(R-ints.info)R Internal Structures

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1 R Internal Structures
***********************

This chapter is the beginnings of documentation about R internal
structures.  It is written for the core team and others studying the
code in the 'src/main' directory.

   It is a work-in-progress and should be checked against the current
version of the source code.  Versions for R 2.x.y contain historical
comments about when features were introduced: this version is for the
3.x.y series.

SEXPs

Environments and variable lookup

Attributes

Contexts

Argument evaluation

Autoprinting

The write barrier

Serialization Formats

Encodings for CHARSXPs

The CHARSXP cache

Warnings and errors

S4 objects

Memory allocators

Internal use of global and base environments

Modules

Visibility

Lazy loading