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(elisp)Programming Types


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Programming Types
=================

   There are two general categories of types in Emacs Lisp: those having
to do with Lisp programming, and those having to do with editing.  The
former exist in many Lisp implementations, in one form or another.  The
latter are unique to Emacs Lisp.

Integer Type
Numbers without fractional parts.
Floating Point Type
Numbers with fractional parts and with a large range.
Character Type
The representation of letters, numbers and
control characters.
Symbol Type
A multi-use object that refers to a function,
variable, or property list, and has a unique identity.
Sequence Type
Both lists and arrays are classified as sequences.
Cons Cell Type
Cons cells, and lists (which are made from cons cells).
Array Type
Arrays include strings and vectors.
String Type
An (efficient) array of characters.
Vector Type
One-dimensional arrays.
Char-Table Type
One-dimensional sparse arrays indexed by characters.
Bool-Vector Type
One-dimensional arrays of `t' or `nil'.
Hash Table Type
Super-fast lookup tables.
Function Type
A piece of executable code you can call from elsewhere.
Macro Type
A method of expanding an expression into another
expression, more fundamental but less pretty.
Primitive Function Type
A function written in C, callable from Lisp.
Byte-Code Type
A function written in Lisp, then compiled.
Autoload Type
A type used for automatically loading seldom-used
functions.

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