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#ifndef _SCOPE_EXECUTE_H
#define _SCOPE_EXECUTE_H
template <typename T>
class scoped_variable : public boost::noncopyable
{
T& var;
T prev;
bool enabled;
public:
explicit scoped_variable(T& _var)
: var(_var), prev(var), enabled(true) {}
explicit scoped_variable(T& _var, const T& value)
: var(_var), prev(var), enabled(true) {
var = value;
}
~scoped_variable() {
if (enabled)
var = prev;
}
void clear() {
enabled = false;
}
};
template <typename T>
class scoped_execute : public boost::noncopyable
{
typedef boost::function<void (T)> function_t;
function_t code;
T arg;
bool enabled;
public:
explicit scoped_execute(const function_t& _code, T _arg)
: code(_code), arg(_arg), enabled(true) {}
~scoped_execute() {
if (enabled)
code(arg);
}
void clear() {
enabled = false;
}
};
template <>
class scoped_execute<void> : public boost::noncopyable
{
typedef boost::function<void ()> function_t;
function_t code;
bool enabled;
public:
explicit scoped_execute(const function_t& _code)
: code(_code), enabled(true) {}
~scoped_execute() {
if (enabled)
code();
}
void clear() {
enabled = false;
}
};
#endif // _SCOPE_EXECUTE_H
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