On 31 August 2017 at 11:06, Gregrs <gre...@fastmail.co.uk> wrote: > Hi Gianmaria, > > On Wed, Aug 30, 2017 at 09:58:52PM +0100, Gregrs wrote: > > The below expression (minus the quotation marks) seems to work for notes >> and chords without any articulation etc. attached. I've used Vim regex >> syntax so \@<= is a positive lookbehind to match the space before it and >> \@= is a positive lookahead to match the space before it. It also selects >> the whitespace in between and after notes/chords. >> >> ' \@<=<*\([a-g][',]*[1-8]* *\)\+>* \@= *' >> > > I constructed the above expression in a hurry and forgot about > accidentals.
:) > I've put together a few more expressions below that might be useful (using > the Italian accidentals language) in a couple of regex flavours: Vim and > Python (which I think is used by Frescobaldi, for example). They still > don't match any attached articulation etc. > For the articulation is not a problem, at the moment I don't need it. I'm writing some c# classes to help me generating lilypond source files. The music I want to generate are technical exercises for accordion. I asked for the regex because I thought that maybe something already existed. Thanks a lot for you help! > Without getting more complex, some of the expressions will match things in > a LilyPond source file that aren't notes, such as words in a markup that > look like they could be notes. Also if you're trying to verify that matches > are in fact valid notes, you might want to be a bit more strict than I have > been e.g. with possible durations. > Not a problem. Your regex would be an excellent starting point. I rarely use regex so I'm not good with it. If I will improve your regex, I will send them here so others can take advantage. > Hope they're useful though. You might find this site useful for trying > things out: http://regex101.com Yes, it's the site I use :) Notes > Vim: [a-g]\([ie]s\)\{0,2}[',]*[1-8]* > Python: [a-g]([ie]s){0,2}[',]*[1-8]* > > Notes bordered by space or beginning/end of line > Vim: \( \|^\)\@<=[a-g]\([ie]s\)\{0,2}[',]*[1-8]*\( \|$\)\@= > Python: ((?<= )|(?<=^))[a-g]([ie]s){0,2}[',]*[1-8]*(?=( |$)) > > Chords > Vim: <\([a-g]\([ie]s\)\{0,2}[',]* *\)\+>[1-8]* > Python: <([a-g]([ie]s){0,2}[',]* *)+>[1-8]* > > Chords bordered by space or beginning/end of line > Vim: \( \|^\)\@<=<\([a-g]\([ie]s\)\{0,2}[',]* *\)\+>[1-8]*\( \|$\)\@= > Python: ((?<= )|(?<=^))<([a-g]([ie]s){0,2}[',]* *)+>[1-8]*(?=( |$)) > > Notes or chords bordered by space or beginning/end of line > Vim: \( > \|^\)\@<=\([a-g]\([ie]s\)\{0,2}[',]*[1-8]*\|<\([a-g]\([ie]s\)\{0,2}[',]* > *\)\+>[1-8]*\)\( \|$\)\@= > Python: ((?<= )|(?<=^))([a-g]([ie]s){0,2}[',]*[1-8]*|<([a-g]([ie]s){0,2}[',]* > *)+>[1-8]*)(?=( |$)) > Thanks a lot Greg!!!! Ciao, g.
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