void cpp_typecheckt::convert_non_template_declaration(
cpp_declarationt &declaration)
{
assert(!declaration.is_template());
// we first check if this is a typedef
typet &declaration_type=declaration.type();
bool is_typedef=declaration.is_typedef();
declaration.name_anon_struct_union();
typecheck_type(declaration_type);
// Elaborate any class template instance _unless_ we do a typedef.
// These are only elaborated on usage!
if(!is_typedef)
elaborate_class_template(declaration_type);
// Special treatment for anonymous unions
if(declaration.declarators().empty() &&
follow(declaration.type()).get_bool(ID_C_is_anonymous))
{
typet final_type=follow(declaration.type());
if(final_type.id()!=ID_union)
{
error().source_location=final_type.source_location();
error() << "top-level declaration does not declare anything"
<< eom;
throw 0;
}
codet dummy;
convert_anonymous_union(declaration, dummy);
}
// do the declarators (optional)
Forall_cpp_declarators(it, declaration)
{
// copy the declarator (we destroy the original)
cpp_declaratort declarator=*it;
cpp_declarator_convertert cpp_declarator_converter(*this);
cpp_declarator_converter.is_typedef=is_typedef;
symbolt &symbol=cpp_declarator_converter.convert(
declaration_type, declaration.storage_spec(),
declaration.member_spec(), declarator);
// any template instance to remember?
if(declaration.find(ID_C_template).is_not_nil())
{
symbol.type.set(ID_C_template, declaration.find(ID_C_template));
symbol.type.set(ID_C_template_arguments, declaration.find(ID_C_template_arguments));
}
// replace declarator by symbol expression
exprt tmp=cpp_symbol_expr(symbol);
it->swap(tmp);
// is there a constructor to be called for the declarator?
if(symbol.is_lvalue &&
declarator.init_args().has_operands())
{
symbol.value=
cpp_constructor(
symbol.location,
cpp_symbol_expr(symbol),
declarator.init_args().operands());
}
}
void cpp_typecheckt::typecheck_friend_declaration(
symbolt &symbol,
cpp_declarationt &declaration)
{
// A friend of a class can be a function/method,
// or a struct/class/union type.
if(declaration.is_template())
{
return; // TODO
err_location(declaration.type().location());
str << "friend template not supported";
throw 0;
}
// we distinguish these whether there is a declarator
if(declaration.declarators().empty())
{
typet &ftype=declaration.type();
// must be struct or union
if(ftype.id()!=ID_struct && ftype.id()!=ID_union)
{
err_location(declaration.type());
str << "unexpected friend";
throw 0;
}
if(ftype.find(ID_body).is_not_nil())
{
err_location(declaration.type());
str << "friend declaration must not have compound body";
throw 0;
}
// typecheck ftype
// TODO
// typecheck_type(ftype);
// assert(ftype.id()==ID_symbol);
// symbol.type.add("#friends").move_to_sub(ftype);
return;
}
// It should be a friend function.
// Do the declarators.
Forall_cpp_declarators(sub_it, declaration)
{
bool has_value = sub_it->value().is_not_nil();
if(!has_value)
{
// If no value is found, then we jump to the
// global scope, and we convert the declarator
// as if it were declared there
cpp_save_scopet saved_scope(cpp_scopes);
cpp_scopes.go_to_global_scope();
cpp_declarator_convertert cpp_declarator_converter(*this);
const symbolt &conv_symb = cpp_declarator_converter.convert(
declaration.type(), declaration.storage_spec(),
declaration.member_spec(), *sub_it);
exprt symb_expr = cpp_symbol_expr(conv_symb);
symbol.type.add("#friends").move_to_sub(symb_expr);
}
else
{
cpp_declarator_convertert cpp_declarator_converter(*this);
cpp_declarator_converter.is_friend = true;
declaration.member_spec().set_inline(true);
const symbolt &conv_symb = cpp_declarator_converter.convert(
declaration.type(), declaration.storage_spec(),
declaration.member_spec(), *sub_it);
exprt symb_expr = cpp_symbol_expr(conv_symb);
symbol.type.add("#friends").move_to_sub(symb_expr);
}
}