A number of different special forms are indicated by an
initial hash (number) symbols (#).
Here is a table summarizing them.
Case is ignored for the character followed the #.
Thus #x and #X are the same.
#:keyword
Guile-style keyword syntax (deprecated).
#\Character literals.
#!#`datum
Equivalent to (quasisyntax .
Convenience syntax for syntax-case macros.
datum)
#'datum
Equivalent to (syntax .
Convenience syntax for syntax-case macros.
datum)
#(A vector.
#|Start of nested-comment.
#/regex/
See Regular expressions.
#<See XML literals.
#;datum
A datum comment - the datum is ignored.
(An interlexeme-space may appear before the datum.)
#,(name datum ...)
Special named constructors.
#number=datum
A reference definition, allowing cyclic and shared structure.
Equivalent to the datum, but also defines an association between
the integer number and that datum, which can be
used by a subsequent # form.
number#
#number#
A back-reference, allowing cyclic and shared structure.
#bA binary (base-2) number.
#dA decimal (base-10) number.
#eA prefix to treat the following number as exact.
#fThe standard boolean false object.
#fn(number ...)
A uniform vector of floating-point numbers.
The parameter n is a precision, which can be 32 or 64.
See Uniform vectors.
#iA prefix to treat the following number as inexact.
#oAn octal (base-8) number.
#baser
A number in the specified base (radix).
#sn(number ...)
A uniform vector of signed integers.
The parameter n is a precision, which can be 8, 16, 32, or 64.
See Uniform vectors.
#tThe standard boolean true object.
#un(number ...)
A uniform vector of unsigned integers.
The parameter n is a precision, which can be 8, 16, 32, or 64.
See Uniform vectors.
#xA hexadecimal (base-16) number.
The follow named constructor forms are supported:
#,(path path)
#,(filepath path)
#,(URI path)
#,(symbol local-name [uri [prefix]])
#,(symbol local-name namespace)
#,(namespace uri [prefix])
#,(duration duration)