SIMPLE SOLUTIONS

LATEXML::CORE::STOMACH(3PM) - Linux man page online | Library functions

Digests tokens into boxes, lists, etc.

Chapter
2018-02-26
LaTeXML::Core::Stomach(3pm) User Contributed Perl Documentation LaTeXML::Core::Stomach(3pm)

NAME

"LaTeXML::Core::Stomach" - digests tokens into boxes, lists, etc.

DESCRIPTION

"LaTeXML::Core::Stomach" digests tokens read from a LaTeXML::Core::Gullet (they will have already been expanded). It extends LaTeXML::Common::Object. There are basically four cases when digesting a LaTeXML::Core::Token: A plain character is simply converted to a LaTeXML::Core::Box recording the current LaTeXML::Common::Font. A primitive If a control sequence represents LaTeXML::Core::Definition::Primitive, the primitive is invoked, executing its stored subroutine. This is typically done for side effect (changing the state in the LaTeXML::Core::State), although they may also contribute digested material. As with macros, any arguments to the primitive are read from the LaTeXML::Core::Gullet. Grouping (or environment bodies) are collected into a LaTeXML::Core::List. Constructors A special class of control sequence, called a LaTeXML::Core::Definition::Constructor produces a LaTeXML::Core::Whatsit which remembers the control sequence and arguments that created it, and defines its own translation into "XML" elements, attributes and data. Arguments to a constructor are read from the gullet and also digested. Digestion "$list = $stomach->digestNextBody;" Return the digested LaTeXML::Core::List after reading and digesting a `body' from the its Gullet. The body extends until the current level of boxing or environment is closed. "$list = $stomach->digest($tokens);" Return the LaTeXML::Core::List resuting from digesting the given tokens. This is typically used to digest arguments to primitives or constructors. "@boxes = $stomach->invokeToken($token);" Invoke the given (expanded) token. If it corresponds to a Primitive or Constructor, the definition will be invoked, reading any needed arguments fromt he current input source. Otherwise, the token will be digested. A List of Box's, Lists, Whatsit's is returned. "@boxes = $stomach->regurgitate;" Removes and returns a list of the boxes already digested at the current level. This peculiar beast is used by things like \choose (which is a Primitive in TeX, but a Constructor in LaTeXML). Grouping "$stomach->bgroup;" Begin a new level of binding by pushing a new stack frame, and a new level of boxing the digested output. "$stomach->egroup;" End a level of binding by popping the last stack frame, undoing whatever bindings appeared there, and also decrementing the level of boxing. "$stomach->begingroup;" Begin a new level of binding by pushing a new stack frame. "$stomach->endgroup;" End a level of binding by popping the last stack frame, undoing whatever bindings appeared there. Modes "$stomach->beginMode($mode);" Begin processing in $mode; one of 'text', 'display-math' or 'inline-math'. This also begins a new level of grouping and switches to a font appropriate for the mode. "$stomach->endMode($mode);" End processing in $mode; an error is signalled if $stomach is not currently in $mode. This also ends a level of grouping.

AUTHOR

Bruce Miller <@nist.gov>
Public domain software, produced as part of work done by the United States Government & not subject to copyright in the US.
perl v5.26.1 2018-02-26 LaTeXML::Core::Stomach(3pm)
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