Re: Using ^ (match start of line) and \% (match column) together

On 2016-06-07 20:47:07 +0000, Nikolay Aleksandrovich Pavlov said:

> 2016-06-07 22:45 GMT+03:00 Nicola <nvitacolonna@gmail.com>:
>> The following patterns both match up to column 17 included:
>>
>> /.*\%17v
>> /.*\%17v.
>>
>> If ^ is added, the two are no more equivalent:
>>
>> /^.*\%17v <-- matches up to column 16
>> /^.*\%17v. <-- matches up to column 17
>
> You are treating this wrong. First original patterns matches up to
> column 16 (inclusive) *and* has a zero-width match after column 16
> which (as any other zero-width match) makes &hlsearch highlight column
> 17. Second original pattern matches up to column 17 (inclusive).
>
> I.e. first original pattern has *two* matches (one of which uses the
> fact that `.*` may match zero characters), second has *one*. Putting
> `^` at the start rejects one of the matches.

Crystal clear now. I was fooled by the help, which states:

To match the text up to column 17:
/.*\%17v
Column 17 is included, because that's where the "\%17v" matches,
even though this is a /zero-width match. Adding a dot to match the
next character has the same result:
/.*\%17v.

The last sentence led me to think that the two are equivalent.

Thanks!
Nicola


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