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Add goto_trace_constant_pointer_exprt #5034

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Merged
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Aug 19, 2019
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Add goto_trace_constant_pointer_exprt #5034

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24 changes: 24 additions & 0 deletions src/goto-programs/goto_trace.h
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Original file line number Diff line number Diff line change
Expand Up @@ -292,4 +292,28 @@ void show_goto_trace(
if(cmdline.isset("stack-trace")) \
options.set_option("stack-trace", true);

/// Variety of constant expression only used in the context of a GOTO trace, to
/// give both the numeric value and the symbolic value of a pointer.
class goto_trace_constant_pointer_exprt : public constant_exprt
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I think this clarifies some things. But could you add what you put in the PR description as a documentation here to make it even clearer.

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#5037

{
public:
const exprt &symbolic_pointer() const
{
return static_cast<const exprt &>(operands()[0]);
}
};

template <>
inline bool can_cast_expr<goto_trace_constant_pointer_exprt>(const exprt &base)
{
return can_cast_expr<constant_exprt>(base) && base.operands().size() == 1;
}

inline const goto_trace_constant_pointer_exprt &
to_goto_trace_constant_pointer_expr(const exprt &expr)
{
PRECONDITION(can_cast_expr<goto_trace_constant_pointer_exprt>(expr));
return static_cast<const goto_trace_constant_pointer_exprt &>(expr);
}

#endif // CPROVER_GOTO_PROGRAMS_GOTO_TRACE_H