Le samedi 24 septembre 2016 18:46:07 UTC+2, William G Hatch a écrit :
> Udelim is a library for adding extra parens and string delimiters to
> your language.
I can't tell how ecstatic I am about this :) . I have been wanting to add new
parenthesis shapes for a while, but never found the time to look seriously into
it, so thank you a lot for writing this! I was thinking about using the white
brackets ⟦⟧, braces ⦃⦄ and parentheses ⦅⦆ are commonly used for describing
semantics, for example.
I also like the idea of nestable string delimiters, although I rarely have use
for it.
One note about the docs: when you write:
(open-input-string
"«this is a string with nested «string delimiters.» No \n escape
interpreting.»")
the "\n" is already escaped by the "…" fed into open-input-string I think, so
what udelim parses in that example is a raw newline, not the \ character
followed by the n character.
Scribble supports "element transformers" which allow to change how an
identifier is printed. Unfortunately, when the identifier appears in the first
position of a form (like the #% wrappers), only the identifier itself can get
styled, not the whole form. I added a few days ago a quick hack to my unstable
scribble-enhanced library to add catch-alls which can re-style any identifier
matching a given pattern. The hack [1] should also work for whole forms
(untested, though), so that in scribble or scribble/lp2, @racketblock[(a ⟦b⟧
c)] would be properly typeset.
Georges
[1] The hack in scribble-enhanced
https://github.com/jsmaniac/scribble-enhanced/blob/master/racket.rkt#L1012
[2] Example using the hack to nicely typeset identifiers with numeric
superscripts like String³, which means "three strings in a row" for the xlist
type expander
https://github.com/jsmaniac/xlist/blob/master/scribble-enhanced.rkt
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