Other notations
For a description of the notations used for numbers, see
section 6.2.
. + -
These are used in numbers, and can also occur anywhere in an identifier.
A delimited plus or minus sign by itself
is also an identifier.
A delimited period (not occurring within a number or identifier) is used
in the notation for pairs (section 6.4), and to indicate a
rest-parameter in a formal parameter list (section 4.1.4).
Note that a sequence of two or more periods is an identifier.
( )
Parentheses are used for grouping and to notate lists
(section 6.4).
'
The apostrophe (single quote) character is used to indicate literal data (section 4.1.2).
, ,@
The character comma and the sequence comma at-sign are used in conjunction
with quasiquotation (section 4.2.8).
"
The quotation mark character is used to delimit strings (section 6.7).
\
Backslash is used in the syntax for character constants
(section 6.6) and as an escape character within string
constants (section 6.7) and identifiers.
[ ] { }
Left and right square and curly brackets (braces)
are reserved for possible future extensions to the language.
#
The number sign is used for a variety of purposes depending on
the character that immediately follows it:
#t #f
These are the boolean constants (section 6.3),
along with the alternatives #true and #false.
#\
This introduces a character constant (section 6.6).
#(
This introduces a vector constant (section 6.8). Vector constants
are terminated by ) .
#u8(
This introduces a bytevector constant (section 6.9). Bytevector constants
are terminated by ) .
#e #i #b #o #d #x
These are used in the notation for numbers (section 6.2.5).
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