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Add language/wisp, Wisp tests, and SRFI-119 documentation

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* doc/ref/srfi-modules.texi (srfi-119): add node
* module/language/wisp.scm: New file.
* module/language/wisp/spec.scm: New file.
* test-suite/tests/srfi-119.test: New file.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
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Arne Babenhauserheide 2024-03-11 06:34:52 +01:00 • committed by Ludovic Courtès
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doc/ref/srfi-modules.texi
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@ -64,6 +64,7 @@ get the relevant SRFI documents from the SRFI home page
* SRFI-98:: Accessing environment variables.
* SRFI-105:: Curly-infix expressions.
* SRFI-111:: Boxes.
* SRFI-119:: Wisp: simpler indentation-sensitive Scheme.
* SRFI-171:: Transducers
@end menu
@ -5662,6 +5663,35 @@ Return the current contents of @var{box}.
Set the contents of @var{box} to @var{value}.
@end deffn
@node SRFI-119
@subsection SRFI-119 Wisp: simpler indentation-sensitive Scheme.
@cindex SRFI-119
@cindex wisp
The languages shipped in Guile include SRFI-119, also referred to as
@dfn{Wisp} (for ``Whitespace to Lisp''), an encoding of Scheme that
allows replacing parentheses with equivalent indentation and inline
colons. See
@uref{http://srfi.schemers.org/srfi-119/srfi-119.html, the specification
of SRFI-119}. Some examples:
@example
display "Hello World!" @result{} (display "Hello World!")
@end example
@example
define : factorial n @result{} (define (factorial n)
if : zero? n @result{} (if (zero? n)
. 1 @result{} 1
* n : factorial @{n - 1@} @result{} (* n (factorial @{n - 1@}))))
@end example
To execute a file with Wisp code, select the language and filename
extension @code{.w} vie @code{guile --language=wisp -x .w}.
In files using Wisp, @xref{SRFI-105} (Curly Infix) is always activated.
@node SRFI-171
@subsection Transducers
@cindex SRFI-171
@ -5705,6 +5735,7 @@ left-to-right, due to how transducers are initiated.
* SRFI-171 Helpers:: Utilities for writing your own transducers
@end menu
@node SRFI-171 General Discussion
@subsubsection SRFI-171 General Discussion
@cindex transducers discussion