Hi---
Here's another apparent change on the MP side---for keyword functions, string
parameters no longer accept string variables directly. They do seem to register
them (hasparameter => true) but don't capture the value (getparameter => 0).
Thus:
system > ConTeXt ver: 2021.07.16 22:03 LMTX fmt: 2021.7.21 int:
english/english
metapost > trace > This is MPLIB for LuaMetaTeX, version 3.11, running
in scaled mode.
metapost > trace >
metapost > trace > loading metafun for lmtx, including the plain 1.004
base definitions
metapost > trace >
metapost > trace > >> "string constant fuschia ..."
metapost > trace > >> true
metapost > trace > >> "fuschia"
metapost > trace > >> "string variable fuschia = fuschia ..."
metapost > trace > >> true
metapost > trace > >> 0
metapost > trace > >> "expression containing string variable fuschia =
fuschia ..."
metapost > trace > >> true
metapost > trace > >> "fuschia"
String constant: succeeds
String variable: fails
String expression with string variable: succeeds
Here's the MWE:
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% system > ConTeXt ver: 2021.07.16 22:03 LMTX fmt: 2021.7.21 int:
english/english
\startMPdefinitions
presetparameters "parameters_Test"
[
]
def Test =
applyparameters "parameters_Test" "do_Test"
enddef;
def do_Test =
pushparameters "parameters_Test";
show hasparameter "color";
show getparameter "color";
enddef;
\stopMPdefinitions
\starttext
hello
\startalignment[center]
\startplacefigure
\startMPcode
string fuschia; fuschia = "fuschia";
show "string constant fuschia ...";
Test [ color = "fuschia" ];
show "string variable fuschia = " & fuschia & " ...";
Test [ color = fuschia ];
show "expression containing string variable fuschia = " & fuschia &
" ...";
Test [ color = "" & fuschia ];
\stopMPcode
\stopplacefigure
\stopalignment
goodbye
\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Kevin W. Rudd, Ph.D.
CAPT, USN (Ret)
Computer Architecture & Computer Engineering
Advanced Computing Systems (ACS) Research Program
Laboratory for Physical Sciences (LPS)
443-654-7878
ke...@lps.umd.edu<mailto:ke...@lps.umd.edu>
Visiting Research Professor
United States Naval Academy
r...@usna.edu<mailto:r...@usna.edu>
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