(r5rs.info.gz) Identifiers
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(r5rs.info.gz) Lexical conventions
(r5rs.info.gz) Lexical conventions
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2.1 Identifiers
===============
Most identifiers allowed by other programming languages are also
acceptable to Scheme. The precise rules for forming identifiers vary
among implementations of Scheme, but in all implementations a sequence
of letters, digits, and "extended alphabetic characters" that begins
with a character that cannot begin a number is an identifier. In
addition, `+', `-', and `...' are identifiers. Here are some examples
of identifiers:
lambda q
list->vector soup
+ V17a
<=? a34kTMNs
the-word-recursion-has-many-meanings
Extended alphabetic characters may be used within identifiers as if
they were letters. The following are extended alphabetic characters:
! $ % & * + - . / : < = > ? @ ^ _ ~
See section Lexical structure for a formal syntax of
identifiers.
Identifiers have two uses within Scheme programs:
* Any identifier may be used as a variable or as a syntactic keyword
(see sections Variables; syntactic keywords; and regions
and Macros).
* When an identifier appears as a literal or within a literal (see
section Literal expressions), it is being used to denote a
_symbol_ (see section Symbols).
Info Catalog
(r5rs.info.gz) Lexical conventions
(r5rs.info.gz) Lexical conventions
(r5rs.info.gz) Whitespace and comments
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