about summary refs log tree commit diff stats
path: root/html/055parse_tree.cc.html
blob: a9f6091de7bbaca41be0d44f20c5e62032a573d9 (plain) (blame)
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
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - 055parse_tree.cc</title>
<meta name="Generator" content="Vim/7.3">
<meta name="plugin-version" content="vim7.3_v6">
<meta name="syntax" content="cpp">
<meta name="settings" content="use_css">
<style type="text/css">
<!--
pre { font-family: monospace; color: #eeeeee; background-color: #080808; }
body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
.Identifier { color: #fcb165; }
.Normal { color: #eeeeee; background-color: #080808; }
.traceContains { color: #008000; }
.Special { color: #c00000; }
.Constant { color: #00a0a0; }
.Delimiter { color: #800080; }
.Comment { color: #9090ff; }
-->
</style>
</head>
<body>
<pre>
<span class="Comment">// So far instructions can only contain linear lists of properties. Now we add</span>
<span class="Comment">// support for more complex trees of properties in dilated reagents. This will</span>
<span class="Comment">// come in handy later for expressing complex types, like &quot;a dictionary from</span>
<span class="Comment">// (address to array of charaters) to (list of numbers)&quot;.</span>

<span class="Delimiter">:(scenario dilated_reagent_with_nested_brackets)</span>
def main [
  <span class="Delimiter">{</span><span class="Constant">1</span>: number<span class="Delimiter">,</span> foo: <span class="Delimiter">(</span>bar <span class="Delimiter">(</span>baz quux<span class="Delimiter">))}</span><span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
]
<span class="traceContains">+parse:   product: 1: &quot;number&quot;, {&quot;foo&quot;: (&quot;bar&quot; (&quot;baz&quot; &quot;quux&quot;))}</span>

<span class="Delimiter">:(before &quot;End Parsing Reagent Property(value)&quot;)</span>
value = parse_string_tree<span class="Delimiter">(</span>value<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Parsing Reagent Type Property(value)&quot;)</span>
value = parse_string_tree<span class="Delimiter">(</span>value<span class="Delimiter">);</span>

<span class="Delimiter">:(code)</span>
string_tree* parse_string_tree<span class="Delimiter">(</span>string_tree* s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>!s<span class="Delimiter">-&gt;</span>left &amp;&amp; !s<span class="Delimiter">-&gt;</span>right<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>s<span class="Delimiter">-&gt;</span>value<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != <span class="Constant">'('</span><span class="Delimiter">)</span> <span class="Identifier">return</span> s<span class="Delimiter">;</span>
  string_tree* result = parse_string_tree<span class="Delimiter">(</span>s<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
  <span class="Normal">delete</span> s<span class="Delimiter">;</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

string_tree* parse_string_tree<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  istringstream in<span class="Delimiter">(</span>s<span class="Delimiter">);</span>
  in &gt;&gt; std::noskipws<span class="Delimiter">;</span>
  <span class="Identifier">return</span> parse_string_tree<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

string_tree* parse_string_tree<span class="Delimiter">(</span>istream&amp; in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">NULL</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="Constant">')'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    in<span class="Delimiter">.</span>get<span class="Delimiter">();</span>
    <span class="Identifier">return</span> <span class="Constant">NULL</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="Constant">'('</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    string_tree* result = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>next_word<span class="Delimiter">(</span>in<span class="Delimiter">));</span>
    <span class="Identifier">return</span> result<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  in<span class="Delimiter">.</span>get<span class="Delimiter">();</span>  <span class="Comment">// skip '('</span>
  string_tree* result = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  string_tree** curr = &amp;result<span class="Delimiter">;</span>
  <span class="Normal">while</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="Constant">')'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    assert<span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">));</span>
    *curr = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span><span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
    skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="Constant">'('</span><span class="Delimiter">)</span>
      <span class="Delimiter">(</span>*curr<span class="Delimiter">)-&gt;</span>left = parse_string_tree<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
    <span class="Normal">else</span>
      <span class="Delimiter">(</span>*curr<span class="Delimiter">)-&gt;</span>value = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
    curr = &amp;<span class="Delimiter">(</span>*curr<span class="Delimiter">)-&gt;</span>right<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  in<span class="Delimiter">.</span>get<span class="Delimiter">();</span>  <span class="Comment">// skip ')'</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario dilated_reagent_with_type_tree)</span>
<span class="Special">% Hide_errors = true;  // 'map' isn't defined yet</span>
def main [
  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>foo <span class="Delimiter">(</span>address array character<span class="Delimiter">)</span> <span class="Delimiter">(</span>bar number<span class="Delimiter">))}</span><span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
]
<span class="Comment"># just to avoid errors</span>
container foo [
]
container bar [
]
<span class="traceContains">+parse:   product: 1: (&quot;foo&quot; (&quot;address&quot; &quot;array&quot; &quot;character&quot;) (&quot;bar&quot; &quot;number&quot;))</span>

<span class="Delimiter">:(scenario dilated_reagent_in_static_array)</span>
def main [
  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>array <span class="Delimiter">(</span>address shared number<span class="Delimiter">)</span> <span class="Constant">3</span><span class="Delimiter">)}</span><span class="Special"> &lt;- </span>create-array
  <span class="Constant">5</span>:address:address:shared:number<span class="Special"> &lt;- </span>index-address <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>array <span class="Delimiter">(</span>address shared number<span class="Delimiter">)</span> <span class="Constant">3</span><span class="Delimiter">)},</span> <span class="Constant">0</span>
  *<span class="Constant">5</span>:address:address:shared:number<span class="Special"> &lt;- </span><span class="Normal">new</span> number:type
  **<span class="Constant">5</span>:address:address:shared:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">6</span>:number<span class="Special"> &lt;- </span>copy **<span class="Constant">5</span>:address:address:shared:number
]
<span class="traceContains">+run: creating array of size 4</span>
<span class="traceContains">+mem: storing 34 in location 6</span>

<span class="Comment">//: an exception is 'new', which takes a type tree as its ingredient *value*</span>

<span class="Delimiter">:(scenario dilated_reagent_with_new)</span>
def main [
  x:address:shared:address:number<span class="Special"> &lt;- </span><span class="Normal">new</span> <span class="Delimiter">{(</span>address number<span class="Delimiter">)</span>: type<span class="Delimiter">}</span>
]
<span class="traceContains">+new: size of (&quot;address&quot; &quot;number&quot;) is 1</span>

<span class="Delimiter">:(before &quot;End Post-processing(expected_product) When Checking 'new'&quot;)</span>
<span class="Delimiter">{</span>
  string_tree* tmp_type_names = parse_string_tree<span class="Delimiter">(</span>expected_product<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
  <span class="Normal">delete</span> expected_product<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
  expected_product<span class="Delimiter">.</span>type = new_type_tree<span class="Delimiter">(</span>tmp_type_names<span class="Delimiter">);</span>
  <span class="Normal">delete</span> tmp_type_names<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Post-processing(type_name) When Converting 'new'&quot;)</span>
type_name = parse_string_tree<span class="Delimiter">(</span>type_name<span class="Delimiter">);</span>
</pre>
</body>
</html>