verb-eif.mkii / last modification: 2020-01-30 14:15
%D \module
%D   [       file=verb-eif,
%D        version=2000.08.23,
%D          title=\CONTEXT\ Verbatim Macros,
%D       subtitle=Pretty Eiffel Verbatim,
%D         author={Berend de Boer \& Hans Hagen},
%D           date=\currentdate,
%D      copyright={Berend de Boer \& Hans Hagen}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

% This module will be cleaned up a bit in the process of more
% flexible verbatim options.

\writestatus{loading}{ConTeXt Verbatim Macros / Pretty EIFFEL Verbatim}

%D \startbuffer
%D \startEIFFEL
%D class TEST
%D
%D creation
%D   make
%D
%D feature -- creation
%D
%D   make is
%D     do
%D       print ("hello world")
%D     end
%D
%D end
%D \stopEIFFEL
%D \stopbuffer
%D
%D
%D If a variable in a comment is quoted with `..', it is typeset
%D as a variable (common Eiffel convention for pretty typesetters):
%D
%D \startbuffer
%D \startEIFFEL
%D class TEST
%D
%D feature
%D
%D   say (something: STRING) is
%D      -- say `something' to stdout
%D     do
%D       print (something)
%D     end
%D
%D end -- class TEST
%D \stopEIFFEL
%D \stopbuffer
%D
%D
%D Recommended, OOSC2 style setting is:
%D
%D \setuptyping
%D   [EIFFEL]
%D   [margin=1em,palet=,color=blue,style=\it,icommand=\bf,ccommand=\tf]
%D

%D We borrow most of the macros from the \PERL\ driver.

\ifdefined\setupprettyPLtype \else \loadmarkfile{verb-pl} \fi

\unprotect

%D \EIFFEL\ has only the one line comment sequence \type{--}.

\gdef\EIFsetspecials%
  {\PLsetspecials
   \setpretty`\#=32
   \setpretty`\{=33 \setpretty`\}=33
   \setpretty`\[=33 \setpretty`\]=33 \setpretty`\(=33 \setpretty`\)=33
   \setpretty`\;=33 \setpretty`\:=33
   \setpretty`\!=33 \setpretty`\?=33
   \setpretty`\==33 \setpretty`\~=33 \setpretty`\<=33 \setpretty`\>=33
   \setpretty`\-=33 \setpretty`\+=33 \setpretty`\/=33 \setpretty`\*=33
   \setpretty`\^=33
   \setpretty`\%=41 \setpretty`\-=45
   \setpretty`\`=81 \setpretty`\'=82 }

\gdef\EIFsethandlers%
  {\PLsethandlers
   \installprettyhandler 33 \EIFtypesymbol
   \installprettyhandler 45 \EIFtypefourfive
   \installprettyhandler 81 \EIFtypeeightone
   \installprettyhandler 82 \EIFtypeeighttwo
   \installprettyhandler 90 \EIFtypenine }

\gdef\EIFsetcontrols%
  {\PLsetcontrols
   \def\flushrestofverbatimline%
     {\endPLtypesix
      \inPLcommentfalse
      \verbatimfont
      \PLverbosefalse
      \PLverboseskipped=0}}

\gdef\EIFsetvariables
  {\PLsetvariables}

\gdef\setupprettyEIFtype%
  {\def\prettyidentifier{EIF}%
   \let\PLidentifiers=\EIFidentifiers
   \let\PLvariables=\EIFvariables
   \EIFsetvariables
   \EIFsetcontrols
   \EIFsethandlers
   \EIFsetspecials
   \PLsetdiagnostics}

% symbols should appear in roman

\gdef\EIFtypesymbol#1%
  {\endPLtypesix
   \ifinPLcomment
     \getpretty{#1}%
   \else
     {\prettynaturalfont\/%
      \beginofpretty[\!!prettythree]\getpretty{#1}\endofpretty}%
   \fi}

% recognize comments

\gdef\EIFtypefourfive%
  {\handlenextnextpretty\doEIFtypefourfive\PLtypefourtwo}

\gdef\doEIFtypefourfive#1#2%
  {\endPLtypesix
   \getprettydata{#2}%
   \ifnum\prettytype=45
     \let\next=\dodoEIFtypefourfive
   \else
     \let\next=\PLtypefourtwo
   \fi
   \next{#1}#2}

\gdef\dodoEIFtypefourfive% #1%
  {\endPLtypesix
   \handlenextnextpretty\dododoEIFtypefourfive\dodododoPLtypefourfive}

\gdef\dododoEIFtypefourfive%
  {\ifnewpretty\expandafter\handlenewpretty\fi\dodododoEIFtypefourfive}

\gdef\dodododoEIFtypefourfive#1#2%
  {\ifinPLcomment
     \getpretties{#1}{#2}%
   \else
     \ifinPLdouble
       \getpretties{#1}{#2}%
     \else
       \global\inPLcommenttrue
       \PLverbosecorrection
       \def\next{\beginofpretty[\!!prettyone]\getpretties{#1}{#2}\endofpretty\prettynaturalfont}%
       \expandafter\next
     \fi
   \fi}

% recognize `name' in comments and format them like variables

\gdef\EIFtypeeightone#1%
  {\endPLtypesix
   \ifinPLcomment
     \verbatimfont
   \else
     \getpretty{#1}%
   \fi}

\gdef\EIFtypeeighttwo#1%
  {\endPLtypesix
   \ifinPLcomment
     \prettynaturalfont
   \else
     {\prettynaturalfont\/%
      \beginofpretty[\!!prettythree]\getpretty{#1}\endofpretty}%
   \fi}

% double quote

\gdef\EIFtypenine#1%
  {\endPLtypesix
   \ifinPLcomment
     \getpretty{#1}%
   \else\ifinPLsingle
     \getpretty{#1}%
   \else\ifinPLdouble
     \global\inPLdoublefalse
     {\prettynaturalfont\/%
      \beginofpretty[\!!prettythree]\getpretty{#1}\endofpretty}%
   \else
     \global\inPLdoubletrue
     {\prettynaturalfont
      \beginofpretty[\!!prettythree]\getpretty{#1}\endofpretty}%
   \fi\fi\fi}

\useprettyidentifiers \EIFidentifiers \EIFsetspecials
  alias all and as check class create creation debug deferred do else
  elseif end ensure expanded export external false feature from frozen
  if implies indexing infix inherit inspect invariant is like local
  loop not obsolete old once or prefix redefine rename require rescue
  precursor retry select separate strip then true undefine unique
  until variant when xor

\useprettyidentifiers \EIFvariables \EIFsetspecials
  not-yet-defined

\protect \endinput