaceName; }
const Type* TypeAlias::Resolve() const {
if (!type_) {
CurrentScope::Scope scope_activator(ParentScope());
CurrentSourcePosition::Scope position_activator(Position());
TypeDeclaration* decl = *delayed_;
if (being_resolved_) {
std::stringstream s;
s << "Cannot create type " << decl->name->value
<< " due to circular dependencies.";
ReportError(s.str());
}
type_ = TypeVisitor::ComputeType(decl);
}
return *type_;
}
} // namespace torque
} // namespace internal
} // namespace v8
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