Peter Münster schrieb:

On Sun, 8 Feb 2009, Alan Stone wrote:

...

Re: http://wiki.contextgarden.net/System_Macros/Branches_and_Decisions

What kind of emptyness do \doifempty, \doifnotempty, \doifemptyelse test ?

Hello Alan,

Here a small test file:

\def\Empty{} \def\Macro#1{argument is \doifemptyelse{#1}{empty}{full}} \starttext \quotation{Remember to expand it yourself where needed.}

\Macro{}, \Macro{blabla}

Nothing: \doifemptyelse{}{empty}{full}

\type{\Empty}: \doifemptyelse{\Empty}{empty}{full}

\type{all expanded}: \expanded{\doifemptyelse{\Empty}{empty}{full}}

\type{with \expandafter}: \expandafter\doifemptyelse\expandafter{\Empty}{empty}{full}

You can use ConTeXt's \ExpandAfter: \ExpandAfter\doifemptyelse{\Empty}{empty}{full}

\stoptext

@Alan: It's better to use \doifsomething / \doifelsenothing because they work also with macro content. Wolfgang