SymEngine::MExprPoly Class Reference

Inheritance diagram for SymEngine::MExprPoly:

Collaboration diagram for SymEngine::MExprPoly:

Public Member Functions
	MExprPoly (const set_basic &vars, MExprDict &&dict)
void	accept (Visitor &v) const override
void	accept (EvalRealDoubleVisitorFinal &v) const override
hash_t	__hash__ () const override
RCP< const Basic >	as_symbolic () const
Expression	eval (std::map< RCP< const Basic >, Expression, RCPBasicKeyLess > &vals) const
Public Member Functions inherited from SymEngine::MSymEnginePoly< MExprDict, MExprPoly >
	MSymEnginePoly (const set_basic &vars, MExprDict &&dict)
int	compare (const Basic &o) const override
vec_basic	get_args () const override
	Returns the list of arguments.
const MExprDict &	get_poly () const
const set_basic &	get_vars () const
bool	__eq__ (const Basic &o) const override
	Test equality.
Public Member Functions inherited from SymEngine::Basic
TypeID	get_type_code () const
	Basic ()
	Constructor.
	Basic (const Basic &)=delete
	Delete the copy constructor and assignment.
Basic &	operator= (const Basic &)=delete
	Assignment operator in continuation with above.
	Basic (Basic &&)=delete
	Delete the move constructor and assignment.
Basic &	operator= (Basic &&)=delete
	Assignment operator in continuation with above.
virtual hash_t	__hash__ () const =0
hash_t	hash () const
virtual bool	__eq__ (const Basic &o) const =0
	Test equality.
bool	__neq__ (const Basic &o) const
	true if this is not equal to o.
int	__cmp__ (const Basic &o) const
	Comparison operator.
virtual int	compare (const Basic &o) const =0
std::string	__str__ () const
std::string	dumps () const
	Returns a string of the instance serialized.
RCP< const Basic >	subs (const map_basic_basic &subs_dict) const
	Substitutes 'subs_dict' into 'self'.
RCP< const Basic >	xreplace (const map_basic_basic &subs_dict) const
virtual RCP< const Basic >	expand_as_exp () const
	expands the special function in terms of exp function
virtual vec_basic	get_args () const =0
	Returns the list of arguments.
virtual void	accept (Visitor &v) const =0
virtual void	accept (EvalRealDoubleVisitorFinal &v) const =0
RCP< const Basic >	diff (const RCP< const Symbol > &x, bool cache=true) const
Public Member Functions inherited from SymEngine::EnableRCPFromThis< Basic >
RCP< Basic >	rcp_from_this ()
	Get RCP<T> pointer to self (it will cast the pointer to T)
RCP< const Basic >	rcp_from_this () const
	Get RCP<const T> pointer to self (it will cast the pointer to const T)
RCP< const T2 >	rcp_from_this_cast () const
	Get RCP<T2> pointer to self (it will cast the pointer to T2)
unsigned int	use_count () const

Static Public Attributes
static const TypeID	type_code_id = SYMENGINE_MEXPRPOLY

Additional Inherited Members
Public Types inherited from SymEngine::MSymEnginePoly< MExprDict, MExprPoly >
typedef MExprDict	container_type
typedef Container::coef_type	coef_type
Static Public Member Functions inherited from SymEngine::MSymEnginePoly< MExprDict, MExprPoly >
static RCP< const MExprPoly >	from_container (const set_basic &vars, MExprDict &&d)
static enable_if_t< is_a_UPoly< FromPoly >::value, RCP< const MExprPoly > >	from_poly (const FromPoly &p)
static RCP< const MExprPoly >	from_dict (const vec_basic &v, typename Container::dict_type &&d)
static MExprDict	container_from_dict (const set_basic &s, typename Container::dict_type &&d)
Static Public Member Functions inherited from SymEngine::Basic
static RCP< const Basic >	loads (const std::string &)
	Creates an instance of a serialized string.
Data Fields inherited from SymEngine::Basic
TypeID	type_code_

Detailed Description

Definition at line 454 of file msymenginepoly.h.

Constructor & Destructor Documentation

MExprPoly()

SymEngine::MExprPoly::MExprPoly ( const set_basic &  vars, MExprDict &&  dict  )

inline

Definition at line 457 of file msymenginepoly.h.

        : MSymEnginePoly(vars, std::move(dict)){SYMENGINE_ASSIGN_TYPEID()}

Member Function Documentation

__hash__()

hash_t SymEngine::MExprPoly::__hash__ ( ) const

overridevirtual

Calculates the hash of the given SymEngine class. Use Basic.hash() which gives a cached version of the hash.

Returns

64-bit integer value for the hash

Implements SymEngine::Basic.

Definition at line 70 of file msymenginepoly.cpp.

{
    hash_t seed = SYMENGINE_MEXPRPOLY;
    for (auto var : get_vars())
        hash_combine<std::string>(seed, var->__str__());
 
    for (auto &p : get_poly().dict_) {
        hash_t t = vec_hash<vec_int>()(p.first);
        hash_combine<Basic>(t, *(p.second.get_basic()));
        seed ^= t;
    }
    return seed;
}

accept() [1/2]

void SymEngine::MExprPoly::accept ( EvalRealDoubleVisitorFinal &  v ) const

overridevirtual

Implements SymEngine::Basic.

accept() [2/2]

void SymEngine::MExprPoly::accept ( Visitor &  v ) const

overridevirtual

Implements SymEngine::Basic.

as_symbolic()

RCP< const Basic > SymEngine::MExprPoly::as_symbolic

(

)

const

Definition at line 54 of file msymenginepoly.cpp.

{
    vec_basic args;
    for (const auto &p : get_poly().dict_) {
        RCP<const Basic> res = (p.second.get_basic());
        int whichvar = 0;
        for (auto sym : get_vars()) {
            if (0 != p.first[whichvar])
                res = SymEngine::mul(res, pow(sym, integer(p.first[whichvar])));
            whichvar++;
        }
        args.push_back(res);
    }
    return SymEngine::add(args);
}

eval()

Expression SymEngine::MExprPoly::eval

(

std::map< RCP< const Basic >, Expression, RCPBasicKeyLess > &

vals

)

const

Definition at line 84 of file msymenginepoly.cpp.

{
    // TODO : handle missing values
    Expression ans(0);
    for (auto bucket : get_poly().dict_) {
        Expression term = bucket.second;
        unsigned int whichvar = 0;
        for (auto sym : get_vars()) {
            term *= pow(vals.find(sym)->second, bucket.first[whichvar]);
            whichvar++;
        }
        ans += term;
    }
    return ans;
}

Field Documentation

type_code_id

const TypeID SymEngine::MExprPoly::type_code_id = SYMENGINE_MEXPRPOLY

static

Type_code_id shared by all instances

Definition at line 460 of file msymenginepoly.h.

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The documentation for this class was generated from the following files:

• /home/runner/work/symengine/symengine/symengine/polys/msymenginepoly.h
• /home/runner/work/symengine/symengine/symengine/polys/msymenginepoly.cpp