On Mon, 31 Jul 2006, Hans van der Meer wrote:
> The ConTeXt manual tells me on page 237:
>
> You can define your own buffer with:
> \definebuffer[...]
> ... name
> After this command /getbuffer and \typebuffer are available where
> buffer is the name of the buffer.
>
> I do:
> \definebuffer[left]
> \startbuffer[left]
> left\crlf
> \stopbuffer
> \typeleft
> and it gives me the error:
> ! Undefined control sequence.
> \typeleft ->\dodotypebuffer
> [left][def-3]
> l.92 \typeleft
>
> then I try:
> \typebuffer[left]
>
> this gives a typeset message [file examdoc-def-2.tmp does not exist]
> (file examdoc.tex being the containing tex file)
>
> when I try
> \getbuffer[left] or \getleft
> nothing at all seems to happen?
>
> Why doesn't it work according to the manual?
> Or do I misunderstand the manual completely?
If you just want to "tag" buffers, you do not need to define new ones.
You can simply do
\startbuffer[test]
Hello world
\stopbuffer
\typebuffer[test]
\getbuffer[test]
Defining new buffers is useful if you do not want to call buffers by
some other name. This does not allow you to "tag" the buffers. There
is also a bug in core-buf.tex due to which \type<buffer> did not work.
\unprotect
\def\dodefinebuffer[#1][#2]%
{\iffirstargument % else problems
\doglobal\increment\nofdefinedbuffers
\letvalue{\??bu#1\c!number}\nofdefinedbuffers
\letvalue{\??bu#1\c!paragraph}\v!no
\setevalue{\e!start#1}%
{\noexpand\dostartbuffer[#1][def-\nofdefinedbuffers][\e!start#1][\e!stop#1]}%
\setevalue{\e!get#1}%
{\noexpand\dodoprocessTEXbuffer[#1][def-\nofdefinedbuffers]}%
\setevalue{\e!type#1}%
{\noexpand\dotypebuffer[#1][def-\nofdefinedbuffers]}%
% was {\noexpand\dodotypebuffer[#1][def-\nofdefinedbuffers]}%
\getparameters[\??bu#1][#2]%
\fi}
\protect
\definebuffer[Example]
\startExample
Hello again
\stopExample
\typeExample %The above fix is needed for this.
\getExample
Aditya
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