diff options
Diffstat (limited to 'tex/context/base/mkiv/syst-lua.mkiv')
| -rw-r--r-- | tex/context/base/mkiv/syst-lua.mkiv | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/syst-lua.mkiv b/tex/context/base/mkiv/syst-lua.mkiv index ca5f9679f..3600dac34 100644 --- a/tex/context/base/mkiv/syst-lua.mkiv +++ b/tex/context/base/mkiv/syst-lua.mkiv @@ -19,6 +19,42 @@ \def\expdoif #1#2{\clf_doifsame {#1}{#2}} \def\expdoifnot #1#2{\clf_doifnotsame {#1}{#2}} +%D Here is variant using a brainwave of the 12\high{+} hour \quotation {Long Road +%D Out of Eden}\footnote {Eden being Backo\TeX\ 2018, where the virtues of the \type +%D {\expanded} primitive were mentioned in talks.} trip. For now I don't really see +%D other useful applications. + +\ifdefined\immediateassignment + + \def\expandeddoif#1#2% + {\immediateassignment\edef\m_syst_string_one{#1}% + \immediateassignment\edef\m_syst_string_two{#2}% + \ifx\m_syst_string_one\m_syst_string_two + \expandafter\firstofoneargument + \else + \expandafter\gobbleoneargument + \fi} + + \def\expandeddoifnot#1#2% + {\immediateassignment\edef\m_syst_string_one{#1}% + \immediateassignment\edef\m_syst_string_two{#2}% + \ifx\m_syst_string_one\m_syst_string_two + \expandafter\gobbleoneargument + \else + \expandafter\firstofoneargument + \fi} + + \def\expandeddoifelse#1#2% + {\immediateassignment\edef\m_syst_string_one{#1}% + \immediateassignment\edef\m_syst_string_two{#2}% + \ifx\m_syst_string_one\m_syst_string_two + \expandafter\firstoftwoarguments + \else + \expandafter\secondoftwoarguments + \fi} + +\fi + % \testfeatureonce{100000}{\doifelse{hello world}{here i am}{}} % 0.3 % \testfeatureonce{100000}{\expandabledoifelse{hello world}{here i am}{}} % 1.5 |