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<pre id='vimCodeElement'>
<span class="Comment">//: Spaces help isolate recipes from each other. You can create them at will,</span>
<span class="Comment">//: and all addresses in arguments are implicitly based on the 'default-space'</span>
<span class="Comment">//: (unless they have the /raw property)</span>
<span class="Comment">//: A space is just an array of any scalar location.</span>
<span class="Delimiter">:(before "End Mu Types Initialization")</span>
put<span class="Delimiter">(</span>Type_abbreviations<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">,</span> new_type_tree<span class="Delimiter">(</span><span class="Constant">"address:array:location"</span><span class="Delimiter">));</span>
<span class="Comment">//: Spaces are often called 'scopes' in other languages.</span>
put<span class="Delimiter">(</span>Type_abbreviations<span class="Delimiter">,</span> <span class="Constant">"scope"</span><span class="Delimiter">,</span> new_type_tree<span class="Delimiter">(</span><span class="Constant">"address:array:location"</span><span class="Delimiter">));</span>
<span class="Delimiter">:(scenario set_default_space)</span>
<span class="Comment"># if default-space is 10, and if an array of 5 locals lies from location 12 to 16 (inclusive),</span>
<span class="Comment"># then local 0 is really location 12, local 1 is really location 13, and so on.</span>
def main [
<span class="Comment"># pretend address:array:location; in practice we'll use new</span>
<span class="Constant">10</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># refcount</span>
<span class="Constant">11</span>:num<span class="Special"> <- </span>copy <span class="Constant">5</span> <span class="Comment"># length</span>
<span class="Normal">default</span>-space:space<span class="Special"> <- </span>copy <span class="Constant">10</span>/unsafe
<span class="Constant">1</span>:num<span class="Special"> <- </span>copy <span class="Constant">23</span>
]
<span class="traceContains">+mem: storing 23 in location 13</span>
<span class="Delimiter">:(scenario lookup_sidesteps_default_space)</span>
def main [
<span class="Comment"># pretend pointer from outside (2000 reserved for refcount)</span>
<span class="Constant">2001</span>:num<span class="Special"> <- </span>copy <span class="Constant">34</span>
<span class="Comment"># pretend address:array:location; in practice we'll use new</span>
<span class="Constant">1000</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># refcount</span>
<span class="Constant">1001</span>:num<span class="Special"> <- </span>copy <span class="Constant">5</span> <span class="Comment"># length</span>
<span class="Comment"># actual start of this recipe</span>
<span class="Normal">default</span>-space:space<span class="Special"> <- </span>copy <span class="Constant">1000</span>/unsafe
<span class="Constant">1</span>:&:num<span class="Special"> <- </span>copy <span class="Constant">2000</span>/unsafe <span class="Comment"># even local variables always contain raw addresses</span>
<span class="Constant">8</span>:num/<span class="Special">raw <- </span>copy *<span class="Constant">1</span>:&:num
]
<span class="traceContains">+mem: storing 34 in location 8</span>
<span class="SalientComment">//:: first disable name conversion for 'default-space'</span>
<span class="Delimiter">:(scenario convert_names_passes_default_space)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Normal">default</span>-space:num<span class="Delimiter">,</span> x:num<span class="Special"> <- </span>copy <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">1</span>
]
<span class="traceContains">+name: assign x 1</span>
<span class="traceAbsent">-name: assign default-space 1</span>
<span class="Delimiter">:(before "End is_disqualified Cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"default-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>
<span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">"default-space"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="SalientComment">//:: now implement space support</span>
<span class="Delimiter">:(before "End call Fields")</span>
<span class="Normal">int</span> default_space<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End call Constructor")</span>
default_space = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End canonize(x) Special-cases")</span>
absolutize<span class="Delimiter">(</span>x<span class="Delimiter">);</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> absolutize<span class="Delimiter">(</span>reagent& x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_raw<span class="Delimiter">(</span>x<span class="Delimiter">)</span> || is_dummy<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"default-space"</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!x<span class="Delimiter">.</span>initialized<span class="Delimiter">)</span>
raise << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">": reagent not initialized: '"</span> << x<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
x<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>address<span class="Delimiter">(</span>x<span class="Delimiter">.</span>value<span class="Delimiter">,</span> space_base<span class="Delimiter">(</span>x<span class="Delimiter">)));</span>
x<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair<string<span class="Delimiter">,</span> string_tree*><span class="Delimiter">(</span><span class="Constant">"raw"</span><span class="Delimiter">,</span> <span class="Constant">NULL</span><span class="Delimiter">));</span>
assert<span class="Delimiter">(</span>is_raw<span class="Delimiter">(</span>x<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Normal">int</span> space_base<span class="Delimiter">(</span><span class="Normal">const</span> reagent& x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// temporary stub; will be replaced in a later layer</span>
<span class="Identifier">return</span> current_call<span class="Delimiter">().</span>default_space ? <span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>default_space+<span class="Comment">/*</span><span class="Comment">skip refcount</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> : <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">int</span> address<span class="Delimiter">(</span><span class="Normal">int</span> offset<span class="Delimiter">,</span> <span class="Normal">int</span> base<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>offset >= <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>base == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> offset<span class="Delimiter">;</span> <span class="Comment">// raw</span>
<span class="Normal">int</span> size = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>offset >= size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// todo: test</span>
raise << <span class="Constant">"location "</span> << offset << <span class="Constant">" is out of bounds "</span> << size << <span class="Constant">" at "</span> << base << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> base + <span class="Comment">/*</span><span class="Comment">skip length</span><span class="Comment">*/</span><span class="Constant">1</span> + offset<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: reads and writes to the 'default-space' variable have special behavior</span>
<span class="Delimiter">:(after "Begin Preprocess write_memory(x, data)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"default-space"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>data<span class="Delimiter">)</span> || !is_space<span class="Delimiter">(</span>x<span class="Delimiter">))</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"'default-space' should be of type address:array:location, but is "</span> << to_string<span class="Delimiter">(</span>x<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
current_call<span class="Delimiter">().</span>default_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="Delimiter">:(code)</span>
<span class="Normal">bool</span> is_space<span class="Delimiter">(</span><span class="Normal">const</span> reagent& r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Identifier">return</span> is_address_of_array_of_numbers<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario get_default_space)</span>
def main [
<span class="Normal">default</span>-space:space<span class="Special"> <- </span>copy <span class="Constant">10</span>/unsafe
<span class="Constant">1</span>:space/<span class="Special">raw <- </span>copy <span class="Normal">default</span>-space:space
]
<span class="traceContains">+mem: storing 10 in location 1</span>
<span class="Delimiter">:(after "Begin Preprocess read_memory(x)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"default-space"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
vector<<span class="Normal">double</span>> result<span class="Delimiter">;</span>
result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>default_space<span class="Delimiter">);</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: fix 'get'</span>
<span class="Delimiter">:(scenario lookup_sidesteps_default_space_in_get)</span>
def main [
<span class="Comment"># pretend pointer to container from outside (2000 reserved for refcount)</span>
<span class="Constant">2001</span>:num<span class="Special"> <- </span>copy <span class="Constant">34</span>
<span class="Constant">2002</span>:num<span class="Special"> <- </span>copy <span class="Constant">35</span>
<span class="Comment"># pretend address:array:location; in practice we'll use new</span>
<span class="Constant">1000</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># refcount</span>
<span class="Constant">1001</span>:num<span class="Special"> <- </span>copy <span class="Constant">5</span> <span class="Comment"># length</span>
<span class="Comment"># actual start of this recipe</span>
<span class="Normal">default</span>-space:space<span class="Special"> <- </span>copy <span class="Constant">1000</span>/unsafe
<span class="Constant">1</span>:&:point<span class="Special"> <- </span>copy <span class="Constant">2000</span>/unsafe
<span class="Constant">9</span>:num/<span class="Special">raw <- </span>get *<span class="Constant">1</span>:&:point<span class="Delimiter">,</span> <span class="Constant">1</span>:offset
]
<span class="traceContains">+mem: storing 35 in location 9</span>
<span class="Delimiter">:(before "Read element" following "case GET:")</span>
element<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair<string<span class="Delimiter">,</span> string_tree*><span class="Delimiter">(</span><span class="Constant">"raw"</span><span class="Delimiter">,</span> <span class="Constant">NULL</span><span class="Delimiter">));</span>
<span class="SalientComment">//:: fix 'index'</span>
<span class="Delimiter">:(scenario lookup_sidesteps_default_space_in_index)</span>
def main [
<span class="Comment"># pretend pointer to array from outside (2000 reserved for refcount)</span>
<span class="Constant">2001</span>:num<span class="Special"> <- </span>copy <span class="Constant">2</span> <span class="Comment"># length</span>
<span class="Constant">2002</span>:num<span class="Special"> <- </span>copy <span class="Constant">34</span>
<span class="Constant">2003</span>:num<span class="Special"> <- </span>copy <span class="Constant">35</span>
<span class="Comment"># pretend address:array:location; in practice we'll use new</span>
<span class="Constant">1000</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># refcount</span>
<span class="Constant">1001</span>:num<span class="Special"> <- </span>copy <span class="Constant">5</span> <span class="Comment"># length</span>
<span class="Comment"># actual start of this recipe</span>
<span class="Normal">default</span>-space:space<span class="Special"> <- </span>copy <span class="Constant">1000</span>/unsafe
<span class="Constant">1</span>:&:@:num<span class="Special"> <- </span>copy <span class="Constant">2000</span>/unsafe
<span class="Constant">9</span>:num/<span class="Special">raw <- </span>index *<span class="Constant">1</span>:&:@:num<span class="Delimiter">,</span> <span class="Constant">1</span>
]
<span class="traceContains">+mem: storing 35 in location 9</span>
<span class="Delimiter">:(before "Read element" following "case INDEX:")</span>
element<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair<string<span class="Delimiter">,</span> string_tree*><span class="Delimiter">(</span><span class="Constant">"raw"</span><span class="Delimiter">,</span> <span class="Constant">NULL</span><span class="Delimiter">));</span>
<span class="SalientComment">//:: convenience operation to automatically deduce the amount of space to</span>
<span class="SalientComment">//:: allocate in a default space with names</span>
<span class="Delimiter">:(scenario new_default_space)</span>
def main [
<span class="Normal">new</span>-<span class="Normal">default</span>-space
<span class="Normal">x</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span class="Normal">y</span>:num<span class="Special"> <- </span>copy <span class="Constant">3</span>
]
<span class="Comment"># allocate space for x and y, as well as the chaining slot at 0</span>
<span class="traceContains">+mem: array length is 3</span>
<span class="Delimiter">:(before "End is_disqualified Cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"number-of-locals"</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>
<span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">"number-of-locals"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Rewrite Instruction(curr, recipe result)")</span>
<span class="Comment">// rewrite `new-default-space` to</span>
<span class="Comment">// `default-space:space <- new location:type, number-of-locals:literal`</span>
<span class="Comment">// where N is Name[recipe][""]</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>name == <span class="Constant">"new-default-space"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
rewrite_default_space_instruction<span class="Delimiter">(</span>curr<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(after "Begin Preprocess read_memory(x)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"number-of-locals"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
vector<<span class="Normal">double</span>> result<span class="Delimiter">;</span>
result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>Name[get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> current_recipe_name<span class="Delimiter">())</span>][<span class="Constant">""</span>]<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">.</span>back<span class="Delimiter">()</span> == <span class="Constant">0</span><span class="Delimiter">)</span>
raise << <span class="Constant">"no space allocated for default-space in recipe "</span> << current_recipe_name<span class="Delimiter">()</span> << <span class="Constant">"; are you using names?</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(after "Begin Preprocess write_memory(x, data)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">"number-of-locals"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"can't write to special name 'number-of-locals'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: 'local-scope' is like 'new-default-space' except that we'll reclaim the</span>
<span class="SalientComment">//:: default-space when the routine exits</span>
<span class="Delimiter">:(scenario local_scope)</span>
def main [
<span class="Constant">1</span>:&<span class="Special"> <- </span>foo
<span class="Constant">2</span>:&<span class="Special"> <- </span>foo
<span class="Constant">3</span>:<span class="Normal">bool</span><span class="Special"> <- </span>equal <span class="Constant">1</span>:&<span class="Delimiter">,</span> <span class="Constant">2</span>:&
]
def foo [
local-scope
<span class="Normal">x</span>:num<span class="Special"> <- </span>copy <span class="Constant">34</span>
<span class="Identifier">return</span> <span class="Normal">default</span>-space:space
]
<span class="Comment"># both calls to foo should have received the same default-space</span>
<span class="traceContains">+mem: storing 1 in location 3</span>
<span class="Delimiter">:(scenario local_scope_frees_up_addresses)</span>
def main [
local-scope
<span class="Normal">x</span>:text<span class="Special"> <- </span><span class="Normal">new</span> [abc]
]
<span class="traceContains">+mem: clearing x:text</span>
<span class="Delimiter">:(before "End Rewrite Instruction(curr, recipe result)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>name == <span class="Constant">"local-scope"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
rewrite_default_space_instruction<span class="Delimiter">(</span>curr<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Comment">//: todo: do this in a transform, rather than magically in the reply instruction</span>
<span class="Delimiter">:(after "Falling Through End Of Recipe")</span>
try_reclaim_locals<span class="Delimiter">();</span>
<span class="Delimiter">:(after "Starting Reply")</span>
try_reclaim_locals<span class="Delimiter">();</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> try_reclaim_locals<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span class="Comment">// only reclaim routines starting with 'local-scope'</span>
<span class="Normal">const</span> recipe_ordinal r = get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> current_recipe_name<span class="Delimiter">());</span>
<span class="Normal">const</span> recipe& exiting_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>exiting_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Normal">const</span> instruction& inst = exiting_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>old_name != <span class="Constant">"local-scope"</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Comment">// reclaim any local variables unless they're being returned</span>
vector<<span class="Normal">double</span>> zeros<span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Comment">/*</span><span class="Comment">leave default space for last</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>exiting_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">const</span> instruction& inst = exiting_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">const</span> reagent& product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span class="Comment">// local variables only</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>product<span class="Delimiter">,</span> <span class="Constant">"lookup"</span><span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>product<span class="Delimiter">,</span> <span class="Constant">"raw"</span><span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> <span class="Comment">// tests often want to check such locations after they run</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>escaping<span class="Delimiter">(</span>product<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Comment">// End Checks For Reclaiming Locals</span>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"clearing "</span> << product<span class="Delimiter">.</span>original_string << end<span class="Delimiter">();</span>
zeros<span class="Delimiter">.</span>resize<span class="Delimiter">(</span>size_of<span class="Delimiter">(</span>product<span class="Delimiter">));</span>
write_memory<span class="Delimiter">(</span>product<span class="Delimiter">,</span> zeros<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"automatically abandoning "</span> << current_call<span class="Delimiter">().</span>default_space << end<span class="Delimiter">();</span>
abandon<span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>default_space<span class="Delimiter">,</span>
inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>type<span class="Delimiter">-></span>right<span class="Delimiter">,</span>
<span class="Comment">/*</span><span class="Comment">refcount</span><span class="Comment">*/</span><span class="Constant">1</span> + <span class="Comment">/*</span><span class="Comment">array length</span><span class="Comment">*/</span><span class="Constant">1</span> + <span class="Comment">/*</span><span class="Comment">number-of-locals</span><span class="Comment">*/</span>Name[r][<span class="Constant">""</span>]<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">// is this reagent one of the values returned by the current (reply) instruction?</span>
<span class="Comment">// is the corresponding ingredient saved in the caller?</span>
<span class="Normal">bool</span> escaping<span class="Delimiter">(</span><span class="Normal">const</span> reagent& r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>Current_routine<span class="Delimiter">);</span> <span class="Comment">// run-time only</span>
<span class="Comment">// nothing escapes when you fall through past end of recipe</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>current_step_index<span class="Delimiter">()</span> >= SIZE<span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>steps<span class="Delimiter">()))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>r == current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>caller_uses_product<span class="Delimiter">(</span>i<span class="Delimiter">))</span>
<span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</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>
<span class="Comment">//: since we don't decrement refcounts for escaping values above, make sure we</span>
<span class="Comment">//: don't increment them when the caller saves them either</span>
<span class="Delimiter">:(after "Write Products of Instruction")</span>
Update_refcounts_in_write_memory = should_update_refcounts_in_write_memory<span class="Delimiter">();</span>
<span class="Delimiter">:(before "End Write Products of Instruction")</span>
Update_refcounts_in_write_memory = <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">bool</span> should_update_refcounts_in_write_memory<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span class="Normal">const</span> instruction& inst = current_instruction<span class="Delimiter">();</span>
<span class="Comment">// End should_update_refcounts_in_write_memory Special-cases For Primitives</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation < MAX_PRIMITIVE_RECIPES<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>operation<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Normal">const</span> recipe& callee = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>operation<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>callee<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> callee<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>old_name != <span class="Constant">"local-scope"</span><span class="Delimiter">;</span> <span class="Comment">// callees that call local-scope are already dealt with before return</span>
<span class="Delimiter">}</span>
<span class="Normal">bool</span> caller_uses_product<span class="Delimiter">(</span><span class="Normal">int</span> product_index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>Current_routine<span class="Delimiter">);</span> <span class="Comment">// run-time only</span>
assert<span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>size<span class="Delimiter">()</span> == <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Normal">const</span> call& caller = *++Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>begin<span class="Delimiter">();</span>
<span class="Normal">const</span> instruction& caller_inst = to_instruction<span class="Delimiter">(</span>caller<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>product_index >= SIZE<span class="Delimiter">(</span>caller_inst<span class="Delimiter">.</span>products<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> !is_dummy<span class="Delimiter">(</span>caller_inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>product_index<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> rewrite_default_space_instruction<span class="Delimiter">(</span>instruction& curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!curr<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
raise << to_original_string<span class="Delimiter">(</span>curr<span class="Delimiter">)</span> << <span class="Constant">" can't take any ingredients</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
curr<span class="Delimiter">.</span>name = <span class="Constant">"new"</span><span class="Delimiter">;</span>
curr<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">"location:type"</span><span class="Delimiter">));</span>
curr<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">"number-of-locals:literal"</span><span class="Delimiter">));</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
raise << <span class="Constant">"new-default-space can't take any results</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">"default-space:space"</span><span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario local_scope_frees_up_addresses_inside_containers)</span>
container foo [
<span class="Normal">x</span>:num
<span class="Normal">y</span>:&:num
]
def main [
local-scope
<span class="Normal">x</span>:&:num<span class="Special"> <- </span><span class="Normal">new</span> number:type
<span class="Normal">y</span>:foo<span class="Special"> <- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> x:&:num
<span class="Comment"># x and y are both cleared when main returns</span>
]
<span class="traceContains">+mem: clearing x:&:num</span>
<span class="traceContains">+mem: decrementing refcount of 1006: 2 -> 1</span>
<span class="traceContains">+mem: clearing y:foo</span>
<span class="traceContains">+mem: decrementing refcount of 1006: 1 -> 0</span>
<span class="traceContains">+mem: automatically abandoning 1006</span>
<span class="Delimiter">:(scenario local_scope_returns_addresses_inside_containers)</span>
container foo [
<span class="Normal">x</span>:num
<span class="Normal">y</span>:&:num
]
def f [
local-scope
<span class="Normal">x</span>:&:num<span class="Special"> <- </span><span class="Normal">new</span> number:type
*x:&:num<span class="Special"> <- </span>copy <span class="Constant">12</span>
<span class="Normal">y</span>:foo<span class="Special"> <- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> x:&:num
<span class="Comment"># since y is 'escaping' f, it should not be cleared</span>
<span class="Identifier">return</span> y:foo
]
def main [
<span class="Constant">1</span>:foo<span class="Special"> <- </span>f
<span class="Constant">3</span>:num<span class="Special"> <- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> x:offset
<span class="Constant">4</span>:&:num<span class="Special"> <- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> y:offset
<span class="Constant">5</span>:num<span class="Special"> <- </span>copy *<span class="Constant">4</span>:&:num
<span class="Constant">1</span>:foo<span class="Special"> <- </span>put <span class="Constant">1</span>:foo<span class="Delimiter">,</span> y:offset<span class="Delimiter">,</span> <span class="Constant">0</span>
<span class="Constant">4</span>:&:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 34 in location 1</span>
<span class="traceContains">+mem: storing 1006 in location 2</span>
<span class="traceContains">+mem: storing 34 in location 3</span>
<span class="Comment"># refcount of 1:foo shouldn't include any stray ones from f</span>
<span class="traceContains">+run: {4: ("address" "number")} <- get {1: "foo"}, {y: "offset"}</span>
<span class="traceContains">+mem: incrementing refcount of 1006: 1 -> 2</span>
<span class="Comment"># 1:foo wasn't abandoned/cleared</span>
<span class="traceContains">+run: {5: "number"} <- copy {4: ("address" "number"), "lookup": ()}</span>
<span class="traceContains">+mem: storing 12 in location 5</span>
<span class="traceContains">+run: {1: "foo"} <- put {1: "foo"}, {y: "offset"}, {0: "literal"}</span>
<span class="traceContains">+mem: decrementing refcount of 1006: 2 -> 1</span>
<span class="traceContains">+run: {4: ("address" "number")} <- copy {0: "literal"}</span>
<span class="traceContains">+mem: decrementing refcount of 1006: 1 -> 0</span>
<span class="traceContains">+mem: automatically abandoning 1006</span>
<span class="Delimiter">:(scenario local_scope_claims_return_values_when_not_saved)</span>
def f [
local-scope
<span class="Normal">x</span>:&:num<span class="Special"> <- </span><span class="Normal">new</span> number:type
reply x:&:num
]
def main [
f <span class="Comment"># doesn't save result</span>
]
<span class="Comment"># x reclaimed</span>
<span class="traceContains">+mem: automatically abandoning 1004</span>
<span class="Comment"># f's local scope reclaimed</span>
<span class="traceContains">+mem: automatically abandoning 1000</span>
<span class="SalientComment">//:: all recipes must set default-space one way or another</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Normal">bool</span> Hide_missing_default_space_errors = <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Checks")</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_default_space<span class="Delimiter">);</span> <span class="Comment">// idempotent</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> check_default_space<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Hide_missing_default_space_errors<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// skip previous core tests; this is only for mu code</span>
<span class="Normal">const</span> recipe& caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
<span class="Comment">// skip scenarios (later layer)</span>
<span class="Comment">// user code should never create recipes with underscores in their names</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">.</span>find<span class="Delimiter">(</span><span class="Constant">"scenario_"</span><span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// skip mu scenarios which will use raw memory locations</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">.</span>find<span class="Delimiter">(</span><span class="Constant">"run_"</span><span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// skip calls to 'run', which should be in scenarios and will also use raw memory locations</span>
<span class="Comment">// assume recipes with only numeric addresses know what they're doing (usually tests)</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!contains_non_special_name<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"--- check that recipe "</span> << caller<span class="Delimiter">.</span>name << <span class="Constant">" sets default-space"</span> << end<span class="Delimiter">();</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">()</span>
|| caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name != <span class="Constant">"default-space"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller<span class="Delimiter">.</span>name << <span class="Constant">" does not seem to start with default-space or local-scope</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(after "Load .mu Core")</span>
Hide_missing_default_space_errors = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(after "Test Runs")</span>
Hide_missing_default_space_errors = <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">:(after "Running Main")</span>
Hide_missing_default_space_errors = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">bool</span> contains_non_special_name<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> <span class="Normal">int</span>>::iterator p = Name[r]<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Name[r]<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">-></span>first<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">-></span>first<span class="Delimiter">.</span>find<span class="Delimiter">(</span><span class="Constant">"stash_"</span><span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> <span class="Comment">// generated by rewrite_stashes_to_text (cross-layer)</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_special_name<span class="Delimiter">(</span>p<span class="Delimiter">-></span>first<span class="Delimiter">))</span>
<span class="Identifier">return</span> <span class="Constant">true</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>
<span class="Comment">// reagent comparison -- only between reagents in a single recipe</span>
<span class="Normal">bool</span> <span class="Normal">operator</span>==<span class="Delimiter">(</span><span class="Normal">const</span> reagent& a<span class="Delimiter">,</span> <span class="Normal">const</span> reagent& b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">.</span>name != b<span class="Delimiter">.</span>name<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>property<span class="Delimiter">(</span>a<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">)</span> != property<span class="Delimiter">(</span>b<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">bool</span> <span class="Normal">operator</span><<span class="Delimiter">(</span><span class="Normal">const</span> reagent& a<span class="Delimiter">,</span> <span class="Normal">const</span> reagent& b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">int</span> aspace = <span class="Constant">0</span><span class="Delimiter">,</span> bspace = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>a<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">))</span> aspace = to_integer<span class="Delimiter">(</span>property<span class="Delimiter">(</span>a<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">)-></span>value<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>b<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">))</span> bspace = to_integer<span class="Delimiter">(</span>property<span class="Delimiter">(</span>b<span class="Delimiter">,</span> <span class="Constant">"space"</span><span class="Delimiter">)-></span>value<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>aspace != bspace<span class="Delimiter">)</span> <span class="Identifier">return</span> aspace < bspace<span class="Delimiter">;</span>
<span class="Identifier">return</span> a<span class="Delimiter">.</span>name < b<span class="Delimiter">.</span>name<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
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