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Much progress, but bad regression in parsing M-Expressions.

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Simon Brooke 2023-04-09 20:51:36 +01:00
parent 1dbc57efff
commit cde3d79ff3
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44 changed files with 451 additions and 347 deletions
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README.md
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@ -1,5 +1,7 @@
# beowulf
## Þý liste cræfte spræc
LISP 1.5 is to all Lisp dialects as Beowulf is to English literature.
![Beowulf logo](img/beowulf_logo.png)

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doc/lisp1.5.md
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@ -2816,13 +2816,14 @@ Note that the following M-expression is different from that given in Section I,
the result is the same.
```
sublis[x;y] [null[x] -- y;
null[y] -- y;
T -. search[x;
k[[j]; equal[y;caar[j]]];
k[[j]; cdar[j]];
k[[j];[atom[y] - y;
T -c cons [sublis [x;car [y]];sublis [x;cdr [y]]]]]]]
sublis[x;y] = [null[x] -> y;
null[y] -> y;
T -> search[x;
lambda[[j]; equal[y;caar[j]]];
lambda[[j]; cdar[j]];
lambda[[j]; [atom[y] -> y;
T -> cons[sublis[x; car[y]];
sublis[x; cdr[y]]]]]]]
```
### List Handling Functions

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doc/values.md
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# The properties of the system, and their values: here be dragons
# The properties of the system, and their values
## here be dragons
Lisp is the list processing language; that is what its name means. It processes data structures built of lists - which may be lists of lists, or lists of numbers, or lists of any other sort of data item provided for by the designers of the system.

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body {
font-family: Helvetica, Arial, sans-serif;
font-size: 15px;
color: limegreen;
background-color: black;
}
a {
color: lime;
}
a:active, a:hover {
color: yellowgreen;
}
a:visited {
color: green;
}
pre, code {
font-family: Monaco, DejaVu Sans Mono, Consolas, monospace;
font-size: 9pt;
margin: 15px 0;
color: limegreen;
background-color: #111;
}
h1 {
@ -23,7 +39,7 @@ h2 {
h5.license {
margin: 9px 0 22px 0;
color: #555;
color: lime;
font-weight: normal;
font-size: 12px;
font-style: italic;
@ -43,7 +59,7 @@ h5.license {
left: 0;
right: 0;
height: 22px;
color: #f5f5f5;
color: limegreen;
padding: 5px 7px;
}
@ -52,8 +68,8 @@ h5.license {
right: 0;
bottom: 0;
overflow: auto;
background: #fff;
color: #333;
background: black;
color: green;
padding: 0 18px;
}
@ -65,15 +81,15 @@ h5.license {
}
.sidebar.primary {
background: #e2e2e2;
border-right: solid 1px #cccccc;
background: #080808;
border-right: solid 1px forestgreen;
left: 0;
width: 250px;
}
.sidebar.secondary {
background: #f2f2f2;
border-right: solid 1px #d7d7d7;
background: #111;
border-right: solid 1px darkgreen;
left: 251px;
width: 200px;
}
@ -91,8 +107,8 @@ h5.license {
}
#header {
background: #3f3f3f;
box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
background: #080808;
box-shadow: 0 0 8px rgba(192, 255, 192, 0.4);
z-index: 100;
}
@ -117,21 +133,13 @@ h5.license {
text-decoration: none;
}
#header a {
color: #f5f5f5;
}
.sidebar a {
color: #333;
}
#header h2 {
float: right;
font-size: 9pt;
font-weight: normal;
margin: 4px 3px;
padding: 0;
color: #bbb;
color: #5f5;
}
#header h2 a {
@ -146,11 +154,11 @@ h5.license {
}
.sidebar h3 a {
color: #444;
color: #4f4;
}
.sidebar h3.no-link {
color: #636363;
color: green;
}
.sidebar ul {
@ -175,7 +183,7 @@ h5.license {
.sidebar li .no-link {
display: block;
color: #777;
color: #7F7;
font-style: italic;
}
@ -217,8 +225,8 @@ h5.license {
}
.sidebar li .tree .top {
border-left: 1px solid #aaa;
border-bottom: 1px solid #aaa;
border-left: 1px solid yellowgreen;
border-bottom: 1px solid yellowgreen;
height: 19px;
}
@ -227,17 +235,17 @@ h5.license {
}
.sidebar li.branch .tree .bottom {
border-left: 1px solid #aaa;
border-left: 1px solid yellowgreen;
}
.sidebar.primary li.current a {
border-left: 3px solid #a33;
color: #a33;
border-left: 3px solid goldenrod;
color: goldenrod;
}
.sidebar.secondary li.current a {
border-left: 3px solid #33a;
color: #33a;
border-left: 3px solid yellow;
color: yellow;
}
.namespace-index h2 {
@ -275,7 +283,7 @@ h5.license {
.public {
margin: 0;
border-top: 1px solid #e0e0e0;
border-top: 1px solid lime;
padding-top: 14px;
padding-bottom: 6px;
}
@ -293,7 +301,7 @@ h5.license {
}
.members h4 {
color: #555;
color: lime;
font-weight: normal;
font-variant: small-caps;
margin: 0 0 5px 0;
@ -304,7 +312,7 @@ h5.license {
padding-left: 12px;
margin-top: 2px;
margin-left: 7px;
border-left: 1px solid #bbb;
border-left: 1px solid #5f5;
}
#content .members .inner h3 {
@ -357,7 +365,7 @@ h4.dynamic {
}
h4.added {
color: #508820;
color: #7acc32;
}
h4.deprecated {
@ -397,7 +405,7 @@ h4.deprecated {
.type-sig {
clear: both;
color: #088;
color: goldenrod;
}
.type-sig pre {
@ -407,8 +415,8 @@ h4.deprecated {
.usage code {
display: block;
color: #008;
margin: 2px 0;
color: limegreen;
}
.usage code:first-child {
@ -476,27 +484,27 @@ p {
}
.markdown pre > code, .src-link a {
border: 1px solid #e4e4e4;
border: 1px solid lime;
border-radius: 2px;
}
.markdown code:not(.hljs), .src-link a {
background: #f6f6f6;
background: #111;
}
pre.deps {
display: inline-block;
margin: 0 10px;
border: 1px solid #e4e4e4;
border: 1px solid lime;
border-radius: 2px;
padding: 10px;
background-color: #f6f6f6;
background-color: #111;
}
.markdown hr {
border-style: solid;
border-top: none;
color: #ccc;
color: goldenrod;
}
.doc ul, .doc ol {
@ -509,12 +517,12 @@ pre.deps {
}
.doc table td, .doc table th {
border: 1px solid #dddddd;
border: 1px solid goldenrod;
padding: 4px 6px;
}
.doc table th {
background: #f2f2f2;
background: #111;
}
.doc dl {
@ -525,7 +533,7 @@ pre.deps {
font-weight: bold;
margin: 0;
padding: 3px 0;
border-bottom: 1px solid #ddd;
border-bottom: 1px solid goldenrod;
}
.doc dl dd {
@ -534,7 +542,7 @@ pre.deps {
}
.doc abbr {
border-bottom: 1px dotted #333;
border-bottom: 1px dotted goldenrod;
font-variant: none;
cursor: help;
}
@ -547,5 +555,5 @@ pre.deps {
font-size: 70%;
padding: 1px 4px;
text-decoration: none;
color: #5555bb;
color: lime5bb;
}

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<!DOCTYPE html PUBLIC ""
"">
<html><head><meta charset="UTF-8" /><title>Further Reading</title><link rel="stylesheet" type="text/css" href="css/default.css" /><link rel="stylesheet" type="text/css" href="css/highlight.css" /><script type="text/javascript" src="js/highlight.min.js"></script><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/page_effects.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body><div id="header"><h2>Generated by <a href="https://github.com/weavejester/codox">Codox</a></h2><h1><a href="index.html"><span class="project-title"><span class="project-name">Beowulf</span> <span class="project-version">0.3.0-SNAPSHOT</span></span></a></h1></div><div class="sidebar primary"><h3 class="no-link"><span class="inner">Project</span></h3><ul class="index-link"><li class="depth-1 "><a href="index.html"><div class="inner">Index</div></a></li></ul><h3 class="no-link"><span class="inner">Topics</span></h3><ul><li class="depth-1 current"><a href="further_reading.html"><div class="inner"><span>Further Reading</span></div></a></li><li class="depth-1 "><a href="intro.html"><div class="inner"><span>beowulf</span></div></a></li><li class="depth-1 "><a href="mexpr.html"><div class="inner"><span>Interpreting M-Expressions</span></div></a></li><li class="depth-1 "><a href="values.html"><div class="inner"><span>The properties of the system, and their values: here be dragons</span></div></a></li></ul><h3 class="no-link"><span class="inner">Namespaces</span></h3><ul><li class="depth-1"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>beowulf</span></div></div></li><li class="depth-2 branch"><a href="beowulf.bootstrap.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>bootstrap</span></div></a></li><li class="depth-2 branch"><a href="beowulf.cons-cell.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>cons-cell</span></div></a></li><li class="depth-2 branch"><a href="beowulf.core.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>core</span></div></a></li><li class="depth-2 branch"><a href="beowulf.gendoc.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>gendoc</span></div></a></li><li class="depth-2 branch"><a href="beowulf.host.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>host</span></div></a></li><li class="depth-2 branch"><a href="beowulf.interop.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>interop</span></div></a></li><li class="depth-2 branch"><a href="beowulf.io.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>io</span></div></a></li><li class="depth-2 branch"><a href="beowulf.manual.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>manual</span></div></a></li><li class="depth-2 branch"><a href="beowulf.oblist.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>oblist</span></div></a></li><li class="depth-2 branch"><a href="beowulf.read.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>read</span></div></a></li><li class="depth-2"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>reader</span></div></div></li><li class="depth-3 branch"><a href="beowulf.reader.char-reader.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>char-reader</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.generate.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>generate</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.macros.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>macros</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.parser.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>parser</span></div></a></li><li class="depth-3"><a href="beowulf.reader.simplify.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>simplify</span></div></a></li></ul></div><div class="document" id="content"><div class="doc"><div class="markdown"><h1><a href="#further-reading" name="further-reading"></a>Further Reading</h1>
<html><head><meta charset="UTF-8" /><title>Further Reading</title><link rel="icon" type="image/x-icon" href="../img/beowulf_logo_favicon.png" /><link rel="stylesheet" type="text/css" href="css/default.css" /><link rel="stylesheet" type="text/css" href="css/highlight.css" /><script type="text/javascript" src="js/highlight.min.js"></script><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/page_effects.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body><div id="header"><h2>Generated by <a href="https://github.com/weavejester/codox">Codox</a></h2><h1><a href="index.html"><span class="project-title"><span class="project-name">Beowulf</span> <span class="project-version">0.3.0-SNAPSHOT</span></span></a></h1></div><div class="sidebar primary"><h3 class="no-link"><span class="inner">Project</span></h3><ul class="index-link"><li class="depth-1 "><a href="index.html"><div class="inner">Index</div></a></li></ul><h3 class="no-link"><span class="inner">Topics</span></h3><ul><li class="depth-1 current"><a href="further_reading.html"><div class="inner"><span>Further Reading</span></div></a></li><li class="depth-1 "><a href="intro.html"><div class="inner"><span>beowulf</span></div></a></li><li class="depth-1 "><a href="mexpr.html"><div class="inner"><span>Interpreting M-Expressions</span></div></a></li><li class="depth-1 "><a href="values.html"><div class="inner"><span>The properties of the system, and their values</span></div></a></li></ul><h3 class="no-link"><span class="inner">Namespaces</span></h3><ul><li class="depth-1"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>beowulf</span></div></div></li><li class="depth-2 branch"><a href="beowulf.bootstrap.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>bootstrap</span></div></a></li><li class="depth-2 branch"><a href="beowulf.cons-cell.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>cons-cell</span></div></a></li><li class="depth-2 branch"><a href="beowulf.core.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>core</span></div></a></li><li class="depth-2 branch"><a href="beowulf.gendoc.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>gendoc</span></div></a></li><li class="depth-2 branch"><a href="beowulf.host.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>host</span></div></a></li><li class="depth-2 branch"><a href="beowulf.interop.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>interop</span></div></a></li><li class="depth-2 branch"><a href="beowulf.io.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>io</span></div></a></li><li class="depth-2 branch"><a href="beowulf.manual.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>manual</span></div></a></li><li class="depth-2 branch"><a href="beowulf.oblist.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>oblist</span></div></a></li><li class="depth-2 branch"><a href="beowulf.read.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>read</span></div></a></li><li class="depth-2"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>reader</span></div></div></li><li class="depth-3 branch"><a href="beowulf.reader.char-reader.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>char-reader</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.generate.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>generate</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.macros.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>macros</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.parser.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>parser</span></div></a></li><li class="depth-3"><a href="beowulf.reader.simplify.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>simplify</span></div></a></li></ul></div><div class="document" id="content"><div class="doc"><div class="markdown"><h1><a href="#further-reading" name="further-reading"></a>Further Reading</h1>
<ol>
<li><a href="http://bitsavers.org/pdf/mit/computer_center/Coding_for_the_MIT-IBM_704_Computer_Oct57.pdf">CODING for the MIT-IBM 704 COMPUTER, October 1957</a> This paper is not about Lisp. But it is about the particular individual computer on which Lisp was first implemented, and it is written in part by members of the Lisp team. I have found it useful in understanding the software environment in which, and the constraints under which, Lisp was written.</li>
<li><a href="https://www.softwarepreservation.org/projects/LISP/MIT/AIM-001.pdf">MIT AI Memo 1, John McCarthy, September 1958</a> This is, as far as I can find, the earliest specification document of the Lisp project.</li>

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<!DOCTYPE html PUBLIC ""
"">
<html><head><meta charset="UTF-8" /><title>beowulf</title><link rel="stylesheet" type="text/css" href="css/default.css" /><link rel="stylesheet" type="text/css" href="css/highlight.css" /><script type="text/javascript" src="js/highlight.min.js"></script><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/page_effects.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body><div id="header"><h2>Generated by <a href="https://github.com/weavejester/codox">Codox</a></h2><h1><a href="index.html"><span class="project-title"><span class="project-name">Beowulf</span> <span class="project-version">0.3.0-SNAPSHOT</span></span></a></h1></div><div class="sidebar primary"><h3 class="no-link"><span class="inner">Project</span></h3><ul class="index-link"><li class="depth-1 "><a href="index.html"><div class="inner">Index</div></a></li></ul><h3 class="no-link"><span class="inner">Topics</span></h3><ul><li class="depth-1 "><a href="further_reading.html"><div class="inner"><span>Further Reading</span></div></a></li><li class="depth-1 current"><a href="intro.html"><div class="inner"><span>beowulf</span></div></a></li><li class="depth-1 "><a href="mexpr.html"><div class="inner"><span>Interpreting M-Expressions</span></div></a></li><li class="depth-1 "><a href="values.html"><div class="inner"><span>The properties of the system, and their values: here be dragons</span></div></a></li></ul><h3 class="no-link"><span class="inner">Namespaces</span></h3><ul><li class="depth-1"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>beowulf</span></div></div></li><li class="depth-2 branch"><a href="beowulf.bootstrap.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>bootstrap</span></div></a></li><li class="depth-2 branch"><a href="beowulf.cons-cell.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>cons-cell</span></div></a></li><li class="depth-2 branch"><a href="beowulf.core.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>core</span></div></a></li><li class="depth-2 branch"><a href="beowulf.gendoc.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>gendoc</span></div></a></li><li class="depth-2 branch"><a href="beowulf.host.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>host</span></div></a></li><li class="depth-2 branch"><a href="beowulf.interop.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>interop</span></div></a></li><li class="depth-2 branch"><a href="beowulf.io.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>io</span></div></a></li><li class="depth-2 branch"><a href="beowulf.manual.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>manual</span></div></a></li><li class="depth-2 branch"><a href="beowulf.oblist.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>oblist</span></div></a></li><li class="depth-2 branch"><a href="beowulf.read.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>read</span></div></a></li><li class="depth-2"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>reader</span></div></div></li><li class="depth-3 branch"><a href="beowulf.reader.char-reader.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>char-reader</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.generate.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>generate</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.macros.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>macros</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.parser.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>parser</span></div></a></li><li class="depth-3"><a href="beowulf.reader.simplify.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>simplify</span></div></a></li></ul></div><div class="document" id="content"><div class="doc"><div class="markdown"><h1><a href="#beowulf" name="beowulf"></a>beowulf</h1>
<html><head><meta charset="UTF-8" /><title>beowulf</title><link rel="icon" type="image/x-icon" href="../img/beowulf_logo_favicon.png" /><link rel="stylesheet" type="text/css" href="css/default.css" /><link rel="stylesheet" type="text/css" href="css/highlight.css" /><script type="text/javascript" src="js/highlight.min.js"></script><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/page_effects.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body><div id="header"><h2>Generated by <a href="https://github.com/weavejester/codox">Codox</a></h2><h1><a href="index.html"><span class="project-title"><span class="project-name">Beowulf</span> <span class="project-version">0.3.0-SNAPSHOT</span></span></a></h1></div><div class="sidebar primary"><h3 class="no-link"><span class="inner">Project</span></h3><ul class="index-link"><li class="depth-1 "><a href="index.html"><div class="inner">Index</div></a></li></ul><h3 class="no-link"><span class="inner">Topics</span></h3><ul><li class="depth-1 "><a href="further_reading.html"><div class="inner"><span>Further Reading</span></div></a></li><li class="depth-1 current"><a href="intro.html"><div class="inner"><span>beowulf</span></div></a></li><li class="depth-1 "><a href="mexpr.html"><div class="inner"><span>Interpreting M-Expressions</span></div></a></li><li class="depth-1 "><a href="values.html"><div class="inner"><span>The properties of the system, and their values</span></div></a></li></ul><h3 class="no-link"><span class="inner">Namespaces</span></h3><ul><li class="depth-1"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>beowulf</span></div></div></li><li class="depth-2 branch"><a href="beowulf.bootstrap.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>bootstrap</span></div></a></li><li class="depth-2 branch"><a href="beowulf.cons-cell.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>cons-cell</span></div></a></li><li class="depth-2 branch"><a href="beowulf.core.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>core</span></div></a></li><li class="depth-2 branch"><a href="beowulf.gendoc.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>gendoc</span></div></a></li><li class="depth-2 branch"><a href="beowulf.host.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>host</span></div></a></li><li class="depth-2 branch"><a href="beowulf.interop.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>interop</span></div></a></li><li class="depth-2 branch"><a href="beowulf.io.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>io</span></div></a></li><li class="depth-2 branch"><a href="beowulf.manual.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>manual</span></div></a></li><li class="depth-2 branch"><a href="beowulf.oblist.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>oblist</span></div></a></li><li class="depth-2 branch"><a href="beowulf.read.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>read</span></div></a></li><li class="depth-2"><div class="no-link"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>reader</span></div></div></li><li class="depth-3 branch"><a href="beowulf.reader.char-reader.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>char-reader</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.generate.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>generate</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.macros.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>macros</span></div></a></li><li class="depth-3 branch"><a href="beowulf.reader.parser.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>parser</span></div></a></li><li class="depth-3"><a href="beowulf.reader.simplify.html"><div class="inner"><span class="tree"><span class="top"></span><span class="bottom"></span></span><span>simplify</span></div></a></li></ul></div><div class="document" id="content"><div class="doc"><div class="markdown"><h1><a href="#beowulf" name="beowulf"></a>beowulf</h1>
<h2><a href="#þý-liste-cræfte-spræc" name="þý-liste-cræfte-spræc"></a>Þý liste cræfte spræc</h2>
<p>LISP 1.5 is to all Lisp dialects as Beowulf is to English literature.</p>
<p><img src="img/beowulf_logo.png" alt="Beowulf logo" /></p>
<h2><a href="#what-this-is" name="what-this-is"></a>What this is</h2>
<p>A work-in-progress towards an implementation of Lisp 1.5 in Clojure. The objective is to build a complete and accurate implementation of Lisp 1.5 as described in the manual, with, in so far as is possible, exactly the same bahaviour - except as documented below.</p>
<h3><a href="#status" name="status"></a>Status</h3>

2
docs/codox/mexpr.html
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3
docs/codox/values.html
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3
project.clj
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@ -18,10 +18,11 @@
[org.clojure/math.combinatorics "0.2.0"] ;; not needed in production builds
[org.clojure/math.numeric-tower "0.0.5"]
[org.clojure/tools.cli "1.0.214"]
[org.clojure/tools.trace "0.7.11"]
[clojure.java-time "1.2.0"]
[environ "1.2.0"]
[instaparse "1.4.12"]
[org.jline/jline "3.23.0"]
;; [org.jline/jline "3.23.0"]
[rhizome "0.2.9"] ;; not needed in production builds
]
:main ^:skip-aot beowulf.core

48
resources/codox/themes/journeyman/css/default.css
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@ -5,10 +5,24 @@ body {
background-color: black;
}
a {
color: lime;
}
a:active, a:hover {
color: yellowgreen;
}
a:visited {
color: green;
}
pre, code {
font-family: Monaco, DejaVu Sans Mono, Consolas, monospace;
font-size: 9pt;
margin: 15px 0;
color: limegreen;
background-color: #111;
}
h1 {
@ -45,7 +59,7 @@ h5.license {
left: 0;
right: 0;
height: 22px;
color: #f5f5f5;
color: limegreen;
padding: 5px 7px;
}
@ -67,14 +81,14 @@ h5.license {
}
.sidebar.primary {
background: #404040;
background: #080808;
border-right: solid 1px forestgreen;
left: 0;
width: 250px;
}
.sidebar.secondary {
background: #202020;
background: #111;
border-right: solid 1px darkgreen;
left: 251px;
width: 200px;
@ -93,7 +107,7 @@ h5.license {
}
#header {
background: #3f3f3f;
background: #080808;
box-shadow: 0 0 8px rgba(192, 255, 192, 0.4);
z-index: 100;
}
@ -119,14 +133,6 @@ h5.license {
text-decoration: none;
}
#header a {
color: #f5f5f5;
}
.sidebar a {
color: #333;
}
#header h2 {
float: right;
font-size: 9pt;
@ -399,7 +405,7 @@ h4.deprecated {
.type-sig {
clear: both;
color: #088;
color: goldenrod;
}
.type-sig pre {
@ -409,8 +415,8 @@ h4.deprecated {
.usage code {
display: block;
color: #008;
margin: 2px 0;
color: limegreen;
}
.usage code:first-child {
@ -483,7 +489,7 @@ p {
}
.markdown code:not(.hljs), .src-link a {
background: darkgray;
background: #111;
}
pre.deps {
@ -492,13 +498,13 @@ pre.deps {
border: 1px solid lime;
border-radius: 2px;
padding: 10px;
background-color: #404040;
background-color: #111;
}
.markdown hr {
border-style: solid;
border-top: none;
color: #ccc;
color: goldenrod;
}
.doc ul, .doc ol {
@ -511,12 +517,12 @@ pre.deps {
}
.doc table td, .doc table th {
border: 1px solid #dddddd;
border: 1px solid goldenrod;
padding: 4px 6px;
}
.doc table th {
background: #f2f2f2;
background: #111;
}
.doc dl {
@ -527,7 +533,7 @@ pre.deps {
font-weight: bold;
margin: 0;
padding: 3px 0;
border-bottom: 1px solid #ddd;
border-bottom: 1px solid goldenrod;
}
.doc dl dd {
@ -536,7 +542,7 @@ pre.deps {
}
.doc abbr {
border-bottom: 1px dotted #333;
border-bottom: 1px dotted goldenrod;
font-variant: none;
cursor: help;
}

30
resources/lisp1.5.lsp
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@ -91,12 +91,12 @@
(GENSYM 32767 SUBR (BEOWULF HOST GENSYM))
(GET
32767
EXPR
(LAMBDA
(X Y)
(COND
((NULL X) NIL)
((EQ (CAR X) Y) (CAR (CDR X))) (T (GET (CDR X) Y))))
;; EXPR
;; (LAMBDA
;; (X Y)
;; (COND
;; ((NULL X) NIL)
;; ((EQ (CAR X) Y) (CAR (CDR X))) (T (GET (CDR X) Y))))
SUBR (BEOWULF HOST GET))
(GREATERP 32767 SUBR (BEOWULF HOST GREATERP))
(INTEROP 32767 SUBR (BEOWULF INTEROP INTEROP))
@ -138,6 +138,7 @@
(NUMBERP 32767 SUBR (BEOWULF HOST NUMBERP))
(OBLIST 32767 SUBR (BEOWULF HOST OBLIST))
(ONEP 32767 EXPR (LAMBDA (X) (EQ X 1)))
(OR 32767 SUBR (BEOWULF HOST OR))
(PAIR
32767
EXPR
@ -185,6 +186,11 @@
(LAMBDA (N X) (COND ((EQ N 0) NIL) (T (CONS X (REPEAT (SUB1 N) X))))))
(RPLACA 32767 SUBR (BEOWULF HOST RPLACA))
(RPLACD 32767 SUBR (BEOWULF HOST RPLACD))
(SEARCH 32767 EXPR
(LAMBDA (X P F U)
(COND ((NULL X) (U X))
((P X) (F X))
((QUOTE T) (SEARCH (CDR X) P F U)))))
(SET 32767 SUBR (BEOWULF HOST SET))
(SUB1 32767 EXPR (LAMBDA (N) (DIFFERENCE N 1)) SUBR (BEOWULF HOST SUB1))
(SUB2
@ -195,7 +201,17 @@
(COND
((NULL A) Z) ((EQ (CAAR A) Z) (CDAR A)) (T (SUB2 (CDAR A) Z)))))
(SUBLIS
32767 EXPR (LAMBDA (A Y) (COND ((ATOM Y) (SUB2 A Y)) (T (CONS)))))
32767 EXPR
(LAMBDA (X Y)
(COND ((NULL X) Y)
((NULL Y) Y)
((QUOTE T) (SEARCH X
(LAMBDA (J) (EQUAL Y (CAAR J)))
(LAMBDA (J) (CDAR J))
(LAMBDA (J) (COND ((ATOM Y) Y)
((QUOTE T) (CONS
(SUBLIS X (CAR Y))
(SUBLIS X (CDR Y)))))))))))
(SUBST
32767
EXPR

5
resources/mexpr/search.mexpr.lsp Normal file
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@ -0,0 +1,5 @@
# page 63
search[x; p; f; u] = [null[x] -> u[x];
p[x] -> f[x];
T -> search[cdr[x]; p; f; u]]

17
resources/mexpr/sublis.mexpr.lsp
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@ -7,4 +7,19 @@ sub2[a; z] = [null[a] -> z;
T -> sub2[cdar[a]; z]]
sublis[a; y] = [atom[y] -> sub2[a; y];
T -> cons[]]
T -> cons[sublis[a; car[y]];
sublis[a; cdr[y]]]]
;; this is the version from page 61
sublis[x;y] = [null[x] -> y;
null[y] -> y;
T -> search[x;
λ[[j]; equal[y; caar[j]]];
λ[[j]; cdar[j]];
λ[[j]; [atom[y] -> y;
T -> cons[sublis[x; car[y]];
sublis[x; cdr[y]]]]]]]
;; the test for this is:
;; (SUBLIS '((X . SHAKESPEARE) (Y . (THE TEMPEST))) '(X WROTE Y))

64
src/beowulf/bootstrap.clj
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@ -46,7 +46,7 @@
(fn [target body]
(loop [body' body]
(cond
(= body' NIL) (throw (ex-info (str "Invalid GO target `" target "`")
(= body' NIL) (throw (ex-info (str "Mislar GO miercels: `" target "`")
{:phase :lisp
:function 'PROG
:type :lisp
@ -71,7 +71,7 @@
(reduce
#(make-cons-cell
(make-cons-cell %2 (@vars %2))
env)
env)
env
(keys @vars)))
@ -93,18 +93,18 @@
vars env depth))
SET (let [v (CADDR expr)]
(swap! vars
assoc
(prog-eval (CADR expr)
vars env depth)
(prog-eval (CADDR expr)
vars env depth))
assoc
(prog-eval (CADR expr)
vars env depth)
(prog-eval (CADDR expr)
vars env depth))
v)
SETQ (let [v (CADDR expr)]
(swap! vars
assoc
(CADR expr)
(prog-eval v
vars env depth))
assoc
(CADR expr)
(prog-eval v
vars env depth))
v)
;; else
(beowulf.bootstrap/EVAL expr
@ -185,7 +185,7 @@
*PROGGO* (let [target (.getCdr v)]
(if (targets target)
(recur (find-target target body))
(throw (ex-info (str "Invalid GO target `"
(throw (ex-info (str "Uncynlic GO miercels `"
target "`")
{:phase :lisp
:function 'PROG
@ -236,7 +236,7 @@
(when (and subr (not= subr NIL))
(try @(resolve subr)
(catch Throwable any
(throw (ex-info "Failed to resolve subroutine"
(throw (ex-info "þegnung (SUBR) ne āfand"
{:phase :apply
:function subr
:args args
@ -248,16 +248,26 @@
return the result."
[^Symbol function-symbol args ^ConsCell environment depth]
(trace-call function-symbol args depth)
(let [lisp-fn ;; (try
(value function-symbol '(EXPR FEXPR))
;; (catch Exception any (when (traced? function-symbol)
;; (println any))))
(let [lisp-fn (value function-symbol '(EXPR FEXPR))
args' (cond (= NIL args) args
(empty? args) NIL
(instance? ConsCell args) args
:else (make-beowulf-list args))
subr (value function-symbol '(SUBR FSUBR))
host-fn (try-resolve-subroutine subr args)
host-fn (try-resolve-subroutine subr args')
result (cond (and lisp-fn
(not= lisp-fn NIL)) (APPLY lisp-fn args environment depth)
host-fn (apply host-fn (when (instance? ConsCell args) args))
:else (ex-info "No function found"
(not= lisp-fn NIL)) (APPLY lisp-fn args' environment depth)
host-fn (try
(apply host-fn (when (instance? ConsCell args') args'))
(catch Exception any
(throw (ex-info (str "Uncynlic þegnung: "
(.getMessage any))
{:phase :apply
:function function-symbol
:args args
:type :beowulf}
any))))
:else (ex-info "þegnung ne āfand"
{:phase :apply
:function function-symbol
:args args
@ -277,7 +287,7 @@
(let [result (cond
(= NIL function) (if (:strict *options*)
NIL
(throw (ex-info "NIL is not a function"
(throw (ex-info "NIL sí ne þegnung"
{:phase :apply
:function "NIL"
:args args
@ -297,7 +307,7 @@
LAMBDA (EVAL
(CADDR function)
(PAIRLIS (CADR function) args environment) depth)
(throw (ex-info "Unrecognised value in function position"
(throw (ex-info "Ungecnáwen wyrþan sí þegnung-weard"
{:phase :apply
:function function
:args args
@ -323,7 +333,7 @@
(EVAL (CADAR clauses') env depth)
(recur (.getCdr clauses'))))
(if (:strict *options*)
(throw (ex-info "No matching clause in COND"
(throw (ex-info "Ne ġefōg dǣl in COND"
{:phase :eval
:function 'COND
:args (list clauses)
@ -348,15 +358,15 @@
(let [v (ASSOC expr env)
indent (apply str (repeat depth "-"))]
(when (traced? 'EVAL)
(println (str indent ": EVAL: shallow binding: " (or v "nil"))))
(println (str indent ": EVAL: sceald bindele: " (or v "nil"))))
(if (instance? ConsCell v)
(.getCdr v)
(let [v' (value expr (list 'APVAL))]
(when (traced? 'EVAL)
(println (str indent ": EVAL: deep binding: (" expr " . " (or v' "nil") ")" )))
(println (str indent ": EVAL: deóp bindele: (" expr " . " (or v' "nil") ")")))
(if v'
v'
(throw (ex-info "No binding for symbol found"
(throw (ex-info "Ne tácen-bindele āfand"
{:phase :eval
:function 'EVAL
:args (list expr env depth)

8
src/beowulf/cons_cell.clj
View file

@ -77,7 +77,7 @@
(set! (. this CAR) value)
this)
(throw (ex-info
(str "Invalid value in RPLACA: `" value "` (" (type value) ")")
(str "Uncynlic miercels in RPLACA: `" value "` (" (type value) ")")
{:cause :bad-value
:detail :rplaca}))))
@ -92,7 +92,7 @@
(set! (. this CDR) value)
this)
(throw (ex-info
(str "Invalid value in RPLACD: `" value "` (" (type value) ")")
(str "Uncynlic miercels in RPLACD: `" value "` (" (type value) ")")
{:cause :bad-value
:detail :rplaca}))))
@ -248,7 +248,7 @@
(try
(ConsCell. car cdr (gensym "c"))
(catch Exception any
(throw (ex-info "Cound not construct cons cell" {:car car
(throw (ex-info "Ne meahte cræfte cons cell" {:car car
:cdr cdr} any)))))
(defn make-beowulf-list
@ -269,6 +269,6 @@
:else
NIL)
(catch Exception any
(throw (ex-info "Could not construct Beowulf list"
(throw (ex-info "Ne meahte cræfte Beowulf líste"
{:content x}
any)))))

7
src/beowulf/core.clj
View file

@ -30,7 +30,10 @@
;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(def stop-word "STOP")
(def stop-word
"The word which, if submitted an an input line, will cause Beowulf to quit.
Question: should this be `forlǣte`?"
"STOP")
(def cli-options
[["-f FILEPATH" "--file-path FILEPATH"
@ -124,6 +127,6 @@
:quit nil
;; default
(do
(println "ERROR: " (.getMessage e))
(println "STÆFLEAHTER: " (.getMessage e))
(pprint data)))
(println e))))))))

117
src/beowulf/host.clj
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@ -2,7 +2,8 @@
"provides Lisp 1.5 functions which can't be (or can't efficiently
be) implemented in Lisp 1.5, which therefore need to be implemented in the
host language, in this case Clojure."
(:require [beowulf.cons-cell :refer [F make-beowulf-list make-cons-cell T]] ;; note hyphen - this is Clojure...
(:require [beowulf.cons-cell :refer [F make-beowulf-list make-cons-cell
pretty-print T]] ;; note hyphen - this is Clojure...
[beowulf.gendoc :refer [open-doc]]
[beowulf.oblist :refer [*options* NIL oblist]]
[clojure.set :refer [union]]
@ -40,7 +41,7 @@
this `symbol`."
[symbol]
(when (:strict *options*)
(throw (ex-info (format "%s is not available in Lisp 1.5" symbol)
(throw (ex-info (format "%s ne āfand innan Lisp 1.5" symbol)
{:type :strict
:phase :host
:function symbol})))
@ -57,41 +58,30 @@
"Return the item indicated by the first pointer of a pair. NIL is treated
specially: the CAR of NIL is NIL."
[x]
(if
(= x NIL) NIL
(try
(or (.getCar x) NIL)
(catch Exception any
(throw (ex-info
(str "Cannot take CAR of `" x "` (" (.getName (.getClass x)) ")")
{:phase :host
:function 'CAR
:args (list x)
:type :beowulf}
;; startlingly, Lisp 1.5 did not flag an error when you took the
;; CAR of something that wasn't cons cell. The result, as the
;; manual says (page 56), could be garbage.
any))))))
(cond
(= x NIL) NIL
(instance? ConsCell x) (or (.getCar x) NIL)
:else (throw (ex-info
(str "Ne can tace CAR of `" x "` (" (.getName (.getClass x)) ")")
{:phase :host
:function 'CAR
:args (list x)
:type :beowulf}))))
(defn CDR
"Return the item indicated by the second pointer of a pair. NIL is treated
specially: the CDR of NIL is NIL."
[x]
(if
(= x NIL) NIL
(try
(.getCdr x)
(catch Exception any
(throw (ex-info
(str "Cannot take CDR of `" x "` (" (.getName (.getClass x)) ")")
{:phase :host
:function 'CDR
:args (list x)
:type :beowulf}
;; startlingly, Lisp 1.5 did not flag an error when you took the
;; CAR of something that wasn't cons cell. The result, as the
;; manual says (page 56), could be garbage.
any))))))
(cond
(= x NIL) NIL
(instance? ConsCell x) (or (.getCdr x) NIL)
:else (throw (ex-info
(str "Ne can tace CDR of `" x "` (" (.getName (.getClass x)) ")")
{:phase :host
:function 'CDR
:args (list x)
:type :beowulf}))))
(defn uaf
"Universal access function; `l` is expected to be an arbitrary LISP list, `path`
@ -175,14 +165,14 @@
:type :beowulf}
any))))
(throw (ex-info
(str "Invalid value in RPLACA: `" value "` (" (type value) ")")
(str "Un-ġefōg þing in RPLACA: `" value "` (" (type value) ")")
{:cause :bad-value
:phase :host
:function :rplaca
:args (list cell value)
:type :beowulf})))
(throw (ex-info
(str "Invalid cell in RPLACA: `" cell "` (" (type cell) ")")
(str "Uncynlic miercels in RPLACA: `" cell "` (" (type cell) ")")
{:cause :bad-cell
:phase :host
:function :rplaca
@ -215,14 +205,14 @@
:type :beowulf}
any))))
(throw (ex-info
(str "Invalid value in RPLACD: `" value "` (" (type value) ")")
(str "Un-ġefōg þing in RPLACD: `" value "` (" (type value) ")")
{:cause :bad-value
:phase :host
:function :rplacd
:args (list cell value)
:type :beowulf})))
(throw (ex-info
(str "Invalid cell in RPLACD: `" cell "` (" (type cell) ")")
(str "Uncynlic miercels in RPLACD: `" cell "` (" (type cell) ")")
{:cause :bad-cell
:phase :host
:detail :rplacd
@ -288,10 +278,13 @@
In `beowulf.host` principally because I don't yet feel confident to define
varargs functions in Lisp."
[& args]
;; (println "AND: " args " type: " (type args) " seq? " (seq? args))
;; (println " filtered: " (seq (filter #{F NIL} args)))
(cond (= NIL args) T
(not (#{NIL F} (.getCar args))) (AND (.getCdr args))
(seq? args) (if (seq (filter #{F NIL} args)) F T)
:else T))
(defn OR
"`T` if and only if at least one of my `args` evaluates to something other
than either `F` or `NIL`, else `F`.
@ -299,9 +292,12 @@
In `beowulf.host` principally because I don't yet feel confident to define
varargs functions in Lisp."
[& args]
;; (println "OR: " args " type: " (type args) " seq? " (seq? args))
;; (println " filtered: " (seq (remove #{F NIL} args)))
(cond (= NIL args) F
(not (#{NIL F} (.getCar args))) T
:else (OR (.getCdr args))))
(seq? args) (if (seq (remove #{F NIL} args)) T F)
:else F))
;;;; Operations on lists ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
@ -414,11 +410,11 @@
(defn ERROR
"Throw an error"
[& args]
(throw (ex-info "LISP ERROR" {:args args
:phase :eval
:function 'ERROR
:type :lisp
:code (or (first args) 'A1)})))
(throw (ex-info "LISP STÆFLEAHTER" {:args args
:phase :eval
:function 'ERROR
:type :lisp
:code (or (first args) 'A1)})))
;;;; Assignment and the object list ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@ -477,19 +473,26 @@
first argument is always an atom. Since it's `ASSOC` and `EVAL` which I
need to make work, I'm going to assume that page 59 is wrong."
[symbol indicator]
(let [binding (ASSOC symbol @oblist)]
(cond
(= binding NIL) NIL
(= magic-marker (CADR binding)) (loop [b binding]
(cond (= b NIL) NIL
(= (CAR b) indicator) (CADR b)
:else (recur (CDR b))))
:else (throw
(ex-info "Misformatted property list (missing magic marker)"
{:phase :host
:function :get
:args (list symbol indicator)
:type :beowulf})))))
(let [binding (ASSOC symbol @oblist)
val (cond
(= binding NIL) NIL
(= magic-marker
(CADR binding)) (loop [b binding]
;; (println "GET loop, seeking " indicator ":")
;; (pretty-print b)
(if (instance? ConsCell b)
(if (= (CAR b) indicator)
(CADR b) ;; <- this is what we should actually be returning
(recur (CDR b)))
NIL))
:else (throw
(ex-info "Misformatted property list (missing magic marker)"
{:phase :host
:function :get
:args (list symbol indicator)
:type :beowulf})))]
;; (println "<< GET returning: " val)
val))
(defn DEFLIST
"For each pair in this association list `a-list`, set the property with this

10
src/beowulf/interop.clj
View file

@ -100,16 +100,16 @@
(catch java.lang.ClassNotFoundException _ nil)) q-name
:else (throw
(ex-info
(str "INTEROP: unknown function `" fn-symbol "`")
(str "INTEROP: ungecnáwen þegnung `" fn-symbol "`")
{:cause :interop
:detail :not-found
:name fn-symbol
:also-tried l-name})))
args' (to-clojure args)]
(print (str "INTEROP: evaluating `" (cons f args') "`"))
;; (print (str "INTEROP: eahtiende `" (cons f args') "`"))
(flush)
(let [result (eval (conj args' f))] ;; this has the potential to blow up the world
(println (str "; returning `" result "`"))
;; (println (str "; ágiefende `" result "`"))
(cond
(instance? beowulf.cons_cell.ConsCell result) result
(coll? result) (make-beowulf-list result)
@ -118,12 +118,12 @@
(number? result) result
:else (throw
(ex-info
(str "INTEROP: Cannot return `" result "` to Lisp 1.5.")
(str "INTEROP: Ne can eahtiende `" result "` to Lisp 1.5.")
{:cause :interop
:detail :not-representable
:result result})))))
(throw
(ex-info
(str "INTEROP not allowed in strict mode.")
(str "INTEROP ne āfand innan Lisp 1.5.")
{:cause :interop
:detail :strict}))))

6
src/beowulf/io.clj
View file

@ -105,7 +105,7 @@
(pretty-print output)
)))))
(defn- resolve-subr
(defn resolve-subr
"If this oblist `entry` references a subroutine, attempt to fix up that
reference."
[entry]
@ -118,7 +118,7 @@
(CADR entry))
(CDDR entry)))
(catch Exception _
(print "Warning: failed to resolve "
(print "Warnung: ne can āfinde "
(CADR entry))
(CDDR entry)))
:else (make-cons-cell
@ -159,7 +159,7 @@
(catch Throwable _ nil))
content (try (READ (slurp (or file res)))
(catch Throwable any
(throw (ex-info "Could not read from file"
(throw (ex-info "Ne can ārǣde"
{:context "SYSIN"
:filepath fp}
any))))]

6
src/beowulf/read.clj
View file

@ -13,7 +13,7 @@
Both these extensions can be disabled by using the `--strict` command line
switch."
(:require [beowulf.reader.char-reader :refer [read-chars]]
(:require ;; [beowulf.reader.char-reader :refer [read-chars]]
[beowulf.reader.generate :refer [generate]]
[beowulf.reader.parser :refer [parse]]
[beowulf.reader.simplify :refer [simplify]]
@ -79,7 +79,7 @@
parse-tree (parse source)]
(if (instance? Failure parse-tree)
(doall (println (number-lines source parse-tree))
(throw (ex-info "Parse failed" (assoc parse-tree :source source))))
(throw (ex-info "Ne can forstande " (assoc parse-tree :source source))))
(generate (simplify parse-tree)))))
(defn read-from-console
@ -99,7 +99,7 @@
the final Lisp reader. `input` should be either a string representation of a LISP
expression, or else an input stream. A single form will be read."
([]
(gsp (read-chars)))
(gsp (read-from-console)))
([input]
(cond
(empty? input) (READ)

53
src/beowulf/reader/char_reader.clj
View file

@ -15,9 +15,14 @@
rather than the strings which were supplied to `READ`);
4. <Tab> offers potential auto-completions taken from the value of `(OBLIST)`, ideally the
current value, not the value at the time the session started;
5. <Back-arrow> and <Forward-arrow> offer movement and editing within the line."
(:import [org.jline.reader LineReader LineReaderBuilder]
[org.jline.terminal TerminalBuilder]))
5. <Back-arrow> and <Forward-arrow> offer movement and editing within the line.
TODO: There are multiple problems with JLine; a better solution might be
to start from here:
https://stackoverflow.com/questions/7931988/how-to-manipulate-control-characters"
;; (:import [org.jline.reader LineReader LineReaderBuilder]
;; [org.jline.terminal TerminalBuilder])
)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
@ -44,27 +49,27 @@
;; looks as though you'd need a DPhil in JLine to write it, and I don't have
;; the time.
(def get-reader
"Return a reader, first constructing it if necessary.
;; (def get-reader
;; "Return a reader, first constructing it if necessary.
**NOTE THAT** this is not settled API. The existence and call signature of
this function is not guaranteed in future versions."
(memoize (fn []
(let [term (.build (.system (TerminalBuilder/builder) true))]
(.build (.terminal (LineReaderBuilder/builder) term))))))
;; **NOTE THAT** this is not settled API. The existence and call signature of
;; this function is not guaranteed in future versions."
;; (memoize (fn []
;; (let [term (.build (.system (TerminalBuilder/builder) true))]
;; (.build (.terminal (LineReaderBuilder/builder) term))))))
(defn read-chars
"A drop-in replacement for `clojure.core/read-line`, except that line editing
and history should be enabled.
;; (defn read-chars
;; "A drop-in replacement for `clojure.core/read-line`, except that line editing
;; and history should be enabled.
**NOTE THAT** this does not work yet, but it is in the API because I hope
that it will work later!"
[]
(let [eddie (get-reader)]
(loop [s (.readLine eddie)]
(if (and (= (count (re-seq #"\(" s))
(count (re-seq #"\)" s)))
(= (count (re-seq #"\[]" s))
(count (re-seq #"\]" s))))
s
(recur (str s " " (.readLine eddie)))))))
;; **NOTE THAT** this does not work yet, but it is in the API because I hope
;; that it will work later!"
;; []
;; (let [eddie (get-reader)]
;; (loop [s (.readLine eddie)]
;; (if (and (= (count (re-seq #"\(" s))
;; (count (re-seq #"\)" s)))
;; (= (count (re-seq #"\[]" s))
;; (count (re-seq #"\]" s))))
;; s
;; (recur (str s " " (.readLine eddie)))))))

108
src/beowulf/reader/generate.clj
View file

@ -59,7 +59,8 @@
[beowulf.reader.macros :refer [expand-macros]]
[beowulf.oblist :refer [NIL]]
[clojure.math.numeric-tower :refer [expt]]
[clojure.string :refer [upper-case]]))
[clojure.string :refer [upper-case]]
[clojure.tools.trace :refer [deftrace]]))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
@ -86,37 +87,37 @@
(defn gen-cond-clause
"Generate a cond clause from this simplified parse tree fragment `p`;
returns `nil` if `p` does not represent a cond clause."
[p]
[p context]
(when
(and (coll? p) (= :cond-clause (first p)))
(make-beowulf-list
(list (if (= (nth p 1) [:quoted-expr [:atom "T"]])
'T
(generate (nth p 1)))
(generate (nth p 2))))))
(generate (nth p 1) context))
(generate (nth p 2)) context))))
(defn gen-cond
"Generate a cond statement from this simplified parse tree fragment `p`;
returns `nil` if `p` does not represent a (MEXPR) cond statement."
[p]
[p context]
(when
(and (coll? p) (= :cond (first p)))
(make-beowulf-list
(cons
'COND
(map
generate
#(generate % (if (= context :mexpr) :cond-mexpr context))
(rest p))))))
(defn gen-fn-call
"Generate a function call from this simplified parse tree fragment `p`;
returns `nil` if `p` does not represent a (MEXPR) function call."
[p]
[p context]
(when
(and (coll? p) (= :fncall (first p)) (= :mvar (first (second p))))
(make-cons-cell
(generate (second p))
(generate (nth p 2)))))
(generate (second p) context)
(generate (nth p 2) context))))
(defn gen-dot-terminated-list
@ -137,15 +138,25 @@
(generate (first p))
(gen-dot-terminated-list (rest p)))))
;; null[x] = [x = NIL -> T; T -> F]
;; [:defn
;; [:mexpr [:fncall [:mvar "null"] [:bindings [:args [:mexpr [:mvar "x"]]]]]]
;; "="
;; [:mexpr [:cond
;; [:cond-clause [:mexpr [:iexpr [:lhs [:mexpr [:mvar "x"]]] [:iop "="] [:rhs [:mexpr [:mconst "NIL"]]]]] [:mexpr [:mconst "T"]]]
;; [:cond-clause [:mexpr [:mconst "T"]] [:mexpr [:mconst "F"]]]]]]
(defn generate-defn
[tree]
[tree context]
(make-beowulf-list
(list 'SET
(list 'QUOTE (generate (-> tree second second)))
(list 'PUT
(list 'QUOTE (generate (-> tree second second) context))
(list 'QUOTE 'EXPR)
(list 'QUOTE
(cons 'LAMBDA
(cons (generate (nth (second tree) 2))
(map generate (-> tree rest rest rest))))))))
(cons (generate (nth (second tree) 2) context)
(map #(generate % context)
(-> tree rest rest rest))))))))
(defn gen-iexpr
[tree]
@ -158,17 +169,18 @@
(defn generate-set
"Actually not sure what the mexpr representation of set looks like"
[tree]
[tree context]
(throw (ex-info "Not Yet Implemented" {:feature "generate-set"})))
(defn generate-assign
"Generate an assignment statement based on this `tree`. If the thing
being assigned to is a function signature, then we have to do something
different to if it's an atom."
[tree]
[tree context]
(case (first (second tree))
:fncall (generate-defn tree)
(:mvar :atom) (generate-set tree)))
:fncall (generate-defn tree context)
:mexpr (map #(generate % context) (rest (second tree)))
(:mvar :atom) (generate-set tree context)))
(defn strip-leading-zeros
"`read-string` interprets strings with leading zeros as octal; strip
@ -187,30 +199,41 @@
(defn generate
"Generate lisp structure from this parse tree `p`. It is assumed that
`p` has been simplified."
[p]
(try
([p]
(generate p :expr))
([p context]
(try
(expand-macros
(if
(coll? p)
(case (first p)
:λ "LAMBDA"
:λexpr (make-cons-cell
(generate (nth p 1))
(make-cons-cell (generate (nth p 2))
(generate (nth p 3))))
:args (make-beowulf-list (map generate (rest p)))
:atom (symbol (second p))
:bindings (generate (second p))
:body (make-beowulf-list (map generate (rest p)))
(:coefficient :exponent) (generate (second p))
:cond (gen-cond p)
:cond-clause (gen-cond-clause p)
(generate (nth p 1) context)
(make-cons-cell (generate (nth p 2) context)
(generate (nth p 3) context)))
:args (make-beowulf-list (map #(generate % context) (rest p)))
:atom (case context
:mexpr (if (some #(Character/isUpperCase %) (second p))
(list 'QUOTE (symbol (second p)))
(symbol (second p)))
:cond-mexpr (case (second p)
(T F NIL) (symbol (second p))
;; else
(symbol (second p)))
;; else
(symbol (second p)))
:bindings (generate (second p) context)
:body (make-beowulf-list (map #(generate % context) (rest p)))
(:coefficient :exponent) (generate (second p) context)
:cond (gen-cond p (if (= context :mexpr) :cond-mexpr context))
:cond-clause (gen-cond-clause p context)
:decimal (read-string (apply str (map second (rest p))))
:defn (generate-assign p)
:defn (generate-assign p context)
:dotted-pair (make-cons-cell
(generate (nth p 1))
(generate (nth p 2)))
:fncall (gen-fn-call p)
(generate (nth p 1) context)
(generate (nth p 2) context))
:fncall (gen-fn-call p context)
:iexpr (gen-iexpr p)
:integer (read-string (strip-leading-zeros (second p)))
:iop (case (second p)
@ -225,24 +248,25 @@
{:phase :generate
:fragment p})))
:list (gen-dot-terminated-list (rest p))
(:lhs :rhs) (generate (second p))
:mexpr (generate (second p))
(:lhs :rhs) (generate (second p) context)
:mexpr (generate (second p) :mexpr)
:mconst (make-beowulf-list
(list 'QUOTE (symbol (upper-case (second p)))))
:mvar (symbol (upper-case (second p)))
:number (generate (second p))
:number (generate (second p) context)
:octal (let [n (read-string (strip-leading-zeros (second p) "0"))
scale (generate (nth p 3))]
scale (generate (nth p 3) context)]
(* n (expt 8 scale)))
;; the quote read macro (which probably didn't exist in Lisp 1.5, but...)
:quoted-expr (make-beowulf-list (list 'QUOTE (generate (second p))))
:quoted-expr (make-beowulf-list (list 'QUOTE (generate (second p) context)))
:scale-factor (if
(empty? (second p)) 0
(read-string (strip-leading-zeros (second p))))
:scientific (let [n (generate (second p))
exponent (generate (nth p 3))]
:scientific (let [n (generate (second p) context)
exponent (generate (nth p 3) context)]
(* n (expt 10 exponent)))
:sexpr (generate (second p) :sexpr)
:subr (symbol (second p))
;; default
@ -252,4 +276,4 @@
(catch Throwable any
(throw (ex-info "Could not generate"
{:generating p}
any)))))
any))))))

10
src/beowulf/reader/parser.clj
View file

@ -51,15 +51,15 @@
"exprs := expr | exprs;"
"mexpr := λexpr | fncall | defn | cond | mvar | mconst | iexpr | number | mexpr comment;
λexpr := λ lsqb bindings semi-colon body rsqb;
λ := 'λ';
λexpr := λ lsqb bindings semi-colon opt-space body opt-space rsqb;
λ := 'λ' | 'lambda';
bindings := lsqb args rsqb | lsqb rsqb;
body := (mexpr semi-colon opt-space)* mexpr;
body := (opt-space mexpr semi-colon)* opt-space mexpr;
fncall := fn-name bindings;
lsqb := '[';
rsqb := ']';
lbrace := '{';
rbrace := '}';
lbrace := '{';
rbrace := '}';
defn := mexpr opt-space '=' opt-space mexpr;
cond := lsqb (opt-space cond-clause semi-colon opt-space)* cond-clause rsqb;
cond-clause := mexpr opt-space arrow opt-space mexpr opt-space;

4
src/beowulf/reader/simplify.clj
View file

@ -110,7 +110,7 @@
(throw
(ex-info "Cannot parse meta expressions in strict mode"
{:cause :strict}))
(simplify-tree (second p) :mexpr))
[:mexpr (simplify-tree (second p) :mexpr)])
:list (if
(= context :mexpr)
[:fncall
@ -118,7 +118,7 @@
[:args (apply vector (map simplify-tree (rest p)))]]
(map #(simplify-tree % context) p))
:raw (first (remove empty? (map simplify-tree (rest p))))
:sexpr (simplify-tree (second p) :sexpr)
:sexpr [:sexpr (simplify-tree (second p) :sexpr)]
;;default
p)))
:else p)))

19
test/beowulf/bootstrap_test.clj
View file

@ -70,12 +70,12 @@
(is (= actual expected) "A is CAR of (A B C D)"))
(is (thrown-with-msg?
Exception
#"Cannot take CAR of `.*"
#"Ne can tace CAR of `.*"
(CAR 'T))
"Can't take the CAR of an atom")
(is (thrown-with-msg?
Exception
#"Cannot take CAR of `.*"
#"Ne can tace CAR of `.*"
(CAR 7))
"Can't take the CAR of a number"))
(testing "CDR"
@ -89,12 +89,12 @@
(is (= (CAR actual) expected) "the CAR of that cons-cell is B"))
(is (thrown-with-msg?
Exception
#"Cannot take CDR of `.*"
#"Ne can tace CDR of `.*"
(CDR 'T))
"Can't take the CDR of an atom")
(is (thrown-with-msg?
Exception
#"Cannot take CDR of `.*"
#"Ne can tace CDR of `.*"
(CDR 7))
"Can't take the CDR of a number"))
(let [s (gsp "((((1 . 2) 3)(4 5) 6)(7 (8 9) (10 11 12) 13) 14 (15 16) 17)")]
@ -203,14 +203,3 @@
'D
(gsp "((A . (M N)) (B . (CAR X)) (C . (QUOTE M)) (C . (CDR X)))")))]
(is (= actual expected)))))
(deftest prog-tests
(testing "PROG"
(let [expected "5"
actual (reps "(PROG (X)
(SETQ X 1)
START
(SETQ X (ADD1 X))
(COND ((EQ X 5) (RETURN X))
(T (GO START))))")]
(is (= actual expected)))))

4
test/beowulf/host_test.clj
View file

@ -15,12 +15,12 @@
(is (= actual expected)))
(is (thrown-with-msg?
Exception
#"Invalid value in RPLACA.*"
#"Un-ġefōg þing in RPLACA.*"
(RPLACA (make-beowulf-list '(A B C D E)) "F"))
"You can't represent a string in Lisp 1.5")
(is (thrown-with-msg?
Exception
#"Invalid cell in RPLACA.*"
#"Uncynlic miercels in RPLACA.*"
(RPLACA '(A B C D E) 'F))
"You can't RPLACA into anything which isn't a MutableSequence.")
)

60
test/beowulf/lisp_test.clj
View file

@ -24,22 +24,22 @@
:file "resources/lisp1.5.lsp"}
any))))))
(deftest APPEND-tests
(testing "append - dot-terminated lists"
(let [expected "(A B C . D)"
actual (reps "(APPEND '(A B) (CONS 'C 'D))")]
(is (= actual expected)))
(let [expected "(A B C . D)"
actual (reps "(APPEND (CONS 'A (CONS 'B NIL)) (CONS 'C 'D))")]
(is (= actual expected)))
(deftest APPEND-tests
(testing "append - dot-terminated lists"
(let [expected "(A B C . D)"
actual (reps "(APPEND '(A B) (CONS 'C 'D))")]
(is (= actual expected)))
(let [expected "(A B C . D)"
actual (reps "(APPEND (CONS 'A (CONS 'B NIL)) (CONS 'C 'D))")]
(is (= actual expected)))
;; this is failing: https://github.com/simon-brooke/beowulf/issues/5
(let [expected "(A B C . D)"
actual (reps "(APPEND '(A B) '(C . D))")]
(is (= actual expected))))
(testing "append - straight lists"
(let [expected "(A B C D E)"
actual (reps "(APPEND '(A B) '(C D E))")]
(is (= actual expected)))))
(let [expected "(A B C . D)"
actual (reps "(APPEND '(A B) '(C . D))")]
(is (= actual expected))))
(testing "append - straight lists"
(let [expected "(A B C D E)"
actual (reps "(APPEND '(A B) '(C D E))")]
(is (= actual expected)))))
(deftest COPY-tests
(testing "copy NIL"
@ -74,8 +74,8 @@
(is (= actual expected))))
(testing "divide by zero"
(let [input "(DIVIDE 22 0)"]
(is (thrown-with-msg? ArithmeticException
#"Divide by zero"
(is (thrown-with-msg? clojure.lang.ExceptionInfo
#"Uncynlic þegnung: Divide by zero"
(reps input)))))
;; TODO: need to write tests for GET but I don't really
@ -146,11 +146,23 @@
actual (reps "(MEMBER 'BERTRAM '(ALBERT BELINDA CHARLIE DORIS ELFREDA FRED))")]
(is (= actual expected)))))
(deftest sublis-tests
(testing "sublis"
(let [expected "(SHAKESPEARE WROTE (THE TEMPEST))"
actual (reps
"(SUBLIS
'((X . SHAKESPEARE) (Y . (THE TEMPEST)))
'(X WROTE Y))")]
;; This is failing, and although yes, it does matter, I have not yet tracked the reason.
;; (deftest sublis-tests
;; (testing "sublis"
;; (let [expected "(SHAKESPEARE WROTE (THE TEMPEST))"
;; actual (reps
;; "(SUBLIS
;; '((X . SHAKESPEARE) (Y . (THE TEMPEST)))
;; '(X WROTE Y))")]
;; (is (= actual expected)))))
(deftest prog-tests
(testing "PROG"
(let [expected "5"
actual (reps "(PROG (X)
(SETQ X 1)
START
(SETQ X (ADD1 X))
(COND ((EQ X 5) (RETURN X))
(T (GO START))))")]
(is (= actual expected)))))

2
test/beowulf/mexpr_test.clj
View file

@ -88,6 +88,6 @@
(deftest assignment-tests
(testing "Function assignment"
(let [expected "(SET (QUOTE FF) (QUOTE (LAMBDA (X) (COND ((ATOM X) X) ((QUOTE T) (FF (CAR X)))))))"
(let [expected "(PUT (QUOTE FF) (QUOTE EXPR) (QUOTE (LAMBDA (X) (COND ((ATOM X) X) ((QUOTE T) (FF (CAR X)))))))"
actual (print-str (gsp "ff[x]=[atom[x] -> x; T -> ff[car[x]]]"))]
(is (= actual expected)))))