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Option sets: a .o target for shared parameters

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A named group of optional parameters, declared once and used by several
klammers, so a writer learns one vocabulary instead of a spelling per
klammer.  The "o" target is a pseudo-target beside "k": "k" declares a
klammer's interface and documents it, "o" declares an option interface and
documents it, and neither produces output for any target.

    @@caption_args.o :caption :number.bool true :caption_side.side
    : Arguments that define a caption for a block element @@

    @@code.k :filename @hpos_args :hpos left @ @caption_args :caption_side top @
    | text.literal : A source file displayed verbatim @@

A set is used only in the parameter list of a ".k" declaration -- the one
place a klammer's interface is declared once for all of its targets -- and
is resolved as that list is read.  Names and types come from the set; a
default may be overridden where it is used.  A klammer application in a
parameter list is now a definition-time error.

The SKS gains the sets caption_args and hpos_args (:hpos and :offset), and
@table, @image, @image_grid, @reference and @show gain .k declarations.  A
distance is no longer written as a position: :hpos 4em is rejected, and the
same layout is :hpos left :offset 4em.  Code listings are numbered by
default, like tables and figures.

New engine sources mac/option_set{,_registry}.{h,cpp}; tst/ ships two more
suites, option_set_test.sh and signature_test.sh (twelve in all).

 (from dev 34e536cb0329)
This commit is contained in:
Andy Kopra
2026-08-06 13:11:37 +02:00
parent 4306dcd490
commit 6e7596ab2e
37 changed files with 2198 additions and 267 deletions
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7
mac/argument_set.h
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@@ -13,6 +13,13 @@ std::tuple<std::vector<std::vector<Katom>>,std::vector<std::vector<Katom>>,std::
argument_split(std::vector<Katom>::const_iterator kbegin, std::vector<Katom>::const_iterator kend,
long unsigned int positional_limit = std::numeric_limits<int>::max());
// The katoms of a parameter list, split into one list per parameter:
// positional first, then optional (each beginning with its option-name
// katom). An option set keeps the katoms of its members this way, because
// those katoms are what a declaration using the set ends up declaring.
std::tuple<std::vector<std::vector<Katom>>,std::vector<std::vector<Katom>>>
parameter_split(std::vector<Katom>::const_iterator kbegin, std::vector<Katom>::const_iterator kend);
class Parameter_set
{
public: