void cpp_typecheckt::static_initialization()
{
code_blockt block_sini; // Static Initialization Block
code_blockt block_dini; // Dynamic Initialization Block
disable_access_control = true;
// first do zero initialization
context.foreach_operand([this, &block_sini](const symbolt &s) {
if(!s.static_lifetime || s.mode != current_mode)
return;
// it has a non-code initializer already?
if(s.value.is_not_nil() && s.value.id() != "code")
return;
// it's a declaration only
if(s.is_extern)
return;
if(!s.lvalue)
return;
zero_initializer(
cpp_symbol_expr(s), s.type, s.location, block_sini.operands());
});
while(!dinis.empty())
{
symbolt &symbol = *context.find_symbol(dinis.front());
dinis.pop_front();
if(symbol.is_extern)
continue;
if(symbol.mode != current_mode)
continue;
assert(symbol.static_lifetime);
assert(!symbol.is_type);
assert(symbol.type.id() != "code");
exprt symexpr = cpp_symbol_expr(symbol);
if(symbol.value.is_not_nil())
{
if(!cpp_is_pod(symbol.type))
{
block_dini.move_to_operands(symbol.value);
}
else
{
exprt symbexpr("symbol", symbol.type);
symbexpr.identifier(symbol.name);
codet code;
code.set_statement("assign");
code.copy_to_operands(symbexpr, symbol.value);
code.location() = symbol.location;
if(symbol.value.id() == "constant")
block_sini.move_to_operands(code);
else
block_dini.move_to_operands(code);
}
// Make it nil because we do not want
// global_init to try to initialize the
// object
symbol.value.make_nil();
}
else
{
exprt::operandst ops;
codet call = cpp_constructor(locationt(), symexpr, ops);
if(call.is_not_nil())
block_dini.move_to_operands(call);
}
}
block_sini.move_to_operands(block_dini);
// Create the initialization procedure
symbolt init_symbol;
init_symbol.name = "#ini#" + id2string(module);
init_symbol.base_name = "#ini#" + id2string(module);
init_symbol.value.swap(block_sini);
init_symbol.mode = current_mode;
init_symbol.module = module;
init_symbol.type = code_typet();
init_symbol.type.add("return_type") = typet("empty");
init_symbol.type.set("initialization", true);
init_symbol.is_type = false;
init_symbol.is_macro = false;
context.move(init_symbol);
disable_access_control = false;
}
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::convert_anonymous_union(
cpp_declarationt &declaration,
codet &code)
{
codet new_code(ID_decl_block);
new_code.reserve_operands(declaration.declarators().size());
// unnamed object
std::string identifier="#anon_union"+i2string(anon_counter++);
irept name(ID_name);
name.set(ID_identifier, identifier);
name.set(ID_C_source_location, declaration.source_location());
cpp_namet cpp_name;
cpp_name.move_to_sub(name);
cpp_declaratort declarator;
declarator.name()=cpp_name;
cpp_declarator_convertert cpp_declarator_converter(*this);
const symbolt &symbol=
cpp_declarator_converter.convert(declaration, declarator);
if(!cpp_is_pod(declaration.type()))
{
error().source_location=follow(declaration.type()).source_location();
error() << "anonymous union is not POD" << eom;
throw 0;
}
codet decl_statement(ID_decl);
decl_statement.reserve_operands(2);
decl_statement.copy_to_operands(cpp_symbol_expr(symbol));
new_code.move_to_operands(decl_statement);
// do scoping
symbolt union_symbol=symbol_table.symbols[follow(symbol.type).get(ID_name)];
const irept::subt &components=union_symbol.type.add(ID_components).get_sub();
forall_irep(it, components)
{
if(it->find(ID_type).id()==ID_code)
{
error().source_location=union_symbol.type.source_location();
error() << "anonymous union `" << union_symbol.base_name
<< "' shall not have function members" << eom;
throw 0;
}
const irep_idt &base_name=it->get(ID_base_name);
if(cpp_scopes.current_scope().contains(base_name))
{
error().source_location=union_symbol.type.source_location();
error() << "identifier `" << base_name << "' already in scope"
<< eom;
throw 0;
}
cpp_idt &id=cpp_scopes.current_scope().insert(base_name);
id.id_class = cpp_idt::SYMBOL;
id.identifier=it->get(ID_name);
id.class_identifier=union_symbol.name;
id.is_member=true;
}
symbol_table.symbols[union_symbol.name].type.set(
"#unnamed_object", symbol.base_name);
code.swap(new_code);
}
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);
}
}