[PATCH] Syntax: Added syntax for Python decorators.

From c3253c9cca3bbbcb3f9cbeea7b61980665439e06 Mon Sep 17 00:00:00 2001
From: Matteo Raso <[email protected]>
Date: Wed, 18 Jan 2023 01:25:04 -0500
Subject: [PATCH] Signed-off-by: Matteo Raso <[email protected]>

Added syntax for Python decorators

Decorators are an important part of the Python language, so GNU nano should
give them a colour instead of ignoring them. For the syntax, I start the
colouring at "@" and end it at either a blank space or a newline. The
reason I stop the syntax after a blank space is because "@" doubles as an
operator in Numpy and downstream packages, so we have to take care to not
mess up the entire line if "@" is used that way. One slight problem is that
the syntax colouring will also apply to any arguments passed to the decorator
if a space isn't placed between the opening bracket and the decorator.

e.g. "@dec(a)" will be one colour, which might be slightly unaesthetic.

This isn't much of a problem though, since it can be easily fixed by going

"@dec (a)"
---
 syntax/python.nanorc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/syntax/python.nanorc b/syntax/python.nanorc
index e8ba17e2..be047fcb 100644
--- a/syntax/python.nanorc
+++ b/syntax/python.nanorc
@@ -33,6 +33,9 @@ color brightred "(^|[[:blank:]])#.*"
 color brightgreen start="'''([^'),]|$)" end="(^|[^(\])'''"
 color brightgreen start=""""([^"),]|$)" end="(^|[^(\])""""
 
+#Decorators.
+color sky start="@" end="^|\ "
+
 # Backslash escapes.
 color lime "\\($|[\'"abfnrtv]|[0-3]?[0-7]?[0-7]|x[[:xdigit:]]{2})"
 color lime "\\(N\{[[:alpha:]]+\}|u[[:xdigit:]]{4}|U[[:xdigit:]]{8})"
-- 
2.38.1