std::string MethodSetElement::toString() const {
return makeString("MethodSetElement(constPredicate: %s, noexceptPredicate: %s, requirePredicate: %s, returnType: %s, ...)",
constPredicate().toString().c_str(),
noexceptPredicate().toString().c_str(),
requirePredicate().toString().c_str(),
returnType()->toString().c_str());
}
bool MethodSetElement::operator==(const MethodSetElement& methodSetElement) const {
return templateVariables() == methodSetElement.templateVariables() &&
constPredicate() == methodSetElement.constPredicate() &&
noexceptPredicate() == methodSetElement.noexceptPredicate() &&
requirePredicate() == methodSetElement.requirePredicate() &&
returnType() == methodSetElement.returnType() &&
parameterTypes() == methodSetElement.parameterTypes() &&
isStatic() == methodSetElement.isStatic();
}
std::size_t MethodSetElement::hash() const {
std::size_t seed = 0;
boost::hash_combine(seed, templateVariables().hash());
boost::hash_combine(seed, constPredicate().hash());
boost::hash_combine(seed, noexceptPredicate().hash());
boost::hash_combine(seed, requirePredicate().hash());
boost::hash_combine(seed, isStatic());
boost::hash_combine(seed, returnType());
for (const auto& parameterType: parameterTypes()) {
boost::hash_combine(seed, parameterType);
}
return seed;
}
SEM::Value GetTemplatedMethodWithoutResolution(Context& context, SEM::Value value, const SEM::Type* const type, const String& methodName, SEM::ValueArray templateArguments, const Debug::SourceLocation& location) {
assert(value.type()->isRef() && value.type()->isBuiltInReference());
if (!type->isObjectOrTemplateVar()) {
throw ErrorException(makeString("Cannot get method '%s' for non-object type '%s' at position %s.",
methodName.c_str(), type->toString().c_str(), location.toString().c_str()));
}
const auto methodSet = getTypeMethodSet(context, type);
const auto& objectConstPredicate = methodSet->constPredicate();
const auto canonicalMethodName = CanonicalizeMethodName(methodName);
const auto methodIterator = methodSet->find(canonicalMethodName);
if (methodIterator == methodSet->end()) {
throw ErrorException(makeString("Cannot find method '%s' for type '%s' at position %s.",
methodName.c_str(),
type->toString().c_str(),
location.toString().c_str()));
}
const auto& methodElement = methodIterator->second;
if (methodElement.isStatic()) {
throw ErrorException(makeString("Cannot access static method '%s' for value of type '%s' at position %s.",
methodName.c_str(),
type->toString().c_str(),
location.toString().c_str()));
}
auto templateVariableAssignments = type->generateTemplateVarMap();
const auto function = type->isObject() ? type->getObjectType()->functions().at(canonicalMethodName).get() : nullptr;
if (function != nullptr) {
const auto& templateVariables = function->templateVariables();
if (templateVariables.size() != templateArguments.size()) {
// Try to apply some basic deduction...
if (templateVariables.size() == 1 && templateArguments.size() == 0 &&
function->constPredicate().isVariable() &&
function->constPredicate().variableTemplateVar() == templateVariables[0]
) {
const auto boolType = getBuiltInType(context, context.getCString("bool"), {});
templateArguments.push_back(SEM::Value::PredicateExpr(objectConstPredicate.copy(), boolType));
} else {
throw ErrorException(makeString("Incorrect number of template "
"arguments provided for method '%s'; %llu were required, "
"but %llu were provided at position %s.",
function->name().toString().c_str(),
(unsigned long long) templateVariables.size(),
(unsigned long long) templateArguments.size(),
location.toString().c_str()));
}
}
// Add function template variable => argument mapping.
for (size_t i = 0; i < templateArguments.size(); i++) {
const auto templateVariable = templateVariables.at(i);
const auto& templateValue = templateArguments.at(i);
if (templateValue.isTypeRef()) {
const auto templateTypeValue = templateValue.typeRefType()->resolveAliases();
if (!templateTypeValue->isObjectOrTemplateVar() || templateTypeValue->isInterface()) {
throw ErrorException(makeString("Invalid type '%s' passed "
"as template parameter '%s' for method '%s' at position %s.",
templateTypeValue->toString().c_str(),
templateVariable->name().toString().c_str(),
function->name().toString().c_str(),
location.toString().c_str()));
}
templateVariableAssignments.insert(std::make_pair(templateVariable, SEM::Value::TypeRef(templateTypeValue, templateValue.type())));
} else {
templateVariableAssignments.insert(std::make_pair(templateVariable, templateValue.copy()));
}
}
} else {
assert(templateArguments.empty());
}
const auto methodConstPredicate = methodElement.constPredicate().substitute(templateVariableAssignments);
if (!objectConstPredicate.implies(methodConstPredicate)) {
throw ErrorException(makeString("Cannot refer to mutator method '%s' from const object of type '%s' at position %s.",
methodName.c_str(),
type->toString().c_str(),
location.toString().c_str()));
}
// Now check the template arguments satisfy the requires predicate.
const auto& requirePredicate = methodElement.requirePredicate();
// Conservatively assume require predicate is not satisified if result is undetermined.
const bool satisfiesRequireDefault = false;
if (!evaluatePredicateWithDefault(context, requirePredicate, templateVariableAssignments, satisfiesRequireDefault)) {
throw ErrorException(makeString("Template arguments do not satisfy "
"require predicate '%s' of method '%s' at position %s.",
requirePredicate.substitute(templateVariableAssignments).toString().c_str(),
methodName.c_str(),
location.toString().c_str()));
}
if (function != nullptr) {
const auto functionType = simplifyFunctionType(context, function->type().substitute(templateVariableAssignments));
const auto functionRefType = createFunctionPointerType(context, functionType);
auto functionRef = addDebugInfo(SEM::Value::FunctionRef(type, function, std::move(templateArguments), functionRefType), location);
if (type->isInterface()) {
const auto interfaceMethodType = createInterfaceMethodType(context, functionType);
return addDebugInfo(SEM::Value::InterfaceMethodObject(std::move(functionRef), std::move(value), interfaceMethodType), location);
} else {
const auto methodType = createMethodType(context, functionType);
return addDebugInfo(SEM::Value::MethodObject(std::move(functionRef), std::move(value), methodType), location);
}
} else {
const bool isTemplated = true;
const auto functionType = methodElement.createFunctionType(isTemplated);
const auto functionRefType = createFunctionPointerType(context, functionType);
auto functionRef = addDebugInfo(SEM::Value::TemplateFunctionRef(type, methodName, functionRefType), location);
const auto methodType = createMethodType(context, functionType);
return addDebugInfo(SEM::Value::MethodObject(std::move(functionRef), std::move(value), methodType), location);
}
}
MethodSetElement MethodSetElement::withNoExceptPredicate(Predicate newNoExceptPredicate) const {
return MethodSetElement(templateVariables().copy(), constPredicate().copy(),
std::move(newNoExceptPredicate),
requirePredicate().copy(),
isStatic(), returnType(), parameterTypes().copy());
}
MethodSetElement MethodSetElement::withRequirement(Predicate requirement) const {
return MethodSetElement(templateVariables().copy(), constPredicate().copy(),
noexceptPredicate().copy(),
Predicate::And(requirePredicate().copy(), std::move(requirement)),
isStatic(), returnType(), parameterTypes().copy());
}
MethodSetElement MethodSetElement::copy() const {
return MethodSetElement(templateVariables().copy(), constPredicate().copy(),
noexceptPredicate().copy(),
requirePredicate().copy(),
isStatic(), returnType(), parameterTypes().copy());
}
