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Re: [Nano-devel] [PATCH] syntax: c: change the highlighting of preproces

From: Benno Schulenberg
Subject: Re: [Nano-devel] [PATCH] syntax: c: change the highlighting of preprocessor directives
Date: Sun, 17 Dec 2017 12:32:33 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0

Op 13-12-17 om 06:48 schreef Liu Hao:
On 2017/12/10 22:38, Benno Schulenberg wrote:
+# Preprocessor directives.
+color brightcyan 

There is an issue here:

With this patch, both of the following lines are colored:

blah blah

This is not the case if a space is appended to the first line.
Apparently `\>` matches the zero-length span between the word `warning`
and the LF following it immediately, but the LF of the first line is
skipped somehow when searching for termination of the PP directive,
resulting in the LF of the second line being the eventual terminator.

The "end=" part wants a character that is not a backslash and that is
not part of what the "start=" matched.  The "start=" and "end=" parts
cannot overlap each other.  I do not know how to solve this.

(There is an additional problem: if you type a space after "#warning",
the coloring of "blah blah" is dropped.  But if you then remove the
space again, "blah blah" is not recolored.  Only when typing ^S or ^L
does the color return.  So a change in the multiline regex matching is
not always detected.  But that is a different kind of bug.)


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