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| author | Kartik K. Agaram <vc@akkartik.com> | 2015-07-13 20:53:41 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2015-07-13 20:53:41 -0700 |
| commit | 83fcebf3210b638d9f8248e0007e9f0c9804980a (patch) | |
| tree | 95c4855bef341e1d46eb4725b54a3eaaf6858f08 /html/047global.cc.html | |
| parent | 8b9f1750c74c7d3cca99d6949a90cd61eb8e0218 (diff) | |
| download | mu-83fcebf3210b638d9f8248e0007e9f0c9804980a.tar.gz | |
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| -rw-r--r-- | html/047global.cc.html | 113 |
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diff --git a/html/047global.cc.html b/html/047global.cc.html new file mode 100644 index 00000000..da036490 --- /dev/null +++ b/html/047global.cc.html @@ -0,0 +1,113 @@ +<!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 - 047global.cc</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v1"> +<meta name="syntax" content="cpp"> +<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; } +body { font-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 1.05em; } +.traceContains { color: #008000; } +.cSpecial { color: #008000; } +.Constant { color: #00a0a0; } +.Comment { color: #9090ff; } +.Delimiter { color: #a04060; } +.Special { color: #ff6060; } +.Identifier { color: #804000; } +.CommentedCode { color: #6c6c6c; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="Comment">// So far we have local variables, and we can nest local variables of short</span> +<span class="Comment">// lifetimes inside longer ones. Now let's support 'global' variables that</span> +<span class="Comment">// last for the life of a routine. If we create multiple routines they won't</span> +<span class="Comment">// have access to each other's globals.</span> + +<span class="Delimiter">:(scenario global_space)</span> +recipe main [ + <span class="Comment"># pretend arrays; in practice we'll use new</span> + <span class="Constant">10</span>:number<span class="Special"> <- </span>copy <span class="Constant">5</span>:literal + <span class="Constant">20</span>:number<span class="Special"> <- </span>copy <span class="Constant">5</span>:literal + <span class="Comment"># actual start of this recipe</span> + global-space:address:array:location<span class="Special"> <- </span>copy <span class="Constant">20</span>:literal + default-space:address:array:location<span class="Special"> <- </span>copy <span class="Constant">10</span>:literal + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">23</span>:literal + <span class="Constant">1</span>:number/space:global<span class="Special"> <- </span>copy <span class="Constant">24</span>:literal +] +<span class="traceContains">+mem: storing 23 in location 12</span> +<span class="traceContains">+mem: storing 24 in location 22</span> + +<span class="Comment">//: to support it, create another special variable called global space</span> +<span class="Delimiter">:(before "End Disqualified Reagents")</span> +if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"global-space"</span><span class="Delimiter">)</span> + x<span class="Delimiter">.</span>initialized = <span class="Constant">true</span><span class="Delimiter">;</span> +<span class="Delimiter">:(before "End is_special_name Cases")</span> +if <span class="Delimiter">(</span>s == <span class="Constant">"global-space"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span> + +<span class="Comment">//: writes to this variable go to a field in the current routine</span> +<span class="Delimiter">:(before "End routine Fields")</span> +long long int global_space<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End routine Constructor")</span> +global_space = <span class="Constant">0</span><span class="Delimiter">;</span> +<span class="Delimiter">:(after "void write_memory(reagent x, vector<double> data)")</span> + if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"global-space"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>data<span class="Delimiter">));</span> + if <span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>global_space<span class="Delimiter">)</span> + raise << <span class="Constant">"routine already has a global-space; you can't over-write your globals"</span><span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></span>global_space = data<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span> + <span class="Identifier">return</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + +<span class="Comment">//: now marking variables as /space:global looks them up inside this field</span> +<span class="Delimiter">:(after "long long int space_base(const reagent& x)")</span> + if <span class="Delimiter">(</span>is_global<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-></span>global_space<span class="Delimiter">)</span> + raise << <span class="Constant">"routine has no global space</span><span class="cSpecial">\n</span><span class="Constant">"</span> << die<span class="Delimiter">();</span> + <span class="Identifier">return</span> Current_routine<span class="Delimiter">-></span>global_space<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + +<span class="Comment">//: for now let's not bother giving global variables names.</span> +<span class="Comment">//: don't want to make them too comfortable to use.</span> + +<span class="Delimiter">:(scenario global_space_with_names)</span> +<span class="Special">% Hide_warnings = true;</span> +recipe main [ + global-space:address:array:location<span class="Special"> <- </span>new location:type<span class="Delimiter">,</span> <span class="Constant">10</span>:literal + x:number<span class="Special"> <- </span>copy <span class="Constant">23</span>:literal + <span class="Constant">1</span>:number/space:global<span class="Special"> <- </span>copy <span class="Constant">24</span>:literal +] +<span class="Comment"># don't warn that we're mixing numeric addresses and names</span> +$warn: <span class="Constant">0</span> + +<span class="Delimiter">:(after "bool is_numeric_location(const reagent& x)")</span> + if <span class="Delimiter">(</span>is_global<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> + +<span class="Comment">//: helpers</span> + +<span class="Delimiter">:(code)</span> +bool is_global<span class="Delimiter">(</span>const reagent& x<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span class="CommentedCode">//? cerr << x.to_string() << '\n'; //? 1</span> + for <span class="Delimiter">(</span>long long int i = <span class="Comment">/*</span><span class="Comment">skip name:type</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>x<span class="Delimiter">.</span>properties<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first == <span class="Constant">"space"</span><span class="Delimiter">)</span> + <span class="Identifier">return</span> !x<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> && x<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">"global"</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |