ExpressionVector.h File Reference

($Id: ExpressionVector.h 1351 2013-03-08 15:12:28Z arr $)

Class CXXR::ExpressionVector and associated C interface. More...

#include "CXXR/VectorBase.h"
#include "CXXR/FixedVector.hpp"
#include "CXXR/SEXP_downcast.hpp"

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Namespaces
namespace	CXXR
	Namespace for the CXXR project.

Typedefs
typedef FixedVector< RHandle <>, EXPRSXP >	CXXR::ExpressionVector
	Expression vector.

Functions
Rboolean	Rf_isExpression (SEXP s)
SEXP	SET_XVECTOR_ELT (SEXP x, int i, SEXP v)
	Set element of CXXR::ExpressionVector.
SEXP	XVECTOR_ELT (SEXP x, int i)
	Examine element of a CXXR::ExpressionVector.

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Detailed Description

Class CXXR::ExpressionVector and associated C interface.

(CXXR::ExpressionVector implements EXPRSXP.)

Todo:

Constrain the elements to be Expression objects? However, as currently used, the elements of an ExpressionVector may be Symbols rather than Expressions.

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Function Documentation

Rboolean Rf_isExpression ( SEXP  s )

inline

Parameters:

s	Pointer to a CXXR::RObject.

Returns:

TRUE iff the CXXR::RObject pointed to by s is an expression.

SEXP SET_XVECTOR_ELT	(	SEXP	x,
		int	i,
		SEXP	v
	)

Set element of CXXR::ExpressionVector.

Parameters:

x	Pointer to a CXXR::ExpressionVector .
i	Index of the required element. There is no bounds checking.
v	Pointer, possibly null, to CXXR::RObject representing the new value.

Returns:

The new value v.

SEXP XVECTOR_ELT ( SEXP  x, int  i  )

inline

Examine element of a CXXR::ExpressionVector.

Parameters:

x	Non-null pointer to a CXXR::ExpressionVector .
i	Index of the required element. There is no bounds checking.

Returns:

Pointer to extracted i 'th element.