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ChaiScript/include/chaiscript/dispatchkit/bootstrap.hpp
Jason Turner 9cf5064a3b Merge branch 'master' into ChaiScript_5_0_CPP_11 
Conflicts:
	include/chaiscript/dispatchkit/bootstrap.hpp
	include/chaiscript/dispatchkit/proxy_functions_detail.hpp
	src/reflection.cpp
2014-02-22 16:41:28 -07:00

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// This file is distributed under the BSD License.
// See "license.txt" for details.
// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
// Copyright 2009-2014, Jason Turner (jason@emptycrate.com)
// http://www.chaiscript.com
#ifndef CHAISCRIPT_BOOTSTRAP_HPP_
#define CHAISCRIPT_BOOTSTRAP_HPP_
#include "dispatchkit.hpp"
#include "dynamic_object.hpp"
#include "register_function.hpp"
#include "operators.hpp"
#include "boxed_number.hpp"
#include <sstream>
#include <type_traits>
namespace chaiscript
{
/// \brief Classes and functions useful for bootstrapping of ChaiScript and adding of new types
namespace bootstrap
{
namespace detail
{
/// \brief Constructs a new POD value object from a Boxed_Number
/// \param[in] v Boxed_Number to copy into the new object
/// \returns The newly created object.
template<typename P1>
std::shared_ptr<P1> construct_pod(Boxed_Number v)
{
std::shared_ptr<P1> p(new P1());
Boxed_Value bv(p);
Boxed_Number nb(bv);
nb = v;
return p;
}
}
/// \brief Adds a copy constructor for the given type to the given Model
/// \param[in] type The name of the type. The copy constructor will be named "type".
/// \param[in,out] m The Module to add the copy constructor to
/// \tparam T The type to add a copy constructor for
/// \returns The passed in ModulePtr, or the newly constructed one if the default param is used
template<typename T>
ModulePtr copy_constructor(const std::string &type, ModulePtr m = ModulePtr(new Module()))
{
m->add(constructor<T (const T &)>(), type);
return m;
}
/// \brief Add all comparison operators for the templated type. Used during bootstrap, also available to users.
/// \tparam T Type to create comparison operators for
/// \param[in,out] m module to add comparison operators to
/// \returns the passed in ModulePtr or the newly constructed one if the default params are used.
template<typename T>
ModulePtr opers_comparison(ModulePtr m = ModulePtr(new Module()))
{
operators::equal<T>(m);
operators::greater_than<T>(m);
operators::greater_than_equal<T>(m);
operators::less_than<T>(m);
operators::less_than_equal<T>(m);
operators::not_equal<T>(m);
return m;
}
/// \brief Adds default and copy constructors for the given type
/// \param[in] type The name of the type to add the constructors for.
/// \param[in,out] m The Module to add the basic constructors to
/// \tparam T Type to generate basic constructors for
/// \returns The passed in ModulePtr, or the newly constructed one if the default param is used
/// \sa copy_constructor
/// \sa constructor
template<typename T>
ModulePtr basic_constructors(const std::string &type, ModulePtr m = ModulePtr(new Module()))
{
m->add(constructor<T ()>(), type);
copy_constructor<T>(type, m);
return m;
}
/// \brief Adds a constructor for a POD type
/// \tparam T The type to add the constructor for
/// \param[in] type The name of the type
/// \param[in,out] m The Module to add the constructor to
template<typename T>
ModulePtr construct_pod(const std::string &type, ModulePtr m = ModulePtr(new Module()))
{
m->add(fun(&detail::construct_pod<T>), type);
return m;
}
/**
* to_string function for internal use. Uses ostream operator<<
*/
template<typename Input>
std::string to_string(Input i)
{
std::stringstream ss;
ss << i;
return ss.str();
}
/**
* Internal function for converting from a string to a value
* uses ostream operator >> to perform the conversion
*/
template<typename Input>
Input parse_string(const std::string &i)
{
std::stringstream ss(i);
Input t;
ss >> t;
return t;
}
/**
* Add all common functions for a POD type. All operators, and
* common conversions
*/
template<typename T>
ModulePtr bootstrap_pod_type(const std::string &name, ModulePtr m = ModulePtr(new Module()))
{
m->add(user_type<T>(), name);
m->add(constructor<T ()>(), name);
construct_pod<T>(name, m);
m->add(fun(&to_string<T>), "to_string");
m->add(fun(&parse_string<T>), "to_" + name);
return m;
}
/**
* "clone" function for a shared_ptr type. This is used in the case
* where you do not want to make a deep copy of an object during cloning
* but want to instead maintain the shared_ptr. It is needed internally
* for handling of Proxy_Function object (that is,
* function variables.
*/
template<typename Type>
std::shared_ptr<Type> shared_ptr_clone(const std::shared_ptr<Type> &p)
{
return p;
}
/**
* Specific version of shared_ptr_clone just for Proxy_Functions
*/
template<typename Type>
std::shared_ptr<typename std::remove_const<Type>::type>
shared_ptr_unconst_clone(const std::shared_ptr<typename std::add_const<Type>::type> &p)
{
return std::const_pointer_cast<typename std::remove_const<Type>::type>(p);
}
/**
* Assignment function for shared_ptr objects, does not perform a copy of the
* object pointed to, instead maintains the shared_ptr concept.
* Similar to shared_ptr_clone. Used for Proxy_Function.
*/
template<typename Type>
Boxed_Value ptr_assign(Boxed_Value lhs, const std::shared_ptr<Type> &rhs)
{
if (lhs.is_undef()
|| (!lhs.get_type_info().is_const() && lhs.get_type_info().bare_equal(chaiscript::detail::Get_Type_Info<Type>::get())))
{
lhs.assign(Boxed_Value(rhs));
return lhs;
} else {
throw exception::bad_boxed_cast("type mismatch in pointer assignment");
}
}
/**
* Class consisting of only static functions. All default bootstrapping occurs
* from this class.
*/
class Bootstrap
{
private:
/**
* Function allowing for assignment of an unknown type to any other value
*/
static Boxed_Value unknown_assign(Boxed_Value lhs, Boxed_Value rhs)
{
if (lhs.is_undef())
{
return (lhs.assign(rhs));
} else {
throw exception::bad_boxed_cast("boxed_value has a set type already");
}
}
static void print(const std::string &s)
{
std::cout << s;
}
static void println(const std::string &s)
{
std::cout << s << std::endl;
}
/**
* Add all arithmetic operators for PODs
*/
static void opers_arithmetic_pod(ModulePtr m = ModulePtr(new Module()))
{
m->add(fun(&Boxed_Number::equals), "==");
m->add(fun(&Boxed_Number::less_than), "<");
m->add(fun(&Boxed_Number::greater_than), ">");
m->add(fun(&Boxed_Number::greater_than_equal), ">=");
m->add(fun(&Boxed_Number::less_than_equal), "<=");
m->add(fun(&Boxed_Number::not_equal), "!=");
m->add(fun(&Boxed_Number::pre_decrement), "--");
m->add(fun(&Boxed_Number::pre_increment), "++");
m->add(fun(&Boxed_Number::sum), "+");
m->add(fun(&Boxed_Number::unary_plus), "+");
m->add(fun(&Boxed_Number::unary_minus), "-");
m->add(fun(&Boxed_Number::difference), "-");
m->add(fun(&Boxed_Number::assign_bitwise_and), "&=");
m->add(fun(&Boxed_Number::assign), "=");
m->add(fun(&Boxed_Number::assign_bitwise_or), "|=");
m->add(fun(&Boxed_Number::assign_bitwise_xor), "^=");
m->add(fun(&Boxed_Number::assign_remainder), "%=");
m->add(fun(&Boxed_Number::assign_shift_left), "<<=");
m->add(fun(&Boxed_Number::assign_shift_right), ">>=");
m->add(fun(&Boxed_Number::bitwise_and), "&");
m->add(fun(&Boxed_Number::bitwise_complement), "~");
m->add(fun(&Boxed_Number::bitwise_xor), "^");
m->add(fun(&Boxed_Number::bitwise_or), "|");
m->add(fun(&Boxed_Number::assign_product), "*=");
m->add(fun(&Boxed_Number::assign_quotient), "/=");
m->add(fun(&Boxed_Number::assign_sum), "+=");
m->add(fun(&Boxed_Number::assign_difference), "-=");
m->add(fun(&Boxed_Number::quotient), "/");
m->add(fun(&Boxed_Number::shift_left), "<<");
m->add(fun(&Boxed_Number::product), "*");
m->add(fun(&Boxed_Number::remainder), "%");
m->add(fun(&Boxed_Number::shift_right), ">>");
}
/**
* Create a bound function object. The first param is the function to bind
* the remaining parameters are the args to bind into the
* result
*/
static Boxed_Value bind_function(const std::vector<Boxed_Value> &params)
{
if (params.size() < 2)
{
throw exception::arity_error(static_cast<int>(params.size()), 2);
}
Const_Proxy_Function f = boxed_cast<Const_Proxy_Function>(params[0]);
return Boxed_Value(Const_Proxy_Function(new dispatch::Bound_Function(f,
std::vector<Boxed_Value>(params.begin() + 1, params.end()))));
}
static bool has_guard(const Const_Proxy_Function &t_pf)
{
auto pf = std::dynamic_pointer_cast<const dispatch::Dynamic_Proxy_Function>(t_pf);
if (pf)
{
if (pf->get_guard()) {
return true;
} else {
return false;
}
} else {
return false;
}
}
static Const_Proxy_Function get_guard(const Const_Proxy_Function &t_pf)
{
auto pf = std::dynamic_pointer_cast<const dispatch::Dynamic_Proxy_Function>(t_pf);
if (pf)
{
if (pf->get_guard())
{
return pf->get_guard();
} else {
throw std::runtime_error("Function does not have a guard");
}
} else {
throw std::runtime_error("Function does not have a guard");
}
}
static void throw_exception(const Boxed_Value &bv) {
throw bv;
}
static std::shared_ptr<chaiscript::detail::Dispatch_Engine> bootstrap2(
std::shared_ptr<chaiscript::detail::Dispatch_Engine> e
= std::shared_ptr<chaiscript::detail::Dispatch_Engine> (new chaiscript::detail::Dispatch_Engine()))
{
e->add(user_type<void>(), "void");
return e;
}
static std::string what(const std::exception &e)
{
return e.what();
}
/**
* Boolean specialization of internal to_string function
*/
static std::string bool_to_string(bool b)
{
if (b)
{
return "true";
} else {
return "false";
}
}
template<typename FunctionType>
static std::vector<Boxed_Value> do_return_boxed_value_vector(FunctionType f,
const dispatch::Proxy_Function_Base *b)
{
auto v = (b->*f)();
std::vector<Boxed_Value> vbv;
for (const auto &o: v)
{
vbv.push_back(const_var(o));
}
return vbv;
}
template<typename Function>
static std::function<std::vector<Boxed_Value> (const dispatch::Proxy_Function_Base*)> return_boxed_value_vector(const Function &f)
{
return std::bind(&do_return_boxed_value_vector<Function>, f, std::placeholders::_1);
}
public:
/// \brief perform all common bootstrap functions for std::string, void and POD types
/// \param[in,out] m Module to add bootstrapped functions to
/// \returns passed in ModulePtr, or newly created one if default argument is used
static ModulePtr bootstrap(ModulePtr m = ModulePtr(new Module()))
{
m->add(user_type<void>(), "void");
m->add(user_type<bool>(), "bool");
m->add(user_type<Boxed_Value>(), "Object");
m->add(user_type<Boxed_Number>(), "Number");
m->add(user_type<Proxy_Function>(), "Function");
m->add(user_type<std::exception>(), "exception");
m->add(fun(&dispatch::Proxy_Function_Base::get_arity), "get_arity");
m->add(fun(&dispatch::Proxy_Function_Base::annotation), "get_annotation");
m->add(fun(&dispatch::Proxy_Function_Base::operator==), "==");
m->add(fun(return_boxed_value_vector(&dispatch::Proxy_Function_Base::get_param_types)), "get_param_types");
m->add(fun(return_boxed_value_vector(&dispatch::Proxy_Function_Base::get_contained_functions)), "get_contained_functions");
m->add(user_type<std::runtime_error>(), "runtime_error");
m->add(chaiscript::base_class<std::exception, std::runtime_error>());
m->add(constructor<std::runtime_error (const std::string &)>(), "runtime_error");
m->add(fun(std::function<std::string (const std::runtime_error &)>(&what)), "what");
m->add(user_type<dispatch::Dynamic_Object>(), "Dynamic_Object");
m->add(constructor<dispatch::Dynamic_Object (const std::string &)>(), "Dynamic_Object");
m->add(fun(&dispatch::Dynamic_Object::get_type_name), "get_type_name");
m->add(fun(&dispatch::Dynamic_Object::get_attrs), "get_attrs");
m->add(fun(&dispatch::Dynamic_Object::get_attr), "get_attr");
m->eval("def Dynamic_Object::clone() { auto &new_o = Dynamic_Object(this.get_type_name()); for_each(this.get_attrs(), bind(fun(new_o, x) { new_o.get_attr(x.first) = x.second; }, new_o, _) ); return new_o; }");
m->add(fun(&has_guard), "has_guard");
m->add(fun(&get_guard), "get_guard");
m->add(fun(&Boxed_Value::is_undef), "is_var_undef");
m->add(fun(&Boxed_Value::is_null), "is_var_null");
m->add(fun(&Boxed_Value::is_const), "is_var_const");
m->add(fun(&Boxed_Value::is_ref), "is_var_reference");
m->add(fun(&Boxed_Value::is_pointer), "is_var_pointer");
m->add(fun(&Boxed_Value::is_type), "is_type");
m->add(fun(&Boxed_Value::get_type_info), "get_type_info");
m->add(user_type<Type_Info>(), "Type_Info");
operators::equal<Type_Info>(m);
m->add(fun(&Type_Info::is_const), "is_type_const");
m->add(fun(&Type_Info::is_reference), "is_type_reference");
m->add(fun(&Type_Info::is_void), "is_type_void");
m->add(fun(&Type_Info::is_undef), "is_type_undef");
m->add(fun(&Type_Info::is_pointer), "is_type_pointer");
m->add(fun(&Type_Info::is_arithmetic), "is_type_arithmetic");
m->add(fun(&Type_Info::name), "cpp_name");
m->add(fun(&Type_Info::bare_name), "cpp_bare_name");
m->add(fun(&Type_Info::bare_equal), "bare_equal");
basic_constructors<bool>("bool", m);
operators::assign<bool>(m);
operators::equal<bool>(m);
m->add(fun(&to_string<const std::string &>), "internal_to_string");
m->add(fun(&Bootstrap::bool_to_string), "internal_to_string");
m->add(fun(&unknown_assign), "=");
m->add(fun(&throw_exception), "throw");
m->add(fun(&what), "what");
bootstrap_pod_type<double>("double", m);
bootstrap_pod_type<long double>("long_double", m);
bootstrap_pod_type<float>("float", m);
bootstrap_pod_type<int>("int", m);
bootstrap_pod_type<long>("long", m);
bootstrap_pod_type<unsigned int>("unsigned_int", m);
bootstrap_pod_type<unsigned long>("unsigned_long", m);
bootstrap_pod_type<size_t>("size_t", m);
bootstrap_pod_type<char>("char", m);
bootstrap_pod_type<std::int8_t>("int8_t", m);
bootstrap_pod_type<std::int16_t>("int16_t", m);
bootstrap_pod_type<std::int32_t>("int32_t", m);
bootstrap_pod_type<std::int64_t>("int64_t", m);
bootstrap_pod_type<std::uint8_t>("uint8_t", m);
bootstrap_pod_type<std::uint16_t>("uint16_t", m);
bootstrap_pod_type<std::uint32_t>("uint32_t", m);
bootstrap_pod_type<std::uint64_t>("uint64_t", m);
operators::logical_compliment<bool>(m);
opers_arithmetic_pod(m);
m->add(fun(&print), "print_string");
m->add(fun(&println), "println_string");
m->add(Proxy_Function(new dispatch::Dynamic_Proxy_Function(std::bind(&bind_function, std::placeholders::_1))),
"bind");
m->add(fun(&shared_ptr_unconst_clone<dispatch::Proxy_Function_Base>), "clone");
m->add(fun(&ptr_assign<std::remove_const<dispatch::Proxy_Function_Base>::type>), "=");
m->add(fun(&ptr_assign<std::add_const<dispatch::Proxy_Function_Base>::type>), "=");
m->add(fun(&Boxed_Value::type_match), "type_match");
return m;
}
};
}
}
#endif
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