X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fmaster-project%2Freport.git;a=blobdiff_plain;f=Utils%2FLambda.tex;h=8854ccad1c06ed5950078e426dc64ae36f05f391;hp=9486fe3075c397058c3565cba3d461308a5cb1e3;hb=117e935923de81d878be58f742ea60549c0886ef;hpb=36a673fe5851ad9d3dd40eacbfd36349bf87024b

diff --git a/Utils/Lambda.tex b/Utils/Lambda.tex
index 9486fe3..8854cca 100644
--- a/Utils/Lambda.tex
+++ b/Utils/Lambda.tex
@@ -3,21 +3,57 @@
 % transformations.
 %
 
+\startuseMPgraphic{HLine}
+path a, b;
+% Create a rectangle of the full size
+a := origin -- (\MPvar{width}, 0mm);
+% Randomize it a bit
+b := a randomized (\overlaywidth / 25) ;
+% And draw it
+drawoptions (withpen pencircle scaled .75mm withcolor black) ;
+draw b; 
+\stopuseMPgraphic
+
+% Draw a line with the given options. Accepts only the 'width' option. Be
+% careful that these are metapost options, so use \the\textwidth instead of
+% textwidth, and a metapost expression for arithmethic (e.g. 0.5 *
+% \the\textwidth instead of 0.5\textwidth).
+\def\HLine[#1]%
+  {\setupMPvariables[HLine][#1]%
+  \useMPgraphic{HLine}}
+
+\startuseMPgraphic{box}
+path a, b;
+% Create a rectangle of the full size
+a := unitsquare xyscaled(\overlaywidth,\overlayheight);
+% Randomize it a bit
+b := a randomized (\overlaywidth / 25) ;
+% And draw it
+drawoptions (withpen pencircle scaled .75mm withcolor black) ;
+draw b; 
+\stopuseMPgraphic
+
+\defineoverlay[box][\useMPgraphic{box}]
+
+% Define \{start,stop}boxed with a nice metapost box around it.
+\defineframedtext[boxed][width=fit,background=box,frame=off]
+
 % Install the lambda calculus pretty-printer, as defined in pret-lam.lua.
 \installprettytype [LAM] [LAM]
 % Define \startlambda \stoplambda
-\definetyping[lambda][option=LAM,style=sans]
+\definetyping[lambda][option=LAM,style=sans,before=\startboxed,after=\stopboxed]
+
 % Define \lam{} (since \lambda is taken)
 \definetype[lam][option=LAM,style=sans]
 
 % Install the transformation pretty-printer, as defined in pret-trans.lua.
 \installprettytype [TRANS] [TRANS]
 % Define \starttrans \stoptrans
-\definetyping[trans][option=TRANS,style=normal,before=,after=]
+\definetyping[trans][option=TRANS,style=normal,before=\startboxed,after=\stopboxed]
 
 % Install the haskell pretty-printer, as defined in pret-haskell.lua.
 \installprettytype [HASKELL] [HASKELL]
 % Define \starthaskell \stophaskell
-\definetyping[haskell][option=HASKELL,before=,after=]
+\definetyping[haskell][option=HASKELL,before=\startboxed,after=\stopboxed]
 % Define \hs
 \definetype[hs][option=HASKELL,style=mono]