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44 lines
953 B
Markdown
44 lines
953 B
Markdown
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<div class="short">
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`col : %col`
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============
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Tuples
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------
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The `:` runes construct [tuples]().
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There is no natural `:` rune. Instead, all of them derive from the
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autocons property of `++twig`, as show below.
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++ twig $& [p=twig q=twig]
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Namely, a cell of two twigs is a twig producing a cell of the results of
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the two original sub-twigs.
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The `:` runes produce one of three categories of tuples
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</div>
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#### Tuples of determinate size:
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[`:-`]() Tuples of two elements, `p` and `q`. [`:_`]() Tuples of two
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reversed elements, `q` and `p`. Used to ensure vertical code flow.\
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[`:+`]() Tuples of three elements `p`, `q`, and `r`. [`:^`]() Tuples of
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four elements `p`, `q`, `r`, and `s`.
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<hr></hr>
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#### Tuples of indeterminate size:
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[`:*`]() Tuples of n elements. [`:~`]() Null-terminated tuples of n
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elements.
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#### Tuples used for interpolation:
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[`:/`]() Tuple designed to be interpolated into an XML structure.
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<hr></hr>
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<kids></kids>
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