SEXPTYPE.h File Reference

($Id: SEXPTYPE.h 1348 2013-02-25 17:49:03Z arr $)

The SEXPTYPE enumeration. More...

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Enumerations
enum	SEXPTYPE {   NILSXP = 0, SYMSXP = 1, LISTSXP = 2, CLOSXP = 3,   ENVSXP = 4, PROMSXP = 5, LANGSXP = 6, SPECIALSXP = 7,   BUILTINSXP = 8, CHARSXP = 9, LGLSXP = 10, INTSXP = 13,   REALSXP = 14, CPLXSXP = 15, STRSXP = 16, DOTSXP = 17,   ANYSXP = 18, VECSXP = 19, EXPRSXP = 20, BCODESXP = 21,   EXTPTRSXP = 22, WEAKREFSXP = 23, RAWSXP = 24, S4SXP = 25,   CXXSXP = 43, BAILSXP = 44, FUNSXP = 99 }
	CR's object type identification. More...

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Detailed Description

The SEXPTYPE enumeration.

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Enumeration Type Documentation

enum SEXPTYPE

CR's object type identification.

This enumeration is used within CR to identify different types of R object. In CXXR the same purpose could be (and sometimes is) achieved by C++ run-time type information (RTTI), virtual function despatch etc. However, a SEXPTYPE field is retained within each CXXR::RObject for backwards compatibility, and indeed efficiency.

Enumerator:

NILSXP	NULL. In CXXR no CXXR::RObject has this type, but for backward compatibility TYPEOF will return NILSXP if passed a null pointer.
SYMSXP	symbols, implemented in class CXXR::Symbol.
LISTSXP	lists of dotted pairs, implemented in class CXXR::PairList.
CLOSXP	closures, implemented in class CXXR::Closure.
ENVSXP	environments, implemented in class CXXR::Environment.
PROMSXP	promises: [un]evaluated closure arguments, implemented in class CXXR::Promise.
LANGSXP	language constructs (special lists), implemented in class CXXR::Expression.
SPECIALSXP	special forms, implemented in class CXXR::BuiltInFunction.
BUILTINSXP	builtin non-special forms, also implemented in class CXXR::BuiltInFunction.
CHARSXP	"scalar" string type (internal only), implemented in class CXXR::String.
LGLSXP	logical vectors, implemented in class CXXR::LogicalVector.
INTSXP	integer vectors, implemented in class CXXR::IntVector.
REALSXP	real variables, implemented in class CXXR::RealVector.
CPLXSXP	complex variables, implemented in class CXXR::ComplexVector.
STRSXP	string vectors, implemented in class CXXR::StringVector.
DOTSXP	dot-dot-dot objects, implemented in class CXXR::DottedArgs.
ANYSXP	Used to make "any" args work. No CXXR::RObject has this type.
VECSXP	generic vectors, implemented in class CXXR::ListVector.
EXPRSXP	expression vectors, implemented in class CXXR::ExpressionVector.
BCODESXP	byte code, implemented in class CXXR::ByteCode.
EXTPTRSXP	external pointers, implemented in class CXXR::ExternalPointer.
WEAKREFSXP	weak references, implemented in class CXXR::WeakRef.
RAWSXP	raw bytes, implemented in class CXXR::RawVector.
S4SXP	S4 object not inheriting from another SEXPTYPE, implemented in class CXXR::S4Object.
CXXSXP	object types specific to CXXR.
BAILSXP	Object used to implement indirect flow of control in R without using a C++ exception.
FUNSXP	Closure or Builtin. No CXXR::RObject has this type.