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userdiff: extend Scheme support to cover other Lisp dialects #2000

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userdiff: extend Scheme support to cover other Lisp dialects #2000

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da99bb0
diff: "lisp" userdiff_driver
slburson Nov 14, 2025
86315aa
merge with Scheme regexp; fix bugs
slburson Nov 27, 2025
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17 changes: 12 additions & 5 deletions userdiff.c
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Original file line number Diff line number Diff line change
Expand Up @@ -344,14 +344,21 @@ PATTERNS("rust",
"|[0-9][0-9_a-fA-Fiosuxz]*(\\.([0-9]*[eE][+-]?)?[0-9_fF]*)?"
"|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
PATTERNS("scheme",
"^[\t ]*(\\(((define|def(struct|syntax|class|method|rules|record|proto|alias)?)[-*/ \t]|(library|module|struct|class)[*+ \t]).*)$",
/* A possibly indented left paren followed by a Scheme keyword. */
"^[\t ]*(\\(((define|def(struct|syntax|class|method|rules|record|proto|alias)?)[-*/ \t]|(library|module|struct|class)[*+ \t]).*)$\n"
/*
* R7RS valid identifiers include any sequence enclosed
* within vertical lines having no backslashes
* For other Lisp dialects: either an unindented left paren, or a
* slightly indented line starting with "(def".
*/
"\\|([^\\\\]*)\\|"
"^((\\(| {1,2}\\([Dd][Ee][Ff]).*)$",
/*
* The union of R7RS and Common Lisp symbol syntax: allows arbitrary
* strings between vertical bars, including escaped backslashes and
* vertical bars.
*/
"\\|([^\\\\]|\\\\\\\\|\\\\\\|)*\\|"
/* All other words should be delimited by spaces or parentheses */
"|([^][)(}{[ \t])+"),
"|([^][)(}{ \t])+"),
PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
"\\\\[a-zA-Z@]+|\\\\.|([a-zA-Z0-9]|[^\x01-\x7f])+"),
{ .name = "default", .binary = -1 },
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