Hej :)
On 2019-01-06 22:36, Chris Marusich wrote:
swedebu...@riseup.net writes:
I'm trying very hard to learn the guile match-syntax.
When I first learned about "match", I found the Guile documentation to
be insufficient. It is good as a reference, though.
I recommend looking beyond the Guile reference manual for a tutorial.
Check the Guile source for "match" related things.
Good idea.
Also, look at
introductions to "match" from other Schemes, such as Racket. I think
you will understand it better by doing that.
Thanks I already did that actually. The Racket guide was way better but
not enough. Now I finally crossed the threshold to partially
understanding it.
e.g.
(match '(1 2 "y" "x")
(1
'one)
(number
'number))
Will match any number for the first clause and any string for the
second. It ONLY checks if it is a number.
To actually match something e.g. the "x" literally we need to nest the
match like this:
(match '(1 2 y x)
(string
(match string
("x"
'x!)))
(number
'number))
Positional arguments work like this:
(match '(1 2 y x)
;match the third item
(_ _ string
;check if it is the literal "x"
(match string
("x"
'x!)))
(number
'number))
Correct?
--
Cheers Swedebugia
