\type{...} as macro argument

\type{...} as macro argument

[Sylvain Hubert]

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Dear List,

I would like to ask how to define a command, \same, such that

    \same{\type{a   b c}}

produces the same result as its argument does

    \type{a   b c}

The naive way doesn't work because it makes all the spaces collapse:

    \define[1]\same{#1}

I would also like to ask whether this could be achieved using the lua
interface:

    \startluacode
    interfaces.definecommand {
       name="same",
       -- catcode/mode/arguments = ???
    }

Thanks in advance.

Best,
Sylvain

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Re: \type{...} as macro argument

[Wolfgang Schuster]

Sylvain Hubert schrieb am 08.11.2020 um 14:47:
> Dear List,
> 
> I would like to ask how to define a command, \same, such that
> 
>      \same{\type{a   b c}}
> 
> produces the same result as its argument does
> 
>      \type{a   b c}
> 
> The naive way doesn't work because it makes all the spaces collapse:
> 
>      \define[1]\same{#1}


\definetype [typeTEX] [option=tex]

\starttext

\type{\startsection[title=\tex{type}]}

\typeTEX{\startsection[title=\tex{typeTEX}]}

\stoptext

Wolfgang
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Re: \type{...} as macro argument

[Sylvain Hubert]

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Hi Wolfgang,

I'm sorry that the question was not clear enough. Let me ask in this way:
how to define a \dorecurse, such that \dorecurse{10}{\type{a    b c}} does
not squash the spaces?

Sylvain

On Sun, 8 Nov 2020 at 15:03, Wolfgang Schuster <
wolfgang.schuster.lists@gmail.com> wrote:

> Sylvain Hubert schrieb am 08.11.2020 um 14:47:
> > Dear List,
> >
> > I would like to ask how to define a command, \same, such that
> >
> >      \same{\type{a   b c}}
> >
> > produces the same result as its argument does
> >
> >      \type{a   b c}
> >
> > The naive way doesn't work because it makes all the spaces collapse:
> >
> >      \define[1]\same{#1}
>
>
> \definetype [typeTEX] [option=tex]
>
> \starttext
>
> \type{\startsection[title=\tex{type}]}
>
> \typeTEX{\startsection[title=\tex{typeTEX}]}
>
> \stoptext
>
> Wolfgang
>

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Re: \type{...} as macro argument

[Wolfgang Schuster]

Sylvain Hubert schrieb am 08.11.2020 um 17:56:
> Hi Wolfgang,
> 
> I'm sorry that the question was not clear enough. Let me ask in this way:
> how to define a \dorecurse, such that \dorecurse{10}{\type{a    b c}} 
> does not squash the spaces?

Verbatim in arguments of other commands is tricky because in case with 
\dorecurse the loop reads the content before it is passed to type, as a 
result of this process all spaces are collapsed.

One way to work around this is to use a buffer for the content of the loop.

\startbuffer[type]
\type{a    b c}
\stopbuffer

\starttext
\dorecurse{10}{\inlinebuffer[type]\par}
\stoptext

Wolfgang
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Re: \type{...} as macro argument

[Sylvain Hubert]

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On Sun, 8 Nov 2020 at 18:27, Wolfgang Schuster <
wolfgang.schuster.lists@gmail.com> wrote:

> Sylvain Hubert schrieb am 08.11.2020 um 17:56:
> > Hi Wolfgang,
> >
> > I'm sorry that the question was not clear enough. Let me ask in this way:
> > how to define a \dorecurse, such that \dorecurse{10}{\type{a    b c}}
> > does not squash the spaces?
>
> Verbatim in arguments of other commands is tricky because in case with
> \dorecurse the loop reads the content before it is passed to type, as a
> result of this process all spaces are collapsed.
>
> One way to work around this is to use a buffer for the content of the loop.
>
> \startbuffer[type]
> \type{a    b c}
> \stopbuffer
>
> \starttext
> \dorecurse{10}{\inlinebuffer[type]\par}
> \stoptext
>

Many thanks for the answer!
It seems that the buffer mechanism is quite a powerful resort for the macro
language.

Sylvain

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