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Algol 68 Genie code browser

Below is a list with example Algol 68 programs, together with the cross-referenced source files of the current Algol 68 Genie version.

You can download the current version and its documentation here.

Example Algol 68 programs

File Synopsis Lines
       
1  ackermann.a68 Ackermann function, a paradigm total computable function that is not primitive recursive. 47
2  all-parser.a68 Non-left-recursive context-free grammar parser. 59
3  arithmetic-derivative.a68 Lagarias arithmetic derivate. 42
4  backtracking.a68 Split an amount of money in coins, by backtracking. 30
5  bulls-and-cows.a68 Break a unique code of `n' pegs and `m' colours you think of. 72
6  decision-tree.a68 Paradigm for building decision trees in Algol 68. 67
7  dictionary.a68 Write Python-style dictionaries in json format. 61
8  fibonacci-grammar.a68 Illustration of the use of procedure closures. 38
9  formula-manipulation.a68 Symbolic computing in Algol 68. 277
10  hamming.a68 Compute regular (or Hamming) numbers. 65
11  hilbert-curve-latex.a68 Generate LaTeX code to plot a Hilbert curve. 106
12  hilbert-matrix.a68 Compute the determinant of a Hilbert matrix using fractions. 195
13  linear-regression.a68 Ordinary Least Squares, Principal Component and Partial Least Squares regression. 149
14  lisp-interpreter.a68 Miniature LISP interpreter in Algol 68. 167
15  lucas-sequence.a68 Lucas sequence and the golden ratio. 36
16  mandelbrot-plotutils.a68 Plot a part of the Mandelbrot set. 56
17  parallel-fft.a68 Parallel Fast Fourier Transform in recursive form. 35
18  partial-parametrisation.a68 Lindsey's currying proposal for Algol 68. 31
19  pebbles.a68 Edsger Dijkstra's pebble problem. 69
20  queens.a68 'N' queens in classic backtracker. 41
21  quicksort.a68 The well-known recursive quicksort algorithm. 32
22  roman-decimal.a68 Translation between decimal and Roman notation. 60
23  tukey-test-tables.a68 Compute Studentized range q table. 57
24  van-wijngaarden-switch.a68 Van Wijngaarden's pseudo-switch. 37
25  warshall.a68 Warshall's algorithm for transitive closures. 64
26  wca.a68 Compute equilibrium Lennard Jones thermodynamic data. 141
27  www.a68 Reading web pages using Algol 68. 18
28  zeroin.a68 Zeroin is a classic root-finding algorithm. 118

Algol 68 Genie source files

File Synopsis Lines
1  a68g-apropos.c Command line help. 165
2  a68g-bits.c Miscellaneous routines. 375
3  a68g.c Algol 68 Genie main driver. 693
4  a68g-conversion.c Conversion tables for IEEE platforms. 84
5  a68g-diagnostics.c Error and warning routines. 814
6  a68g-io.c Low-level input-output routines. 273
7  a68g-keywords.c Algol 68 keyword tables. 214
8  a68g-listing.c Old-school listing file. 707
9  a68g-mem.c Low-level memory management. 261
10  a68g-non-terminal.c Non-terminal tables. 417
11  a68g-options.c Algol 68 Genie options. 1127
12  a68g-path.c Low-level file path routines. 157
13  a68g-postulates.c Postulates needed for proving equivalence of modes. 92
14  a68g-pretty.c Lay-out formatter for Algol 68. 1340
15  double.c LONG INT, LONG REAL and LONG BITS routines. 1986
16  double-gamic.c LONG REAL generalised incomplete gamma function. 416
17  double-math.c LONG REAL, LONG COMPLEX routines. 358
18  genie-assign.c Interpreter routines for assignations. 152
19  genie.c Interpreter driver. 878
20  genie-call.c Interpreter routines for procedure calls. 278
21  genie-coerce.c Interpreter mode coercion routines. 492
22  genie-declaration.c Interpreter routines for declarations. 215
23  genie-denotation.c Interpreter routines for denotations. 280
24  genie-enclosed.c Interpreter routines for enclosed clauses. 912
25  genie-formula.c Interpreter routines for formulas. 185
26  genie-hip.c Interpreter routines for jumps and SKIP. 223
27  genie-identifier.c Interpreter routines for identifiers. 91
28  genie-misc.c Miscellaneous interpreter routines. 113
29  genie-regex.c Low-level regular expression routines. 288
30  genie-rows.c Interpreter routines for ROW values. 139
31  genie-stowed.c Interpreter routines for STOWED values. 420
32  genie-unix.c Low-level UNIX routines. 845
33  moids-diagnostics.c MOID diagnostics routines. 186
34  moids-misc.c Miscellaneous MOID routines. 1196
35  moids-size.c Memory footprint (size) of a mode. 273
36  moids-to-string.c Pretty-print a MOID. 299
37  mp-bits.c [LONG] LONG BITS routines, legacy MP implementation. 654
38  mp.c [LONG] LONG INT, REAL routines. 1315
39  mp-complex.c [LONG] LONG COMPLEX math functions. 528
40  mp-gamic.c [LONG] LONG REAL generalised incomplete gamma function. 831
41  mp-gamma.c [LONG] LONG REAL error, gamma and beta functions. 498
42  mp-genie.c Multi-precision interpreter routines. 1411
43  mp-math.c [LONG] LONG REAL math functions. 1384
44  mp-mpfr.c [LONG] LONG REAL routines using GNU MPFR. 530
45  mp-pi.c [LONG] LONG REAL value of pi by AGM. 136
46  parser-bottom-up.c Hand-coded bottom-up parser for Algol 68. 2032
47  parser-brackets.c Recursive-descent parenthesis checker. 231
48  parser.c Mailloux-type Algol 68 parser driver. 985
49  parser-extract.c Extract tags from phrases. 543
50  parser-modes.c Mode table management. 1052
51  parser-moids-check.c Mode checker routines. 1746
52  parser-moids-coerce.c Mode coercion driver. 864
53  parser-moids-equivalence.c Prove equivalence of modes. 159
54  parser-refinement.c Refinement preprocessor. 238
55  parser-scanner.c Context-dependent Algol 68 tokeniser. 1542
56  parser-scope.c Static scope checker. 896
57  parser-taxes.c Symbol table management. 1411
58  parser-top-down.c Top-down parser for control structure. 681
59  parser-victal.c Syntax check for formal, actual and virtual declarers. 311
60  plugin-basic.c Plugin compiler routines. 388
61  plugin.c Plugin compiler driver. 973
62  plugin-driver.c Plugin compiler driver. 183
63  plugin-folder.c Plugin compiler constant folder. 453
64  plugin-gen.c Plugin compiler generator routines. 1806
65  plugin-inline.c Plugin compiler inlining routines. 1178
66  plugin-script.c Plugin script builder routines. 164
67  plugin-tables.c Plugin compiler tables. 536
68  prelude-bits.c Multiple precision BITS. 97
69  prelude.c Standard prelude definitions. 2258
70  prelude-gsl.c Standard prelude definitions from GSL. 662
71  prelude-mathlib.c Standard prelude definitions from GNU R math library. 137
72  rts-bool.c BOOL routines. 56
73  rts-char.c CHAR, STRING and BYTES routines. 677
74  rts-curl.c HTTP/HTTPS client. 135
75  rts-curses.c Curses interface. 227
76  rts-enquiries.c Environment enquiries. 73
77  rts-formatted.c Formatted transput. 2576
78  rts-heap.c Generator and garbage collector routines. 782
79  rts-int128.c 128-bit INT support. 282
80  rts-internal.c Transput routines. 360
81  rts-mach.c Machine parameters. 260
82  rts-monitor.c GDB-style monitor for the interpreter. 2289
83  rts-parallel.c Parallel clause implementation. 517
84  rts-plotutils.c Gnuplot's libplot interface. 1554
85  rts-postgresql.c PostgreSQL libpq interface. 815
86  rts-sounds.c SOUND routines. 603
87  rts-stowed.c Interpreter routines for STOWED values. 786
88  rts-transput.c Transput routines. 1648
89  rts-unformatted.c Unformatted transput. 2790
90  single-blas.c REAL GSL BLAS support. 60
91  single.c INT, REAL, COMPLEX and BITS routines. 1632
92  single-decomposition.c REAL GSL LU, QR and Choleski decomposition. 280
93  single-fft.c REAL, COMPLEX GSL fast fourier transform. 290
94  single-gamic.c REAL generalised incomplete gamma function. 414
95  single-gsl.c REAL GSL routines. 844
96  single-laplace.c REAL GSL laplace routines. 115
97  single-math.c REAL math routines supplementing libc. 780
98  single-multivariate.c REAL multivariate regression. 689
99  single-physics.c REAL GSL physical constants. 246
100  single-python.c REAL vector and matrix routines, Python look-a-likes. 314
101  single-r-math.c REAL GNU R math routines. 547
102  single-rnd.c REAL pseudo-random number generator. 194
103  single-svd.c REAL GSL matrix SVD decomposition. 106
104  single-torrix.c REAL vector and matrix support. 259
105  single-torrix-gsl.c REAL GSL vector and matrix routines. 1285

Algol 68 Genie include files

File Synopsis Lines
1  a68g-common.h Common definitions. 341
2  a68g-config.win32.h Default WIN32 configuration file. 124
3  a68g-defines.h General macro definitions. 660
4  a68g-diagnostics.h Macros and text strings for diagnostics. 248
5  a68g-double.h LONG REAL definitions. 451
6  a68g-enums.h Enumerated constants. 265
7  a68g-environ.h Standard prelude and postlude. 63
8  a68g-frames.h Macros for opening/closing frames. 212
9  a68g-generic.h Platform dependent definitions. 55
10  a68g-genie.h Interpreter related definitions. 465
11  a68g.h Master include file. 168
12  a68g-includes.h Common a68g includes. 294
13  a68g-level-3.h Platform dependent definitions. 80
14  a68g-lib.h Internal math routines. 129
15  a68g-listing.h Definitions for making listing files. 38
16  a68g-mach.h Machine parameters. 72
17  a68g-masks.h Bit masks. 76
18  a68g-math.h Internal math tables. 441
19  a68g-moids.h Definitions related to MOIDS. 104
20  a68g-mp.h Definitions for multiple precision modes. 577
21  a68g-nil.h Various forms of NIL. 86
22  a68g-numbers.h Math constants. 45
23  a68g-optimiser.h Definitions for the plugin compiler. 119
24  a68g-options.h Definitions for option processing. 39
25  a68g-parser.h Definitions related to the parser. 174
26  a68g-physics.h Various numerical constants from GSL. 240
27  a68g-platform.h Platform dependent definitions. 120
28  a68g-plugin.h Definitions for the plugin compiler. 207
29  a68g-postulates.h Definitions related to postulates. 35
30  a68g-prelude-gsl.h GSL definitions. 541
31  a68g-prelude.h RTS related definitions. 745
32  a68g-prelude-mathlib.h R standalone mathematics library definitions. 138
33  a68g-stack.h Macros for stack checking. 54
34  a68g-stddef.h Various standard definitions. 94
35  a68g-torrix.h REAL vector and matrix support. 84
36  a68g-transput.h Transput related definitions. 93
37  a68g-types.h Internal type definitions. 578

The number of source lines in this version is 78497.


Posts in "Algol 68"

Marcel van der Veer Algol 68
A perspective of Algol 68
March 2023

To better understand the position of Algol 68 among today’s plethora of programming languages, we should consider their development …

Marcel van der Veer Algol 68
Announcing Algol 68 Genie 3.0
December 2021

I have released the current source as version 3.0. I have also updated the documentation, Learning Algol 68 Genie …

Marcel van der Veer Algol 68
A brief history of Algol 68 Genie
November 2016

Being the author of Algol 68 Genie, people frequently ask me why a physical chemist wrote an Algol 68 compiler …

Marcel van der Veer Algol 68
Announcing Algol 68 Genie 2.0
September 2010

I have posted Algol 68 Genie Version 2.0.0 and its documentation …

Marcel van der Veer Algol 68
Revised Report on the Algorithmic Language Algol 68
June 2009

This is a translation of the Algol 68 Revised Report into HTML, for distribution with Algol 68 Genie, an Open Source Algol 68 interpreter …

Marcel van der Veer Algol 68
Announcing Algol 68 Genie 1.0
September 2002

Algol 68 was conceived as a successor to Algol 60 …


Marcel van der Veer
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jmvdveer@xs4all.nl