Problem with header field

[rpspringuel]

The transcription-date header field seems to be throwing errors now. The following file throws a error:syntax error using the most recent develop. Comment out the transcription-date line and the error disappears.

name: When Christ was born;
gabc-copyright:  (C) R. Padraic Springuel, This work is licensed under a Creative Commons Attribution 4.0 International License.;
office-part: Hymn;
occasion: Epiphany;
meter: 8.8.8.8;
arranger: Nicolas;
transcriber: Br. Samuel Springuel, OSB;
transcription-date: 20131231; 
mode: 2;

%%

(f3) When(f) Christ(f) was(f) born,(e) God(f) sent(h) a(g) star,(f_) (,)
A(h) sign(i) of(i) hope(i) whence(h) light(i) should(i) spring,(j.) (;)
And(j) Is(j)rael's(i) glo(j)ry(h) shine(i) for(h) all,(f_) (,)
For(f) pa(e)gan(f) and(h) for(i) pil(f)grim-(e)king.(f.) (::)

[henryso]

Using develop, I don't get an error when compiling that file to tex, nor when typesetting it with my boilerplate "main" .tex file. Is it possible your "main" .tex file is taking that field and doing something with it?

[rpspringuel]

Did you uncomment the transcription-date line? It only throws the syntax error when that line is uncommented. Indeed, I'll edit my starting post to reflect that.

I'm using Gregorio 4.2.0-develop-7029d95e-4061 (which is latest develop) and the error is a rather uninformative error:syntax error.

[henryso]

Yes, I did uncomment that line. However, I hand typed (rather than copied) your sample. However, in copying your example, I have realized what the error is. There is a space after the semicolon on that line. I'll see what I can do about ignoring that space.

[henryso]

Because we support headers with embedded semicolons, such as:

book: Graduale Romanum, 1908, p. 249; Graduale Triplex, 1979, p. 253; Sg. 376 p. 296;

... I'm having trouble coming up with an appropriate expression to ignore the space, but I'll keep trying.

[rpspringuel]

Wouldn't the regex for the end of the line be be something like: ;\s*(%.*)?$

[rpspringuel]

Or perhaps we should modify the spec to say that if the header contains a semicolon, then it should be ended with a double one?

[henryso]

The problem is that I need to figure out a regular expression (actually a flex expression) that matches the stuff before the end-of-header sequence of characters.

[rpspringuel]

Well, I think the following regex will match any valid header line: ^[^:]+: .*;[ \t]*(%.*)?$

I don't know much about flex expressions (just what a quick google search can tell me) but,
I think you could use the trailing context possibility to turn the above into something like this: ^[^:]+: .*/;[ \t]*(%.*)?$

In this case, the returned match will just be the header name and content. Everything after / (from the end of content ; to the end of the line (including the ;)) would not be returned as part of the match, but is used to determine if the match has been made. That is, if I understand what I've read correctly.

[henryso]

The parser matches with pieces of the header, not the entire header (which would then need to be parsed ... again ... for its parts). In any case, I think I've come up with a solution.