I dont think you can use regex to match a whole expression like that but
you can use it to pick off bits and pieces. Just make a regex that matches
all of the possible commands + options and run that through, advancing the
string position each time. Eg
"o4l8cdefg" => string code;
string matches[0];
"((o)([0-9]+)|([abcdefg])(1|2|4|8|16)?|(l)([0-9]+))" => string pattern;
for(0 => int i; i < code.length(); )
{
if(RegEx.match(pattern, code.substring(i), matches))
{
if(matches[2] == "o")
<<< "octave:", matches[3] >>>;
else if(matches[4] == "a")
<<< "a" >>>;
// etc.
matches[0].length() +=> i;
}
else
{
<<< "invalid code" >>>;
break;
}
}
I dont know anything about MML so I dont know what the final regex would
look like.
Another option is to just go through the string iteratively and look at
each character one at a time. If whitespace is undesirable StringTokenizer
might be hurting more than helping here.
for(0 => int i; i < code.length(); )
{
int c = code.charAt(i);
if(c == 'o')
{
// look for number
}
else if(c == 'a' || c == 'b' || ... )
{
// see if number follows
}
}
spencer
On Tue, Sep 6, 2016 at 6:32 PM, Colton Hill <colton-hill2...@hotmail.com>
wrote:
> I also want to make sure I have a customizable play function that will
> handle my playing. Here's the code I've been using for my current mml
> parser in chuck, actually does take a code string and a play function,
> and operates well. Only issue is including doesn't work... So have a test.
>
>
> On 9/6/2016 3:33 AM, Hans Åberg wrote:
> >> On 5 Sep 2016, at 23:16, Colton Hill <colton-hill2...@hotmail.com>
> wrote:
> >>
> >> I know regular expressions syntax, but I really don't know how I would
> >> manage to make an mml parser that actually works. Turn o4l8cdefg into
> >> octave 4, length 8, and c d e f g notes with an 8th note length since no
> >> length is specified. Then there's c4., which is c4^c8... Just bla…
> > There are free MML parsers in C out there. Linking to ChucK, which is
> written in C++, might be a way.
> >
> >
> > _______________________________________________
> > chuck-users mailing list
> > chuck-users@lists.cs.princeton.edu
> > https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>
>
> _______________________________________________
> chuck-users mailing list
> chuck-users@lists.cs.princeton.edu
> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>
>
--
Spencer Salazar
Doctoral Candidate
Center for Computer Research in Music and Acoustics
Stanford University
spen...@ccrma.stanford.edu
+1 831.277.4654
https://ccrma.stanford.edu/~spencer/
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