<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 8 Apr 2023 at 14:15, <<a href="mailto:mskala@ansuz.sooke.bc.ca">mskala@ansuz.sooke.bc.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">... and the others listed as commands in the<br>
table on on page 90 in Appendix B of the Metapost manual. These are what<br>
other languages might call primitives. But "input" is not mentioned in<br>
that table, nor in the formal syntax. Maybe it's implemented at a lower<br>
level in the parser than the others and was omitted for that reason.<br>
<br></blockquote><div><br></div><div>It'a a primitive.</div><div>mp.w:mp_primitive (mp, "input", mp_input, 0)<br></div><div>The metapost manual presumes that one knows the metafont book.</div><div><br></div><div>--</div><div>luigi</div></div></div>