Re: [NTG-context] Check the character after a macro

Am 01.05.2015 um 20:41 schrieb Sam Ḥilluc :

On 2015-05-01 19:38, Otared Kavian wrote:

...

Hi,

You have several commands in ConTeXt doing what you are seeking to do: please look at the examples below:

%%% begin do-if-inset.tex \starttext \type{\doifinset{A}{A,B,C}{should go}:} \doifinset{A}{A,B,C}{should go}

\type{\doifinset{D}{A,B,C}{should go}:} \doifinset{D}{A,B,C}{should participate}

\type{\doifnotinset{}{A,B,C}{not in the set}:} \doifnotinset{}{A,B,C}{not in the set}

\type{\doifnotinset{D}{A,B,C}{not in the set}:} \doifnotinset{D}{A,B,C}{not in the set}

\doifinsetelse{D}{A,B,C}{it is in the set}{it is not in the set}

\define\test{B}

\type{\doifinsetelse{\test}{A,B,C}{\test\ is in the set}{\test\ is not in the set}}

\doifinsetelse{\test}{A,B,C}{\test\ is in the set}{\test\ is not in the set} \stoptext %%% end do-if-inset.tex

Best regards: OK

This works for testing if a given character is in a set, but how can I retrieve that character just after the defined macro.

To give an example, a macro that adds a dot if the next character is not a comma.

\MyMacro{text1} text2 -> text1. text2 \MyMacro{text1}, text2 -> text1, text2

You can use the \doifelsenextchar command to check the character after your command. \define[1]\MyMacro {\doifelsenextchar{,} {#1} {#1. }} \starttext \MyMacro{left} right \MyMacro{left}, right \stoptext The limitation of this method is that you check only for one character at a time and when want to check for more you have to use multiple \doifelsenextchar lines. \doifelsenextchar{,} {...} {\doifelsenextchar{.} {...} {...}} Wolfgang