void c_typecheck_baset::typecheck_declaration(
ansi_c_declarationt &declaration)
{
if(declaration.get_is_static_assert())
{
assert(declaration.operands().size()==2);
typecheck_expr(declaration.op0());
typecheck_expr(declaration.op1());
}
else
{
// get storage spec
c_storage_spect c_storage_spec(declaration.type());
declaration.set_is_inline(c_storage_spec.is_inline);
declaration.set_is_static(c_storage_spec.is_static);
declaration.set_is_extern(c_storage_spec.is_extern);
declaration.set_is_thread_local(c_storage_spec.is_thread_local);
declaration.set_is_register(c_storage_spec.is_register);
declaration.set_is_typedef(c_storage_spec.is_typedef);
// first typecheck the type of the declaration
typecheck_type(declaration.type());
// mark as 'already typechecked'
make_already_typechecked(declaration.type());
// Now do declarators, if any.
for(ansi_c_declarationt::declaratorst::iterator
d_it=declaration.declarators().begin();
d_it!=declaration.declarators().end();
d_it++)
{
symbolt symbol;
declaration.to_symbol(*d_it, symbol);
// now check other half of type
typecheck_type(symbol.type);
typecheck_symbol(symbol);
}
}
}
void c_typecheck_baset::typecheck_declaration(
ansi_c_declarationt &declaration)
{
if(declaration.get_is_static_assert())
{
assert(declaration.operands().size()==2);
typecheck_expr(declaration.op0());
typecheck_expr(declaration.op1());
}
else
{
// get storage spec
c_storage_spect c_storage_spec(declaration.type());
// first typecheck the type of the declaration
typecheck_type(declaration.type());
// mark as 'already typechecked'
make_already_typechecked(declaration.type());
codet contract;
{
exprt spec_requires=
static_cast<const exprt&>(declaration.find(ID_C_spec_requires));
contract.add(ID_C_spec_requires).swap(spec_requires);
exprt spec_ensures=
static_cast<const exprt&>(declaration.find(ID_C_spec_ensures));
contract.add(ID_C_spec_ensures).swap(spec_ensures);
}
// Now do declarators, if any.
for(ansi_c_declarationt::declaratorst::iterator
d_it=declaration.declarators().begin();
d_it!=declaration.declarators().end();
d_it++)
{
c_storage_spect full_spec(declaration.full_type(*d_it));
full_spec|=c_storage_spec;
declaration.set_is_inline(full_spec.is_inline);
declaration.set_is_static(full_spec.is_static);
declaration.set_is_extern(full_spec.is_extern);
declaration.set_is_thread_local(full_spec.is_thread_local);
declaration.set_is_register(full_spec.is_register);
declaration.set_is_typedef(full_spec.is_typedef);
declaration.set_is_weak(full_spec.is_weak);
symbolt symbol;
declaration.to_symbol(*d_it, symbol);
current_symbol=symbol;
// now check other half of type
typecheck_type(symbol.type);
if(!full_spec.alias.empty())
{
if(symbol.value.is_not_nil())
{
error().source_location=symbol.location;
error() << "alias attribute cannot be used with a body"
<< eom;
throw 0;
}
// alias function need not have been declared yet, thus
// can't lookup
symbol.value=symbol_exprt(full_spec.alias);
symbol.is_macro=true;
}
if(full_spec.section.empty())
apply_asm_label(full_spec.asm_label, symbol);
else
{
std::string asm_name;
asm_name=id2string(full_spec.section)+"$$";
if(!full_spec.asm_label.empty())
asm_name+=id2string(full_spec.asm_label);
else
asm_name+=id2string(symbol.name);
apply_asm_label(asm_name, symbol);
}
irep_idt identifier=symbol.name;
d_it->set_name(identifier);
typecheck_symbol(symbol);
// add code contract (if any); we typecheck this after the
// function body done above, so as to have parameter symbols
// available
symbol_tablet::symbolst::iterator s_it=
symbol_table.symbols.find(identifier);
assert(s_it!=symbol_table.symbols.end());
symbolt &new_symbol=s_it->second;
typecheck_spec_expr(contract, ID_C_spec_requires);
typet ret_type=empty_typet();
if(new_symbol.type.id()==ID_code)
ret_type=to_code_type(new_symbol.type).return_type();
assert(parameter_map.empty());
if(ret_type.id()!=ID_empty)
parameter_map["__CPROVER_return_value"]=ret_type;
typecheck_spec_expr(contract, ID_C_spec_ensures);
parameter_map.clear();
if(contract.find(ID_C_spec_requires).is_not_nil())
new_symbol.type.add(ID_C_spec_requires)=
contract.find(ID_C_spec_requires);
if(contract.find(ID_C_spec_ensures).is_not_nil())
new_symbol.type.add(ID_C_spec_ensures)=
contract.find(ID_C_spec_ensures);
}
}
}