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#pragma once
#include <functional>
#include "Props.hh"
/// \ingroup core
///
/// Cadabra kernel that keeps all state information that needs to be passed
/// around to algorithms and properties. Stores property information and
/// global settings.
namespace cadabra {
class Kernel {
public:
Kernel(bool inject_defaults=true);
Kernel(const Kernel& other) = delete;
~Kernel();
/// Inject a property into the system and attach it to the given pattern.
void inject_property(property *prop, std::shared_ptr<Ex> pattern, std::shared_ptr<Ex> property_arguments);
/// Create an Ex expression object from a string, which will be parsed.
std::shared_ptr<Ex> ex_from_string(const std::string&);
Properties properties;
/// Settings.
enum class scalar_backend_t { sympy, mathematica } scalar_backend;
bool call_embedded_python_functions;
bool display_fractions;
const static std::string version;
const static std::string build ;
// Warnings
enum class warn_t {
notset = 0,
debug = 10,
info = 20,
warning = 30,
error = 40,
critical = 50
};
warn_t warning_level;
std::function<void(const std::string&)> warning_callback;
void warn(const std::string& msg, warn_t level = warn_t::warning) const;
};
}
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