CGII/framework/include/cgv/signal/bool_combiner.h

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2018-05-17 13:50:03 +00:00
#pragma once
#include "lib_begin.h"
namespace cgv {
namespace signal {
/// base class for signals that combine the boolean result of the attached functors with boolean and/or operations
class CGV_API bool_combiner
{
protected:
bool combine_result(bool new_value, bool& value) const;
bool combine_with_and;
bool short_circuit;
public:
//! construct from option string.
/*! The option string can be composed of the following characters:
- '&' ... combine with logical and
- '|' ... combine with logical or
- '*' ... short-circuit evaluation of boolean expression
- '+' ... full evaluation
*/
bool_combiner(const char* opt);
/// return the neutral bool value with which one can initialize the result variable
bool get_neutral_value() const;
/// set a different option string
void set_options(const char* opt);
/// return whether combination is done with the boolean and operation
bool is_combination_with_and() const;
/// return whether to perform short-circuit evaluation
bool is_evaluation_short_circuit() const;
};
}
}
#include <cgv/config/lib_end.h>