A syntax sugar for ConTeXt

A syntax sugar for ConTeXt

[Sylvain Hubert]

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Dear List,

I'm experimenting with a new syntax for ConTeXt and would appreciate it a
lot if you could give some opinions/advice on it.

https://github.com/champignoom/luax

Details in the README. Basically it's lua code faking tex, while remaining
a decent programming language, and saving keystrokes to the level of tex
compared to \ctxlua -only codes

A major motivating example is the table. There are multiple implementations
of table inside and outside ConTeXt, each of which uses its own ad-hoc
syntax, but at the end of the day they're just mimicking 2d arrays with
some variations. Here's an example in Context an excursion
<http://www.pragma-ade.com/general/manuals/ma-cb-en.pdf> using xtable
sugared with the new syntax:
```
  \xtable.setup[
    split='yes',
    header='repeat',
    offset='4pt',
  ]

  \xtable[
    head={
         align='middle', foregroundstyle='bold',
         {{nx=6, "Decline of wealth in Dutch florine (Dfl)"}},
         {foregroundstyle='bold', {width='1.2cm', 'Year'}, '1.000--2.000',
'2.000--3.000', '3.000-5.000', '5.000-10.000', 'over 10.000'},
    },
    next={
         {{nx=6, align='middle', foregroundstyle='bold', "Decline of wealth
in Dutch florine (Dfl) / Continued"}},
         {foregroundstyle='bold', {'Year', '1.000--2.000', '2.000--3.000',
'3.000-5.000', '5.000-10.000', 'over 10.000'}},
    },
    body={
    align='middle',
         {1675, \{\math{22}}, '~7', '~5', '~4', '~5'},
         {1724, '~4', '~4', '--', '~4', '~3'},
    },
  ]
```

Best,
Sylvain

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