[NTG-context] troubles with xtable (might be because I nest the same xtables)

[NTG-context] troubles with xtable (might be because I nest the same xtables)

[Damien Thiriet via ntg-context]

Hello,

I have troubles with \definextable, something I obviously didn't 
understand
This MWE compiles well.

\definextable [Test]
\setupxtable [Test]
    [frame=off]
\starttext
\startxtable %[Test]
    \startxrow
       \startxcell [Test]
bla
       \stopxcell
       \startxcell [Test]
bli
       \stopxcell
    \stopxrow
\stopxtable
\stoptext

However, if I uncomment [Test] afetr \startxtable, I get this error:

tex memory      > bumping category 'parameter' succeeded, details: 
all=120000 | ini=-1 | max=100000 | mem=30000 | min=20000 | ptr=20002 | 
set=100000 | stp=10000 | top=20002
tex memory      > bumping category 'parameter' succeeded, details: 
all=160000 | ini=-1 | max=100000 | mem=40000 | min=20000 | ptr=30002 | 
set=100000 | stp=10000 | top=30002
tex memory      > bumping category 'input' succeeded, details: 
all=960000 | ini=-1 | max=100000 | mem=30000 | min=10000 | ptr=20001 | 
set=100000 | stp=10000 | top=20001
tex memory      > bumping category 'parameter' succeeded, details: 
all=200000 | ini=-1 | max=100000 | mem=50000 | min=20000 | ptr=40002 | 
set=100000 | stp=10000 | top=40002
tex memory      > bumping category 'parameter' succeeded, details: 
all=240000 | ini=-1 | max=100000 | mem=60000 | min=20000 | ptr=50002 | 
set=100000 | stp=10000 | top=50002
tex memory      > bumping category 'input' succeeded, details: 
all=1280000 | ini=-1 | max=100000 | mem=40000 | min=10000 | ptr=30001 | 
set=100000 | stp=10000 | top=30001
tex memory      > bumping category 'parameter' succeeded, details: 
all=280000 | ini=-1 | max=100000 | mem=70000 | min=20000 | ptr=60002 | 
set=100000 | stp=10000 | top=60002
tex memory      > bumping category 'parameter' succeeded, details: 
all=320000 | ini=-1 | max=100000 | mem=80000 | min=20000 | ptr=70002 | 
set=100000 | stp=10000 | top=70002
tex memory      > bumping category 'input' succeeded, details: 
all=1600000 | ini=-1 | max=100000 | mem=50000 | min=10000 | ptr=40001 | 
set=100000 | stp=10000 | top=40001
tex memory      > bumping category 'parameter' succeeded, details: 
all=360000 | ini=-1 | max=100000 | mem=90000 | min=20000 | ptr=80002 | 
set=100000 | stp=10000 | top=80002
tex memory      > bumping category 'parameter' succeeded, details: 
all=400000 | ini=-1 | max=100000 | mem=100000 | min=20000 | ptr=90002 | 
set=100000 | stp=10000 | top=90002
tex memory      > bumping category 'input' succeeded, details: 
all=1920000 | ini=-1 | max=100000 | mem=60000 | min=10000 | ptr=50001 | 
set=100000 | stp=10000 | top=50001
tex memory      > bumping category 'parameter' failed, details: 
all=400000 | ini=-1 | max=100000 | mem=100000 | min=20000 | ptr=100002 | 
set=100000 | stp=10000 | top=100002
tex error       > tex error on line 3 in file 
virtual://buffer.x_table_1.1: TeX capacity exceeded, sorry 
[parameter=100000]

{}>Test:[bad 43]

<macro> \doxtableparentparameter
     #1#2->
     \ifrelax #1\doxtablerootparameter {#2}\else \doxtableparameter 
{#1}{#2}\fi
<macro> \doxtableparameter
     #1#2->\ifcsname #1:#2\endcsname \csnamestring \else \expandafter 
\doxtableparentparameter \csname #1:\s!parent \endcsname {#2}
     \fi
<macro> \doxtableparentparameter
     #1#2->\ifrelax #1\doxtablerootparameter {#2}\else \doxtableparameter 
{#1}{#2}
     \fi
<macro> \doxtableparameter
     #1#2->\ifcsname #1:#2\endcsname \csnamestring \else \expandafter 
\doxtableparentparameter \csname #1:\s!parent \endcsname {#2}
     \fi
<macro> \doxtableparentparameter
     #1#2->\ifrelax #1\doxtablerootparameter {#2}\else \doxtableparameter 
{#1}{#2}
     \fi
<macro> \doxtableparameter
     #1#2->\ifcsname #1:#2\endcsname \csnamestring \else \expandafter 
\doxtableparentparameter \csname #1:\s!parent \endcsname {#2}
     \fi
  ...

<line 7.3>
     b
     la

<empty file>
If you really absolutely need more capacity, you can ask a wizard to 
enlarge me.

Why can't I nest the same kind of xtable?
Thanks,

Damien
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[NTG-context] Re: troubles with xtable (might be because I nest the same xtables)

[Wolfgang Schuster]

Damien Thiriet via ntg-context schrieb am 24.11.2024 um 13:19:
> Hello,
> 
> I have troubles with \definextable, something I obviously didn't understand
> This MWE compiles well.
> 
> \definextable [Test]
> \setupxtable [Test]
>     [frame=off]
> \starttext
> \startxtable %[Test]
>     \startxrow
>        \startxcell [Test]
> bla
>        \stopxcell
>        \startxcell [Test]
> bli
>        \stopxcell
>     \stopxrow
> \stopxtable
> \stoptext
> 
> However, if I uncomment [Test] afetr \startxtable, I get this error:
> 
> [...]
> 
> Why can't I nest the same kind of xtable?

These are *not* nested xtables.

Your problem here is a circular reference where a parameter (e.g. 
framecolor) tries to load the value of its parent because it has no 
value itself. Since you set the parent to itself it results in an 
endless loop until it runs out of memory.

To avoid this problem uses different instance name for the table as a 
whole and the named parameters for a cell, row etc.

\definextable [Tableinstance] [framecolor=red]

\setupxtable [Parameters] [foregroundstyle=italic]

\starttext

\startxtable [Tableinstance]
   \startxrow
     \startxcell [Parameters]
       bla
     \stopxcell
   \stopxrow
\stopxtable

\stoptext

Wolfgang
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