Re: [GSoC] Microproject: Add more builtin patterns for userdiff
On Fri, Mar 15 2019, Kapil Jain wrote:
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> Hi,
>
> for the microproject: creating diff function support for different languages.
> i wrote one for shell script, have tested it outside of git and it works fine.
>
> query regarding accommodating the pattern in:
> 1) userdiff.c, it uses - #define PATTERNS(name, pattern, word_regex),
> for defining patterns to locate functions.
> what is the use of pattern and word_regex parameters ? i am guessing
> that pattern parameter is the actual pattern to spot functions in a
> file,
Yes, except "functions". More like "logical start of stuff". E.g. "package" statements for Perl etc.
So whatever makes the most sense to put in the "@" context line for diff to give the user an idea of what "function" this is changing, in the loosest possible sense of "function".
> and word_regex is used to get function name. is that correct ?
> please let me know.
No, it's whatever counts as a "token" in the language for the purpose of "diff --word-diff". So it needs to match e.g. operators as one unit.
