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author | Karl Berry <karl@freefriends.org> | 2021-03-10 22:25:42 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2021-03-10 22:25:42 +0000 |
commit | 7a1fbab95b87f9c733da00b296f5134ca3805060 (patch) | |
tree | 6f2784e002f5f8871f46284c5b52506bab2771bb /Master/texmf-dist/tex/generic | |
parent | 201406d49d5e88b2cbb3bf40a03dbda41d90b0a1 (diff) |
tokcycle (10mar21) (branch)
git-svn-id: svn://tug.org/texlive/branches/branch2020.0@58262 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/generic')
-rw-r--r-- | Master/texmf-dist/tex/generic/tokcycle/tokcycle.tex | 102 |
1 files changed, 74 insertions, 28 deletions
diff --git a/Master/texmf-dist/tex/generic/tokcycle/tokcycle.tex b/Master/texmf-dist/tex/generic/tokcycle/tokcycle.tex index eeba320682b..9aaec68b728 100644 --- a/Master/texmf-dist/tex/generic/tokcycle/tokcycle.tex +++ b/Master/texmf-dist/tex/generic/tokcycle/tokcycle.tex @@ -1,7 +1,7 @@ \def\tcname {tokcycle} -\def\tcver {1.2} +\def\tcver {1.3} % -\def\tcdate {2020/10/01} +\def\tcdate {2021/03/10} % % Author : Steven B Segletes, Christian Tellechea (contributor) % Maintainer : Steven B Segletes @@ -22,8 +22,7 @@ \expandafter\the\expandafter\cytoks\expanded{#5}\endtokcycraw} % ENVIRONMENT FORM \long\def\tokencycle#1#2#3#4{\begingroup\let\endtokencycle\endtokcycraw - \aftertokcycle{\the\cytoks\expandafter\endgroup\expandafter\tcenvscope - \expandafter{\the\cytoks}}\tokcycraw{#1}{#2}{#3}{#4}} + \aftertokcycle{\the\cytoks\tcendgroup}\tokcycraw{#1}{#2}{#3}{#4}} % XPRESS-INTERFACE MACRO FORM \long\def\tokcyclexpress#1{\tokcycrawxpress#1\endtokcycraw} % XPRESS-INTERFACE \expanded-ARGUMENT MACRO FORM @@ -31,16 +30,16 @@ \expandafter\tokcycrawxpress\expanded{#1}\endtokcycraw} % XPRESS-INTERFACE ENVIRONMENT FORM \def\tokencyclexpress{\begingroup\let\endtokencyclexpress\endtokcycraw - \aftertokcycle{\the\cytoks\expandafter\endgroup\expandafter\tcenvscope - \expandafter{\the\cytoks}}\tokcycrawxpress} + \aftertokcycle{\the\cytoks\tcendgroup}\tokcycrawxpress} % INITIALIZATION & INTERNAL TOOLS +\def\tcendgroup{\expandafter\endgroup\expandafter\tcenvscope\expandafter{\the\cytoks}} \def\tcenvscope{\cytoks}% CAN SET TO \global\cytoks TO OVERCOME SCOPE LIMITS \edef\restorecatcode{\catcode\number`\@=\number\catcode`\@\relax} \catcode`\@11 \newif\iftc@implicitgrp \newif\if@argnext \newtoks\tc@tok -\newcount\tc@depth +\newcount\tcdepth \def\tc@gobble#1{} \def\tc@deftok#1#2{\let#1= #2\empty} \tc@deftok\tc@sptoken{ } @@ -54,9 +53,8 @@ \long\def\tc@testxifx{\tc@earg\tctestifx} \long\def\test@ifmacro#1{\tctestifcatnx#1\relax} \def\tc@addtoks#1#2{\toks#1\expandafter{\the\toks#1#2}} -\def\addtc@depth{\advance\tc@depth 1} -\def\subtc@depth{\tc@depth=\numexpr\tc@depth-1\relax} -\def\tc@resetifs{\activetokfalse\implicittokfalse\tc@implicitgrpfalse +\def\add@tcdepth{\advance\tcdepth 1\relax} +\def\sub@tcdepth{\advance\tcdepth-1\relax}\def\tc@resetifs{\activetokfalse\implicittokfalse\tc@implicitgrpfalse \catSIXfalse\activecharfalse\activetokunexpandablefalse \def\theactivespace{}} \long\def\count@stringtoks#1{\tc@earg\count@toks{\string#1}} @@ -79,18 +77,29 @@ \long\def\tokcycleenvironment#1#2#3#4#5{\expandafter\def\expandafter#1% \expandafter{\expandafter\let\csname end\expandafter\tc@gobble \string#1\endcsname\endtokcycraw\tokencycle{#2}{#3}{#4}{#5}}} -\long\def\processtoks#1{\addtc@depth\@tokcycle#1\endtokcycraw } +\long\def\xtokcycleenvironment#1#2#3#4#5#6#7{\expandafter\def\expandafter + #1\expandafter{\expandafter\let\csname end\expandafter\tc@gobble + \string#1\endcsname\endtokcycraw\begingroup + \long\def\tcafterenv####1{\tc@defx\tcendgroup{\tcendgroup####1}}% + \aftertokcycle{#7\the\cytoks\tcendgroup}#6\tokcycraw{#2}{#3}{#4}{#5}}} +\long\def\processtoks#1{\@tokcycle#1\endtokcycraw} \def\whennotprocessingparameter#1#2{\tctestifcon\if@argnext{\@argnextfalse\cytoks \expandafter{\the\cytoks###1}}{\tctestifcon\ifcatSIX{\@argnexttrue}{#2}}} +\long\def\truncategroup#1{\tctestifx{\endtokcycraw#1}{#1}{\truncategroup}} +\long\def\truncatecycle#1{\tctestifx{\endtokcycraw#1}{\tctestifnum{\tcdepth=0} + {#1}{\truncatecycle}}{\tctestifx{\sub@tcdepth#1}{#1} + {\tctestifx{\exit@grouped#1}{#1}{}}\truncatecycle}} +\long\def\truncategroupiftokis#1#2{\tctestifx{\tc@next#1}{\truncategroup}{#2}} +\long\def\truncatecycleiftokis#1#2{\tctestifx{\tc@next#1}{\truncatecycle}{#2}} % ESSENTIAL METHOD: STREAMING MACRO WITH TERMINATOR: % \tokcycraw{<Char>}{<Group>}{<Macro>}{<Space>}<input-stream>\endtokcycraw \long\def\tokcycraw#1#2#3#4{\def\@chrT##1{#1}\long\def\@grpT##1{#2}% \long\def\@macT##1{#3}\def\@spcT##1{#4}\tokcycrawxpress} % ENTRY POINT FOR XPRESS METHOD WITHOUT EXPLICIT ARGUMENTS -\def\tokcycrawxpress{\cytoks{}\tc@depth=1\relax\@tokcycle} +\def\tokcycrawxpress{\cytoks{}\tcdepth=0\relax\@tokcycle} % CODE TO EXECUTE AT COMPLETION \long\def\aftertokcycle#1{\def\@aftertokcycle{#1}} -\def\endtokcycraw{\subtc@depth\tctestifnum{\tc@depth=0}{\@aftertokcycle}{}} +\def\endtokcycraw{\tctestifnum{\tcdepth=0}{\@aftertokcycle}{}} % LOOP ENTRY POINT \def\@tokcycle{\tc@resetifs\futurelet\tc@next\detect@CANTabsorb} \def\detect@CANTabsorb{\tctestifx{\tc@next\tc@sptoken}{\stringify\@@@@@@spcT}% @@ -126,8 +135,8 @@ {\begingroup\catcode`#1=\active \xdef\@tmp{\scantokens{#1\noexpand}}\endgroup \expandafter\implicitgrpfork\@tmp\@tokcycle}% ACTIVE CHAR \bgroup }} -\def\@@grpT#1{\tctestifcon\ifstripgrouping{\@grpT{#1}}% - {\groupedcytoks{\@grpT{#1}}}\@tokcycle} +\long\def\@@grpT#1{\add@tcdepth\tctestifcon{\ifstripgrouping}{% + \@grpT{#1}}{\groupedcytoks{\@grpT{#1}}}\sub@tcdepth\@tokcycle} % \ COMMANDS (MACROS AND IMPLICITS) \long\def\backslashcmds#1{% \test@ifmacro#1{\tctestifcon\ifcatSIX{\implicittoktrue\@chrT#1}{\@macT#1}}% @@ -146,12 +155,12 @@ \global\let\implicitsixtok\six@str\tc@tok{\implicitsixtok}}% {\tc@tok\expandafter{\string#1}\tctestifnum{\number\catcode`#1=6}% {}{\activetoktrue\implicittoktrue}}} -% DIRECTIVES FOR HANDLING GROUPS RECURSIVELY; DEFINE tokcycle GROUPING CHARS -\def\@defgroupedcytoks#1{\long\def\groupedcytoks##1{% - \begingroup\cytoks{}##1\expandafter\endgroup\expandafter +% DIRECTIVES FOR HANDLING GROUPED OUTPUT; DEFINE tokcycle GROUPING CHARS +\long\def\groupedcytoks#1{\begingroup\cytoks{}#1\exit@grouped} +\def\defineexit@grouped#1{\def\exit@grouped{\expandafter\endgroup\expandafter \addcytoks\expandafter{\expandafter#1}}} \def\settcGrouping#1{\def\@tmp##1{#1}\tc@defx\@@tmp{\@tmp{\the\cytoks}}% - \tc@earg\@defgroupedcytoks{\@@tmp}} + \tc@earg\defineexit@grouped{\@@tmp}} % FAUX TOKENIZATION OF COMMAND NAME (WHEN cat0 TOKEN HAS BEEN MADE cat12) \def\csmk#1{\def\csaftermk{#1}\toks0{}\@csmkA} \def\@csmkA{\futurelet\@tmp\@csmkB} @@ -208,10 +217,10 @@ \endinput EDIT HISTORY -v1.0 2019/8/21 +v1.0 2019/08/21 - Initial release -v1.1 2019/9/27 +v1.1 2019/09/27 - Introduced \ifactivechar, \ifactivetokunexpandable - Tightened up consistent definition of implicit (to exclude primitives) - Rewrote active token trapping logic, to differentiate between active @@ -230,10 +239,47 @@ v1.12 2020/02/11 - Redefined \tc@defx and \tc@earg to omit #2 as part of definition - Corrected \trapcatSIXb definition to account for revised \tc@earg definition. -v1.2 2020/10/1 - -Added/fixed capability to handle active-implicit spaces. While the - #1 passed to the \Spacedirective, in such a case, is an implicit - space \tc@sptoken, the name of the active character from whence it - originated in the input stream is stored as an explicit cat-12 token - in the definition \theactivespace. The flags \implicittok and \activetok - are both set true, and the \activechar flag is checked, as well.
\ No newline at end of file +v1.2 2020/10/01 + - Added/fixed capability to handle active-implicit spaces. While the + #1 passed to the \Spacedirective, in such a case, is an implicit + space \tc@sptoken, the name of the active character from whence it + originated in the input stream is stored as an explicit cat-12 token + in the definition \theactivespace. The flags \implicittok and \activetok + are both set true, and the \activechar flag is checked, as well. + +v1.3 2021/03/09 + - Introduced \xtokcycleenvironment, similar to \tokcycleenvironment, but + allows two additional arguments, defining the setup and trailing code + that will be run prior to the invocation and following conclusion of the + token cycle. + - Introduced \truncategroup, a directive to discard remaining tokens in the + current token-cycle group and close the group. + - Introduced \truncatecycle, a directive to discard remaining tokens in the + token-cycle input stream, but closing any open groups. + - Introduced \truncategroupiftokis{}{} to conditionally issue a \truncategroup + if the current token under consideration matches the 1st argument. + - Introduced \truncatecycleiftokis{}{} to conditionally issue a \truncatecycle + if the current token under consideration matches the 1st argument. + - Introduced \tcendgroup as a form of \endgroup that saves contents of + \cytoks upon group exit. Gives clarity to definitions of \tokencycle + and \tokencyclexpress environments. Available for general used. + - Fixed bug. Made \@@grpT \long, in the event that \par occurs inside a + group. + - Fixed bug. Added \relax to end of \add@tcdepth definition, the absence + of which had prevented timely update of the \tcdepth count. + - Documentation correction: improved explanation of implicit-cat-6 token + limitations. Likewise, added warning regarding active-implicit spaces. + - Documentation prepared with lmodern font, rather than default cm, + for reasons of better PDF hinting. + - Introduced \exit@grouped to the \groupedcytoks definition, for clarity and + ease of \expandafter. + - Reworked logic so that \tcdepth is associated with nested calls to the + Group directive, rather than with each invocation of \processtoks. + This primarily required redefinition of \@@grpT and its components. + - Changed name of \tc@depth to \tcdepth, as it may be a useful parameter for + users to check the token-cycle nesting depth. Therefore, also renamed + \subtc@depth to \sub@tcdepth, \addtc@depth to \add@tcdepth. + - Excised \sub@tcdepth from \endtokcycraw as part of new logic making + \tcdepth associated with the Group directive (also, outer token cycle + operates with depth = 0 rather than 1). + - Renamed \@defgroupedcytoks to \defineexit@grouped, to better match function. |