Re: new egg: matchertext

Hello,

On Sat Jun 27, 2026 at 8:36 AM BST, John Cowan wrote:
> Note that this design does not allow arbitrary syntaxes for either the
> embedding or the embedded languages: only languages with paired
> parentheses, brackets, and braces can participate. Thus for example shell
> syntax, which uses unpaired ")" in case statements, will not work.

Certainly, but while code is not always matchertext, a lot of it is.

> As an alternative, C++11 raw string syntax has no such limitations: it us=
es
> customized delimiters that can enclose completely arbitrary strings subje=
ct
> to the rule that the delimiter can't appear in the delimited string, so i=
t
> is always possible to choose a delimiter given a string to be delimited.
>
> The C++ variant of this syntax is R(X)str(X), where str is the string to =
be
> delimited and X is any sequence of characters (excluding right paren) suc=
h
> that (X) does not appear in str. A Schemish variant of this is #"X"str"X"=
,
> defined in SRFI 267, where X excludes quote. Note that X can be empty if =
""
> does not appear in str.

To add another alternative, check out my other egg `raw`, which supports a
custom prefix character, substitution of expressions, smart indentation, am=
ong
other things. Its syntax is based on that of SRFI-109.

For more general string formatting, I am currently working on implementing
SRFI-165 and SRFI-166 in CHICKEN.

Cheers,
Hern=C3=A1n