Bug in dowithpargument and paragraph ending in a macro

Bug in dowithpargument and paragraph ending in a macro

[Aditya Mahajan]

Hi,

Consider this:

\starttext

\section This is ok

I like the loose format

\section why \unknown

This does not work

\stoptext

which gives

./test.tex:8: Paragraph ended before \nextpar was complete.
<to be read again>
                    \par
l.8

I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.

This seems to be a bug in dowithpargument. As a temporary workaround, 
I can just enclose the section in braces, but it will be nice if 
\dowithpargument behaves correctly in this situation.

Aditya
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Re: Bug in dowithpargument and paragraph ending in a macro

[Wolfgang Schuster]

2007/7/10, Aditya Mahajan <adityam@umich.edu>:
> Hi,
>
> Consider this:
>
> \starttext
>
> \section This is ok
>
> I like the loose format
>
> \section why \unknown

\section why \unknown\par

> This does not work
>
> \stoptext
>
> which gives
>
> ./test.tex:8: Paragraph ended before \nextpar was complete.
> <to be read again>
>                     \par
> l.8
>
> I suspect you've forgotten a `}', causing me to apply this
> control sequence to too much text. How can we recover?
> My plan is to forget the whole thing and hope for the best.
>
> This seems to be a bug in dowithpargument. As a temporary workaround,
> I can just enclose the section in braces, but it will be nice if
> \dowithpargument behaves correctly in this situation.
>
> Aditya

Hi Aditya,

the macro eats the endline char.

This did also happen in normal text:

\starttext

look, there is no space after the \TeX
sign, do you understand it.

\stoptext

Wolfgang
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___________________________________________________________________________________

Re: Bug in dowithpargument and paragraph ending in a macro

[Aditya Mahajan]

Hi Wolfgang,

Quoting Wolfgang Schuster <schuster.wolfgang@googlemail.com>:


> Hi Aditya,
>
> the macro eats the endline char.

That would mean that tex will parse
=============
\section why \unknown

test

=============

as

===============
\section why \unknown test

================

but it does not. What I dislike is the fact that TeX gives an error message.

Aditya
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Re: Bug in dowithpargument and paragraph ending in a macro

[Wolfgang Schuster]

2007/7/10, Aditya Mahajan <adityam@umich.edu>:
> Hi Wolfgang,
>
> Quoting Wolfgang Schuster <schuster.wolfgang@googlemail.com>:
>
>
> > Hi Aditya,
> >
> > the macro eats the endline char.
>
> That would mean that tex will parse
> =============
> \section why \unknown
>
> test
>
> =============
>
> as
>
> ===============
> \section why \unknown test
>
> ================
>
> but it does not. What I dislike is the fact that TeX gives an error message.
>
> Aditya

Hi Aditya,

the problem lies in the definition of \dowithpargument. The current
defintion is:

\def\dowithpargument#1%
  {\def\nextpar##1 \par{#1{##1}}%
   \def\nextarg##1{#1{##1}}%
   \doifnextcharelse\bgroup\nextarg{\doifnextcharelse\par{#1{}}\nextpar}}

The problem is the space after ##1 in the \nexpar defintion, it should be:

\def\dowithpargument#1%
  {\def\nextpar##1\par{#1{##1}}%
   \def\nextarg##1{#1{##1}}%
   \doifnextcharelse\bgroup\nextarg{\doifnextcharelse\par{#1{}}\nextpar}}

and everything works fine.

Wolfgang
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Re: Bug in dowithpargument and paragraph ending in a macro

[Aditya Mahajan]

On Wed, 11 Jul 2007, Wolfgang Schuster wrote:

> 2007/7/10, Aditya Mahajan <adityam@umich.edu>:
>> Hi Wolfgang,
>>
>> Quoting Wolfgang Schuster <schuster.wolfgang@googlemail.com>:
>>
>>
>>> Hi Aditya,
>>>
>>> the macro eats the endline char.
>>
>> That would mean that tex will parse
>> =============
>> \section why \unknown
>>
>> test
>>
>> =============
>>
>> as
>>
>> ===============
>> \section why \unknown test
>>
>> ================
>>
>> but it does not. What I dislike is the fact that TeX gives an error message.
>>
>> Aditya
>
> Hi Aditya,
>
> the problem lies in the definition of \dowithpargument. The current
> defintion is:
>
> \def\dowithpargument#1%
>  {\def\nextpar##1 \par{#1{##1}}%
>   \def\nextarg##1{#1{##1}}%
>   \doifnextcharelse\bgroup\nextarg{\doifnextcharelse\par{#1{}}\nextpar}}
>
> The problem is the space after ##1 in the \nexpar defintion, it should be:
>
> \def\dowithpargument#1%
>  {\def\nextpar##1\par{#1{##1}}%
>   \def\nextarg##1{#1{##1}}%
>   \doifnextcharelse\bgroup\nextarg{\doifnextcharelse\par{#1{}}\nextpar}}
>
> and everything works fine.

Ah, thanks.

Aditya
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