summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/doc/latex/pygmentex/pygmentex_demo.tex
blob: 1b6888022c48e58e05bd245efe6463f981424317 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
\documentclass[10pt,a4paper]{article}
%\usepackage[margin=13mm]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[font=normalsize,format=plain,labelfont=bf,up,textfont=it,up]{caption}
\usepackage{xcolor}
\usepackage{hyperref}
\usepackage[framemethod=tikz]{mdframed}
\usepackage{tcolorbox}
\usepackage{fancyvrb-ex}
\usepackage{tikz}
\usepackage{calc}
\usepackage{pygmentex}
\usepackage{lipsum}

\fvset{gobble=0,showtabs,tabsize=1,frame=lines,framerule=1pt,numbers=left,fontsize=\scriptsize}

\tcbuselibrary{skins,breakable}

\definecolor{shadecolor}{rgb}{0.9,0.9,0.9}
\definecolor{lightgreen}{rgb}{0.8,0.95,0.8}

\begin{document}

\title{Testing the Pygmen\TeX{} package}
\author{José Romildo Malaquias\\
\href{mailto:malaquias@ufop.edu.br}{malaquias@ufop.edu.br}\\
\href{https://bitbucket.org/romildo/pygmentex/src/master/}{bitbucket.org/romildo/pygmentex}
}
\maketitle

\section{The Pygmen\TeX{} package}

This document demonstrates how to use the Pygment\TeX{} package to
typeset code listings with \LaTeX{} and
Pygments\footnote{\url{http://pygments.org/}}.

Pygments is a generic syntax highlighter for general use in all kinds of
software such as forum systems, wikis or other applications that need to
prettify source code.

Pygmen\TeX{} provides an environment and two commands for typesetting code
listings in a \LaTeX{} document:
\begin{itemize}
  \item the \verb|pygmented| environment typesets its contents as a
  source code listing,
  \item the \verb|\inputpygmented| command typesets the contents of a
  file, including the result in the \LaTeX{} document, and
  \item the \verb|\pyginline| command typesets its contents, keeping the
  result in the same line.
\end{itemize}
They accept many options that allow the user to configure the listing in
many ways.

Read the remaining of this document to have an idea of what the package
is capable of.

\section{Requirements}

Current versions of Pygmen\TeX require Python version 3.  Earlier versions
required Python version 2.  All versions require the Python Pygments library.

\section{How to use the package}

\paragraph{1.} Add the package to the document preamble.
\begin{verbatim}
\usepackage{pygmentex}
\end{verbatim}

\paragraph{2.} Use the environment or commands mentioned previously to include source
code listings on your document.

\paragraph{3.} Compile using \texttt{pdflatex}.\footnote{Other \LaTeX compilers
may also work but have not been tested by the author.}
All the source code listings in the document wil be collected and saved in a
temporary file with the extension \texttt{.snippets} in its name.

\paragraph{4.} Run \texttt{pygmentex documentname.snippets}.
The python application \texttt{pygmentex} is
distributed with the Pygmen\TeX{} package).
It will produce another temporary file with the extension
\texttt{.pygmented}, containing \LaTeX{} code for the code listings
previously collected. The next time the document is compiled, they are
included to produce the final typeset document.

\paragraph{5.} Rerun \texttt{pdflatex} as usual.

\paragraph{Note.} Running the external python application
\texttt{pygmentex} can be done automatically from withing \LaTeX{} if
the optional argument \texttt{--shell-escape} is used.

With
\begin{verbatim}
pdflatex --shell-escape <file>
\end{verbatim}
the external run of \texttt{pygmentex} is not needed. It will be run
automatically at the end of the document compilation.

There is a package option \texttt{force} that will force running
\texttt{pygmentex} every time the document is compiled.

\section{First examples}

A simple verbatim text is the first example.

\begin{Example}
\begin{pygmented}[]
Hello world!
  This is a simple demonstration text.
\end{pygmented}
\end{Example}

The followig C program reads two integers and calculates their sum.

\begin{Example}
\begin{pygmented}[lang=c]
#include <stdio.h>
int main(void)
{
   int a, b, c;
   printf("Enter two numbers to add: ");
   scanf("%d%d", &a, &b);
   c = a + b;
   printf("Sum of entered numbers = %d\n", c);
   return 0;
}
\end{pygmented}
\end{Example}

\begin{Example}
  In this program, \pyginline[lang=c]|int| is a type and
  \pyginline[lang=c]|"Enter two numbers to add: "| is a literal string.
\end{Example}

Next you can see a Java program to calculate the factorial of a number.

\begin{Example}
\inputpygmented[lang=java]{Factorial.java}
\end{Example}

\section{Options}
\subsection{\texttt{lang}}
The programming language of the listing code can be specified using the
\verb|lang| option.

To get a list of all available languages, execute the following command
on the command line:
\begin{verbatim}
$ pygmentize -L lexers
\end{verbatim}

\subsection{\texttt{sty}}

Instead of using the default style you may choose another stylesheet
provided by Pygments by its name using the \verb|sty| option.

To get a list of all available stylesheets, execute the following
command on the command line:
\begin{verbatim}
$ pygmentize -L styles
\end{verbatim}

Creating your own styles is also very easy. Just follow the instructions
provided on the website.

As examples you can see a C program typeset with different styles.

\begin{Example}
\noindent
\begin{minipage}[t]{0.49\linewidth}
  \begin{pygmented}[lang=c,gobble=4,sty=murphy]
    #include<stdio.h>
    main()
    { int n;
      printf("Enter a number: ");
      scanf("%d",&n);
      if ( n%2 == 0 )
         printf("Even\n");
      else
         printf("Odd\n");
      return 0;
    }
  \end{pygmented}
\end{minipage}
\hfil
\begin{minipage}[t]{0.49\linewidth}
  \begin{pygmented}[lang=c,gobble=4,sty=trac]
    #include<stdio.h>
    main()
    { int n;
      printf("Enter a number: ");
      scanf("%d",&n);
      if ( n%2 == 0 )
         printf("Even\n");
      else
         printf("Odd\n");
      return 0;
    }
  \end{pygmented}
\end{minipage}
\end{Example}

\subsection{\texttt{font}}

The value of the option \verb|font| is typeset before the content of the
listing. Usualy it is used to specify a font to be used. See the
following example.

\begin{Example}
\begin{pygmented}[lang=scala,font=\rmfamily\scshape\large]
object bigint extends Application {
  def factorial(n: BigInt): BigInt =
    if (n == 0) 1 else n * factorial(n-1)

  val f50 = factorial(50); val f49 = factorial(49)
  println("50! = " + f50)
  println("49! = " + f49)
  println("50!/49! = " + (f50 / f49))
}
\end{pygmented}
\end{Example}

\subsection{\texttt{colback}}

The option \verb|colback| can be used to choose a background color, as
is shown in the folowing example.

\begin{Example}
\begin{pygmented}[lang=fsharp,colback=green!25]
let rec factorial n =
    if n = 0
    then 1
    else n * factorial (n - 1)
System.Console.WriteLine(factorial anInt)
\end{pygmented}
\end{Example}


\subsection{\texttt{gobble}}

The option \verb|gobble| specifies the number of characters to suppress
at the beginning of each line (up to a maximum of 9). This is mainly
useful when environments are indented (Default: empty — no character
suppressed).

\begin{Example}
A code snippet inside a minipage:
\begin{minipage}[t]{.5\linewidth}
    \begin{pygmented}[lang=d,gobble=8]
        ulong fact(ulong n)
        {
          if(n < 2)
            return 1;
          else
            return n * fact(n - 1);
        }
      \end{pygmented}
\end{minipage}
\end{Example}


\subsection{\texttt{tabsize}}

The option \verb|tabsize| specifies the number of of spaces given by a
tab character (Default: 8).

\begin{Verbatim}[showtabs,tabsize=1]
\begin{pygmented}[lang=common-lisp,tabsize=4]
;; Triple the value of a number
(defun triple	(X)
	"Compute three times X."
	(* 3 X))
\end{pygmented}
\end{Verbatim}

\begin{pygmented}[lang=common-lisp,tabsize=4]
;; Triple the value of a number
(defun triple	(X)
	"Compute three times X."
	(* 3 X))
\end{pygmented}


\subsection{\texttt{linenos}, \texttt{linenostart}, \texttt{linenostep}, \texttt{linenosep}}

The lines of a listing can be numbered. The followig options control
numbering of lines.
\begin{itemize}
  \item Line numbering is enabled or disable with the \verb|linenos|
  boolean option.
  \item The number used for the first line can be set with the option
  \verb|linenostart|.
  \item The step between numbered lines can be set with the option
  \verb|linenostep|.
  \item The space between the line number and the line of the listing
  can be set with the option \verb|linenosep|.
\end{itemize}

In the followig listing you can see a Scheme function to calculate the
factorial of a number.

\begin{Example}
\begin{pygmented}[lang=scheme,linenos,linenostart=1001,linenostep=2,linenosep=5mm]
;; Building a list of squares from 0 to 9.
;; Note: loop is simply an arbitrary symbol used as
;; a label. Any symbol will do.

(define (list-of-squares n)
  (let loop ((i n) (res '()))
    (if (< i 0)
        res
        (loop (- i 1) (cons (* i i) res)))))
\end{pygmented}
\end{Example}

\subsection{\texttt{caption} and \texttt{label}}

The option \verb|caption| can be used to set a caption for the listing.
The option \verb|label| allows the assignment of a label to the listing.

Here is an example:

\begin{Example}
\begin{pygmented}[lang=c++,label=lst:test,caption=A \textbf{C++} example]
// This program adds two numbers and prints their sum.
#include <iostream>
int main()
{
  int a;
  int b;
  int sum;
  sum = a + b;
  std::cout << "The sum of " << a << " and " << b
            << " is " << sum << "\n";
  return 0;
}
\end{pygmented}
\end{Example}

\begin{Example}
  Listing \ref{lst:test} is a C++ program.
\end{Example}

\subsection{\texttt{texcomments}, \texttt{mathescape} and \texttt{escapeinside}}

The option \verb|texcomments|, if set to \texttt{true}, enables \LaTeX{}
comment lines. That is, LaTex markup in comment tokens is not escaped
so that \LaTeX{} can render it.

The \verb|mathescape|, if set to \texttt{true}, enables \LaTeX{} math
mode escape in comments. That is, \verb|$...$| inside a comment will
trigger math mode.

The option \verb|escapeinside|, if set to a string of length two,
enables escaping to \LaTeX{}. Text delimited by these two characters
is read as \LaTeX{} code and typeset accordingly. It has no effect in
string literals. It has no effect in comments if \verb|texcomments| or
\verb|mathescape| is set.

Some examples follows.

\begin{Example}
\begin{pygmented}[lang=c++,texcomments]
#include <iostream>
using namespace std;
main()
{
   cout << "Hello World";  // prints \underline{Hello World}
   return 0;
}
\end{pygmented}
\end{Example}

\begin{Example}
\begin{pygmented}[lang=python,mathescape]
# Returns $\sum_{i=1}^{n}i$
def sum_from_one_to(n):
    r = range(1, n + 1)
    return sum(r)
\end{pygmented}
\end{Example}

\begin{Example}
\begin{pygmented}[lang=c,escapeinside=||]

if (|\textit{condition}|)
    |\textit{command$_1$}|
else
    |\textit{command$_2$}|
\end{pygmented}
\end{Example}


\subsection{\texttt{inline method} and \texttt{boxing method}}

After being prettified by Pygments, the listings are enclosed in a
command (for \verb|\pyginline|) or in an environment (for
\verb|pygmented| and \verb|inputpygmented|). By default
\verb|\pyginline| uses the command \verb|\efbox| from the \texttt{efbox}
package, and \verb|pygmented| and \verb|inputpygmented| use the
environment \verb|mdframed| from the \texttt{mdframed} package.

The enclosing command or environment should be configurable using a list
of key-value pairs written between square brackets.

The enclosing command for
\verb|\pyginline| can be changed with the option
\verb|inline method|. For instance, in the following the command
\verb|\tcbox| from the \verb|tcolorbox| package is used:

\begin{Example}
  In the previous Java program,
  \pyginline[lang=java,inline method=tcbox]|"Factorial of "| is a
  literal string.
\end{Example}

The enclosing environment for \verb|pygmented| and
\verb|inputpygmented| can be changed with the option
\verb|boxing method|. For instance, here is a hello world program in
C\#, enclosed in a \verb|tcolorbox| environment:

\begin{Example}
\begin{pygmented}[lang=csharp,boxing method=tcolorbox]
using System;
class Program
{
    public static void Main(string[] args)
    {
        Console.WriteLine("Hello, world!");
    }
}
\end{pygmented}
\end{Example}

Any option unknown to Pygmen\TeX{} are passed to the enclosing command
or environment.

For instance:

\begin{Example}
\begin{pygmented}[lang=xml,boxing method=tcolorbox,colframe=red,boxrule=2mm]
<!-- This is a note -->
<note>
   <to>Tove</to>
   <from>Jani</from>
   <heading>Reminder</heading>
   <body>Don't forget me this weekend!</body>
</note>
\end{pygmented}
\end{Example}

\section{Setting global options for Pygmen\TeX{}}

Global options can be setting using the \verb|setpygmented| command.
See the examples that follows.

\begin{Example}
\setpygmented{lang=haskell, colback=red!30, font=\ttfamily\small}

\begin{pygmented}[]
sum :: Num a => [a] -> a
sum [] = 0
sum (x:xs) = x + sum xs
\end{pygmented}
\end{Example}

\begin{Example}
\begin{pygmented}[colback=blue!20, boxing method=tcolorbox]
elem :: Eq a => a -> [a] -> Bool
elem _ [] = False
elem x (y:ys) = x == y || elem x ys
\end{pygmented}
\end{Example}

\begin{Example}
\setpygmented{lang=snobol}

\begin{pygmented}[]
          OUTPUT = "What is your name?"
          Username = INPUT
          OUTPUT = "Thank you, " Username
END
\end{pygmented}
\end{Example}

\begin{Example}
\setpygmented{test/.style={colback=yellow!33,boxing method=tcolorbox,colframe=blue}}

\begin{pygmented}[test, lang=vbnet]
Module Module1
    Sub Main()
        Console.WriteLine("Hello, world!")
    End Sub
End Module
\end{pygmented}
\end{Example}

\begin{Example}
\begin{pygmented}[lang=tcl]
puts "Hello, world!"
\end{pygmented}
\end{Example}

\section{More examples of inline code snippets}

\begin{Example}
  An inline source code snippet:
  \pyginline[lang=c]|const double alfa = 3.14159;|.
  This is a C declaration with initialization.
\end{Example}

\begin{Example}
  \pyginline[lang=prolog,colback=yellow]=avo(A,B) :- pai(A,X), pai(X,B).=
  is a Prolog clause. Its head is
  \pyginline[lang=prolog,sty=emacs,colback=yellow,linecolor=red]=avo(A,B)=
  and its body is
  \pyginline[lang=prolog,sty=vim,colback=black,hidealllines]=pai(A,X), pai(X,B)=.
\end{Example}

\begin{Example}
  See the identifier \pyginline[inline method=efbox,colback=green!25]|variable|,
  which names something. String literals in C looks like
  \pyginline[lang=c,inline method=tcbox,colback=blue!20,boxrule=2pt]|"hello, world!\n"|.
\end{Example}

\setpygmented{colback=shadecolor}

\begin{Example}
  This one
  \pyginline[lang=ocaml,font=\ttfamily\scriptsize,topline=false]:let x = [1;2;3] in length x:
  is an OCaml expression with local bindings. With OCaml one can do
  imperative, functional and object oriented programming.
\end{Example}

\begin{Example}
  Now some Java code:
  \pyginline[lang=java,sty=colorful,font=\ttfamily\itshape,linewidth=1pt]|public int f(double x)|.
  This is a method header.
\end{Example}

\section{More examples of displayed code snippets}

\setpygmented{lang=scheme,colback=shadecolor,sty=emacs}

In listing \ref{lst:fact} you can see a function definition in the
Scheme language. This function computes the factorial of a natural
number.
\newline\rule{\linewidth}{2pt}
\begin{pygmented}[
  sty=emacs,
  linenos,
  label=lst:fact,
  caption=A Scheme function.
  ]
(define fact
    (lambda (n)
        (if (= n 0)
            1
            (* n (fact (- n 1))))))
\end{pygmented}

Here you have some more code to further testing the package. Listing
\ref{lst:haskell} is a Haskell program. When run this program interacts
with the user asking the user name, reading a line input by the user,
and showing a greeting message to the user.

\inputpygmented[%
  lang=haskell,
  linenos,
  linenostart=79831,
  innerlinecolor=yellow, innerlinewidth=6pt,
  middlelinecolor=blue, middlelinewidth=10pt,
  outerlinecolor=green, outerlinewidth=12pt,
  roundcorner=4,
  colback=shadecolor,
  caption=A haskell interactive program,
  label=lst:haskell,
  ]{pygmentex_demo.hs}

This is a rule:

\noindent\rule{\linewidth}{2pt}

Now a Pascal procedure:

\inputpygmented[
  lang=delphi,
  linewidth=1.5pt,
  font=\ttfamily\sffamily\large,
  colback=yellow
  ]{pygmentex_demo.delphi}
and a Pascal program
\inputpygmented[lang=pascal,linenos,linenostart=5801]{pygmentex_demo.pas}

A Python code snippet:

\inputpygmented[
  lang=python,
  sty=emacs,
  linenos,
  linenostep=3,
  linewidth=1pt,
  colback=lightgreen
  ]{pygmentex_demo.py}

\section{Using code snippets in environments}

The following is a \textbf{description} environment.

\begin{description}
  \item[An item] \lipsum[31]
  \begin{pygmented}[lang=scala,colback=yellow,
    % title=Item A
    ]
def qsort(xs: List[Int]): List[Int] =
  xs match {
    case Nil =>
      Nil
    case pivot :: tail =>
      qsort(tail filter { _ < pivot }) :::
        pivot :: qsort(tail filter { _ >= pivot })
  }
  \end{pygmented}
  \lipsum[32]

  \item[Another item] \lipsum[33]
  \begin{pygmented}[lang=lua,colback=yellow]
function entry0 (o)
  N=N + 1
  local title = o.title or '(no title)'
  fwrite('<LI><A HREF="#%d">%s</A>\n', N, title)
end
  \end{pygmented}
  \lipsum[34]
\end{description}

\section{A long program}

Here you can read the source code for a hand written lexical analyser
for the \emph{straight-line} programming language that I have developed
in Java.

\inputpygmented[boxing method=mdframed,lang=java,sty=autumn,colback=red!8,font=\ttfamily\small,tabsize=2,frametitle=\emph{Ad hoc} lexical analyser]{pygmentex_demo.java}

\section{Some fancy examples using \texttt{tcolorbox}}

The followig example uses \texttt{tcolorbox} to typeset the code
listing.

\newcounter{example}
\newlength{\examlen}
\colorlet{colexam}{red!75!black}

\begin{pygmented}[boxing method=tcolorbox,lang=scala,
  title=Example \arabic{example}: hello from \texttt{Scala},
  code={\refstepcounter{example}%
        \settowidth{\examlen}{\Large\bfseries Example \arabic{example}}},%
  coltitle=colexam,fonttitle=\Large\bfseries,
  enhanced,breakable,
  before=\par\medskip,
  parbox=false,
  frame hidden,interior hidden,segmentation hidden,
  boxsep=0pt,left=0pt,right=3mm,toptitle=2mm,pad at break=0mm,
  overlay unbroken={\draw[colexam,line width=1pt] (frame.north west)
    --([xshift=-0.5pt]frame.north east)--([xshift=-0.5pt]frame.south east)
    --(frame.south west);
    \draw[colexam,line width=2pt] ([yshift=0.5pt]frame.north west)
    -- +(\examlen,0pt);},
  overlay first={\draw[colexam,line width=1pt] (frame.north west)
    --([xshift=-0.5pt]frame.north east)--([xshift=-0.5pt]frame.south east);
    \draw[red!75!black,line width=2pt] ([yshift=0.5pt]frame.north west)
    -- +(\examlen,0pt);},
  overlay middle={\draw[colexam,line width=1pt] ([xshift=-0.5pt]frame.north east)
    --([xshift=-0.5pt]frame.south east); },
  overlay last={\draw[colexam,line width=1pt] ([xshift=-0.5pt]frame.north east)
    --([xshift=-0.5pt]frame.south east)--(frame.south west);}%
  ]
object HelloWorld extends App {
  println("Hello, world!")
}\end{pygmented}

\begin{pygmented}[boxing method=tcolorbox,lang=java,
  enhanced,colback=blue!10!white,colframe=orange,top=4mm,
  enlarge top by=\baselineskip/2+1mm,
  enlarge top at break by=0mm,pad at break=2mm,
  fontupper=\normalsize,
  overlay unbroken and first={%
    \node[rectangle,rounded corners,draw=black,fill=blue!20!white,
    inner sep=1mm,anchor=west,font=\small]
    at ([xshift=4.5mm]frame.north west) {\strut\textbf{My fancy title}};},
  ]
public class Hello {
  public static void main(String[] args) {
    System.out.println("Hello, world!")
  }
}
\end{pygmented}

\begin{pygmented}[boxing method=tcolorbox,lang=haskell,
  enhanced,sharp corners=uphill,
  colback=blue!25!white,colframe=blue!25!black,coltext=blue!90!black,
  fontupper=\Large\bfseries,arc=6mm,boxrule=2mm,boxsep=5mm,
  borderline={0.3mm}{0.3mm}{white}
  ]
module Main (main) where

main :: IO ()
main = putStrLn "Hello, world!"
\end{pygmented}

\begin{pygmented}[boxing method=tcolorbox,lang=c++,
  enhanced,frame style image=blueshade.png,
  opacityback=0.75,opacitybacktitle=0.25,
  colback=blue!5!white,colframe=blue!75!black,
  title=My title
  ]
#include <iostream>
using namespace std;
int main(int argc, char** argv) {
  cout << "Hello, world!" << endl;
  return 0;
}
\end{pygmented}

\begin{pygmented}[boxing method=tcolorbox,lang=d,
  enhanced,attach boxed title to top center={yshift=-3mm,yshifttext=-1mm},
  colback=blue!5!white,colframe=blue!75!black,colbacktitle=red!80!black,
  title=My title,fonttitle=\bfseries,
  boxed title style={size=small,colframe=red!50!black}
  ]
/* This program prints a
   hello world message
   to the console.  */

import std.stdio;

void main()
{
    writeln("Hello, World!");
}
\end{pygmented}


\section{Some fancy examples using \texttt{mdframed}}

The followig example uses \texttt{mdframed} to typeset the code listing.

\global\mdfdefinestyle{exampledefault}{%
  linecolor=red,linewidth=3pt,%
  leftmargin=1cm,rightmargin=1cm
}

\begin{pygmented}[boxing method=mdframed,lang=ada,style=exampledefault]
with Ada.Text_IO;

procedure Hello_World is
 use Ada.Text_IO;
begin
    Put_Line("Hello, world!");
end;
\end{pygmented}

\global\mdfapptodefinestyle{exampledefault}{%
  topline=false,bottomline=false,
}

\begin{pygmented}[boxing method=mdframed,lang=pascal,style=exampledefault,frametitle={Saying \emph{hello} from Pascal}]
program HelloWorld;

begin
  WriteLn('Hello, world!');
end.
\end{pygmented}

\global\mdfdefinestyle{separateheader}{%
  frametitle={%
    \tikz[baseline=(current bounding box.east),outer sep=0pt]
    \node[anchor=east,rectangle,fill=blue!20]
    {\strut Saying \emph{hello} in Modula-2};},
  innertopmargin=10pt,linecolor=blue!20,%
  linewidth=2pt,topline=true,
  frametitleaboveskip=\dimexpr-\ht\strutbox\relax,
  frametitlerule=false,
  backgroundcolor=white,
}

\begin{pygmented}[boxing method=mdframed,lang=modula2,style=separateheader]
MODULE Hello;
FROM STextIO IMPORT WriteString;
BEGIN
  WriteString("Hello World!");
END Hello.
\end{pygmented}


\tikzset{titregris/.style =
     {draw=gray, thick, fill=white, shading = exersicetitle, %
      text=gray, rectangle, rounded corners, right,minimum height=.7cm}}
\pgfdeclarehorizontalshading{exersicebackground}{100bp}
          {color(0bp)=(green!40); color(100bp)=(black!5)}
\pgfdeclarehorizontalshading{exersicetitle}{100bp}
          {color(0bp)=(red!40);color(100bp)=(black!5)}
\newcounter{exercise}
\renewcommand*\theexercise{Exercise~n\arabic{exercise}}
\makeatletter
\def\mdf@@exercisepoints{}%new mdframed key:
\define@key{mdf}{exercisepoints}{%
    \def\mdf@@exercisepoints{#1}
}
\mdfdefinestyle{exercisestyle}{%
  outerlinewidth=1em,outerlinecolor=white,%
  leftmargin=-1em,rightmargin=-1em,%
  middlelinewidth=1.2pt,roundcorner=5pt,linecolor=gray,
  apptotikzsetting={\tikzset{mdfbackground/.append style ={%
                       shading = exersicebackground}}},
  innertopmargin=1.2\baselineskip,
  skipabove={\dimexpr0.5\baselineskip+\topskip\relax},
  skipbelow={-1em},
  needspace=3\baselineskip,
  frametitlefont=\sffamily\bfseries,
  settings={\global\stepcounter{exercise}},
  singleextra={%
      \node[titregris,xshift=1cm] at (P-|O) %
         {~\mdf@frametitlefont{\theexercise}\hbox{~}};
      \ifdefempty{\mdf@@exercisepoints}%
      {}%
      {\node[titregris,left,xshift=-1cm] at (P)%
        {~\mdf@frametitlefont{\mdf@@exercisepoints points}\hbox{~}};}%
   },
  firstextra={%
      \node[titregris,xshift=1cm] at (P-|O) %
         {~\mdf@frametitlefont{\theexercise}\hbox{~}};
      \ifdefempty{\mdf@@exercisepoints}%
      {}%
      {\node[titregris,left,xshift=-1cm] at (P)%
        {~\mdf@frametitlefont{\mdf@@exercisepoints points}\hbox{~}};}%
   },
}
\makeatother

\begin{pygmented}[boxing method=mdframed,lang=go,style=exercisestyle]
// hello world in 'go'
package main

import "fmt"

func main() {
   fmt.Println("Hello, world!")
}
\end{pygmented}

\begin{pygmented}[boxing method=mdframed,lang=objective-c,style=exercisestyle,exercisepoints=10]
/* hello from objective-c */

#import <stdio.h>
#import <Foundation/Foundation.h>

int main(void)
{
    NSLog(@"Hello, world!\n");
    return 0;
}
\end{pygmented}

\mdfdefinestyle{another}{%
  linecolor=red,middlelinewidth=2pt,%
  frametitlerule=true,%
  apptotikzsetting={\tikzset{mdfframetitlebackground/.append style={%
        shade,left color=white, right color=blue!20}}},
  frametitlerulecolor=green!60,
  frametitlerulewidth=1pt,
  innertopmargin=\topskip,
}

\begin{pygmented}[boxing method=mdframed,lang=c,style=another,frametitle={Hello from C}]
#include <stdio.h>
int main(int argc, char **argv) {
  printf("Hello, world!\n");
  return 0;
}
\end{pygmented}

\section{Debugging}
Paths given to \verb|\inputpygmented| should be relative to the top level project
directory, not to the file that contains the command (if that file is in a
subdirectory).  Pygmen\TeX generates only a single top-level \texttt{.snippets} file,
and paths are not munged to account for code in subdirectories.

\section{Conclusion}

That is all.

\end{document}