cprover
destructor.cpp
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1 /*******************************************************************\
2 
3 Module: Destructor Calls
4 
5 Author: Daniel Kroening, kroening@kroening.com
6 
7 \*******************************************************************/
8 
11 
12 #include "destructor.h"
13 
14 #include <util/std_expr.h>
15 #include <util/std_types.h>
16 #include <util/std_code.h>
17 
19  const namespacet &ns,
20  const typet &type)
21 {
22  if(type.id() == ID_symbol_type)
23  {
24  return get_destructor(ns, ns.follow(type));
25  }
26  else if(type.id()==ID_struct)
27  {
28  const exprt &methods=static_cast<const exprt&>(type.find(ID_methods));
29 
30  forall_operands(it, methods)
31  {
32  if(it->type().id()==ID_code)
33  {
34  const code_typet &code_type=to_code_type(it->type());
35 
36  if(code_type.return_type().id()==ID_destructor &&
37  code_type.parameters().size()==1)
38  {
39  const typet &arg_type=code_type.parameters().front().type();
40 
41  if(arg_type.id()==ID_pointer &&
42  ns.follow(arg_type.subtype())==type)
43  {
44  const symbol_exprt symbol_expr(it->get(ID_name), it->type());
45  return code_function_callt(symbol_expr);
46  }
47  }
48  }
49  }
50  }
51 
52  return static_cast<const code_function_callt &>(get_nil_irep());
53 }
const irept & get_nil_irep()
Definition: irep.cpp:55
The type of an expression, extends irept.
Definition: type.h:27
Base type of functions.
Definition: std_types.h:751
const code_typet & to_code_type(const typet &type)
Cast a typet to a code_typet.
Definition: std_types.h:982
Destructor Calls.
typet & type()
Return the type of the expression.
Definition: expr.h:68
const irep_idt & id() const
Definition: irep.h:259
API to expression classes.
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition: namespace.h:93
codet representation of a function call statement.
Definition: std_code.h:1036
#define forall_operands(it, expr)
Definition: expr.h:20
const typet & follow(const typet &) const
Resolve type symbol to the type it points to.
Definition: namespace.cpp:62
Pre-defined types.
Base class for all expressions.
Definition: expr.h:54
const parameterst & parameters() const
Definition: std_types.h:893
Expression to hold a symbol (variable)
Definition: std_expr.h:143
code_function_callt get_destructor(const namespacet &ns, const typet &type)
Definition: destructor.cpp:18
const typet & subtype() const
Definition: type.h:38
const irept & find(const irep_namet &name) const
Definition: irep.cpp:284
const typet & return_type() const
Definition: std_types.h:883