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<span class="Comment">//: Clean syntax to manipulate and check the screen in scenarios.</span>
<span class="Comment">//: Instructions 'assume-screen' and 'screen-should-contain' implicitly create</span>
<span class="Comment">//: a variable called 'screen' that is accessible to later instructions in the</span>
<span class="Comment">//: scenario. 'screen-should-contain' can check unicode characters in the fake</span>
<span class="Comment">//: screen</span>
<span class="Comment">//: first make sure we don't mangle these functions in other transforms</span>
<span class="Delimiter">:(before "End initialize_transform_rewrite_literal_string_to_text()")</span>
recipes_taking_literal_strings<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">"screen-should-contain"</span><span class="Delimiter">);</span>
recipes_taking_literal_strings<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">"screen-should-contain-in-color"</span><span class="Delimiter">);</span>
<span class="Delimiter">:(scenarios run_mu_scenario)</span>
<span class="Delimiter">:(scenario screen_in_scenario)</span>
scenario screen-in-scenario [
assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
run [
<span class="Constant">1</span>:character<span class="Special"> <- </span>copy <span class="Constant">97</span>/a
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">1</span>:character/a
]
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>a <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
]
<span class="Comment"># checks are inside scenario</span>
<span class="Delimiter">:(scenario screen_in_scenario_unicode)</span>
scenario screen-in-scenario-unicode-color [
assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
run [
<span class="Constant">1</span>:character<span class="Special"> <- </span>copy <span class="Constant">955</span>/greek-small-lambda
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">1</span>:character/lambda<span class="Delimiter">,</span> <span class="Constant">1</span>/red
<span class="Constant">2</span>:character<span class="Special"> <- </span>copy <span class="Constant">97</span>/a
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">2</span>:character/a
]
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>λa <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
]
<span class="Comment"># checks are inside scenario</span>
<span class="Delimiter">:(scenario screen_in_scenario_color)</span>
<span class="Comment"># screen-should-contain can check unicode characters in the fake screen</span>
scenario screen-in-scenario-color [
assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
run [
<span class="Constant">1</span>:character<span class="Special"> <- </span>copy <span class="Constant">955</span>/greek-small-lambda
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">1</span>:character/lambda<span class="Delimiter">,</span> <span class="Constant">1</span>/red
<span class="Constant">2</span>:character<span class="Special"> <- </span>copy <span class="Constant">97</span>/a
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">2</span>:character/a<span class="Delimiter">,</span> <span class="Constant">7</span>/white
]
<span class="Comment"># screen-should-contain shows everything</span>
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>λa <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
<span class="Comment"># screen-should-contain-in-color filters out everything except the given</span>
<span class="Comment"># color, all you see is the 'a' in white.</span>
screen-should-contain-in-color <span class="Constant">7</span>/white<span class="Delimiter">,</span> [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span> a <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
<span class="Comment"># ..and the λ in red.</span>
screen-should-contain-in-color <span class="Constant">1</span>/red<span class="Delimiter">,</span> [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>λ <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
]
<span class="Comment"># checks are inside scenario</span>
<span class="Delimiter">:(scenario screen_in_scenario_error)</span>
<span class="Special">% Scenario_testing_scenario = true;</span>
<span class="Special">% Hide_errors = true;</span>
scenario screen-in-scenario-error [
assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
run [
<span class="Constant">1</span>:character<span class="Special"> <- </span>copy <span class="Constant">97</span>/a
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">1</span>:character/a
]
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>b <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
]
<span class="traceContains">+error: expected screen location (0, 0) to contain 98 ('b') instead of 97 ('a')</span>
<span class="Delimiter">:(scenario screen_in_scenario_color_error)</span>
<span class="Special">% Scenario_testing_scenario = true;</span>
<span class="Special">% Hide_errors = true;</span>
<span class="Comment"># screen-should-contain can check unicode characters in the fake screen</span>
scenario screen-in-scenario-color [
assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
run [
<span class="Constant">1</span>:character<span class="Special"> <- </span>copy <span class="Constant">97</span>/a
<span class="Normal">screen</span>:address:screen<span class="Special"> <- </span>print screen:address:screen<span class="Delimiter">,</span> <span class="Constant">1</span>:character/a<span class="Delimiter">,</span> <span class="Constant">1</span>/red
]
screen-should-contain-in-color <span class="Constant">2</span>/green<span class="Delimiter">,</span> [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>a <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
]
<span class="traceContains">+error: expected screen location (0, 0) to be in color 2 instead of 1</span>
<span class="Delimiter">:(scenarios run)</span>
<span class="Delimiter">:(scenario convert_names_does_not_fail_when_mixing_special_names_and_numeric_locations)</span>
<span class="Special">% Scenario_testing_scenario = true;</span>
def main [
<span class="Normal">screen</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span>:number
]
<span class="traceAbsent">-error: mixing variable names and numeric addresses in main</span>
$error: <span class="Constant">0</span>
<span class="Delimiter">:(scenarios run_mu_scenario)</span>
<span class="Comment">//: It's easier to implement assume-screen and other similar scenario-only</span>
<span class="Comment">//: primitives if they always write to a fixed location. So we'll assign a</span>
<span class="Comment">//: single fixed location for the per-scenario screen, keyboard, file system,</span>
<span class="Comment">//: etc. Carve space for these fixed locations out of the reserved-for-test</span>
<span class="Comment">//: locations.</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Normal">extern</span> <span class="Normal">const</span> <span class="Normal">int</span> Max_variables_in_scenarios = Reserved_for_tests-<span class="Constant">100</span><span class="Delimiter">;</span>
<span class="Normal">int</span> Next_predefined_global_for_scenarios = Max_variables_in_scenarios<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Setup")</span>
assert<span class="Delimiter">(</span>Next_predefined_global_for_scenarios < Reserved_for_tests<span class="Delimiter">);</span>
<span class="Delimiter">:(after "transform_all()" following "case RUN:")</span>
<span class="Comment">// There's a restriction on the number of variables 'run' can use, so that</span>
<span class="Comment">// it can avoid colliding with the dynamic allocator in case it doesn't</span>
<span class="Comment">// initialize a default-space.</span>
assert<span class="Delimiter">(</span>Name[tmp_recipe<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>][<span class="Constant">""</span>] < Max_variables_in_scenarios<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Comment">// Scenario Globals.</span>
<span class="Normal">extern</span> <span class="Normal">const</span> <span class="Normal">int</span> SCREEN = Next_predefined_global_for_scenarios++<span class="Delimiter">;</span>
<span class="Comment">// End Scenario Globals.</span>
<span class="Comment">//: give 'screen' a fixed location in scenarios</span>
<span class="Delimiter">:(before "End Special Scenario Variable Names(r)")</span>
Name[r][<span class="Constant">"screen"</span>] = SCREEN<span class="Delimiter">;</span>
<span class="Comment">//: make 'screen' always a raw location in scenarios</span>
<span class="Delimiter">:(before "End is_special_name Cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">"screen"</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 `assume-screen width, height` to</span>
<span class="Comment">// `screen:address:screen <- new-fake-screen width, height`</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>name == <span class="Constant">"assume-screen"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
curr<span class="Delimiter">.</span>name = <span class="Constant">"new-fake-screen"</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> <span class="Delimiter">{</span>
raise << result<span class="Delimiter">.</span>name << <span class="Constant">": 'assume-screen' has no products</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!starts_with<span class="Delimiter">(</span>result<span class="Delimiter">.</span>name<span class="Delimiter">,</span> <span class="Constant">"scenario_"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << result<span class="Delimiter">.</span>name << <span class="Constant">": 'assume-screen' can't be called here, only in scenarios</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<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">"screen:address:screen/raw"</span><span class="Delimiter">));</span>
curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>SCREEN<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario assume_screen_shows_up_in_errors)</span>
<span class="Special">% Hide_errors = true;</span>
scenario error-in-assume-screen [
assume-screen width<span class="Delimiter">,</span> <span class="Constant">5</span>
]
<span class="traceContains">+error: scenario_error-in-assume-screen: missing type for 'width' in 'assume-screen width, 5'</span>
<span class="Comment">//: screen-should-contain is a regular instruction</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
SCREEN_SHOULD_CONTAIN<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen-should-contain"</span><span class="Delimiter">,</span> SCREEN_SHOULD_CONTAIN<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> SCREEN_SHOULD_CONTAIN: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'screen-should-contain' requires exactly one ingredient, but got '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"first ingredient of 'screen-should-contain' should be a literal string, but got '"</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> SCREEN_SHOULD_CONTAIN: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!Passed<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
check_screen<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">,</span> -<span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
SCREEN_SHOULD_CONTAIN_IN_COLOR<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen-should-contain-in-color"</span><span class="Delimiter">,</span> SCREEN_SHOULD_CONTAIN_IN_COLOR<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> SCREEN_SHOULD_CONTAIN_IN_COLOR: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'screen-should-contain-in-color' requires exactly two ingredients, but got '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_number<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"first ingredient of 'screen-should-contain-in-color' should be a number (color code), but got '"</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"second ingredient of 'screen-should-contain-in-color' should be a literal string, but got '"</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> SCREEN_SHOULD_CONTAIN_IN_COLOR: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!Passed<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)));</span>
check_screen<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Types")</span>
<span class="Comment">// scan an array of characters in a unicode-aware, bounds-checked manner</span>
<span class="Normal">struct</span> raw_string_stream <span class="Delimiter">{</span>
<span class="Normal">int</span> index<span class="Delimiter">;</span>
<span class="Normal">const</span> <span class="Normal">int</span> max<span class="Delimiter">;</span>
<span class="Normal">const</span> <span class="Normal">char</span>* buf<span class="Delimiter">;</span>
raw_string_stream<span class="Delimiter">(</span><span class="Normal">const</span> string&<span class="Delimiter">);</span>
<span class="Normal">uint32_t</span> get<span class="Delimiter">();</span> <span class="Comment">// unicode codepoint</span>
<span class="Normal">uint32_t</span> peek<span class="Delimiter">();</span> <span class="Comment">// unicode codepoint</span>
<span class="Normal">bool</span> at_end<span class="Delimiter">()</span> <span class="Normal">const</span><span class="Delimiter">;</span>
<span class="Normal">void</span> skip_whitespace_and_comments<span class="Delimiter">();</span>
<span class="Delimiter">};</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> check_screen<span class="Delimiter">(</span><span class="Normal">const</span> string& expected_contents<span class="Delimiter">,</span> <span class="Normal">const</span> <span class="Normal">int</span> color<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">int</span> screen_location = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> SCREEN<span class="Delimiter">)</span>+<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="Normal">int</span> data_offset = find_element_name<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen"</span><span class="Delimiter">),</span> <span class="Constant">"data"</span><span class="Delimiter">,</span> <span class="Constant">""</span><span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>data_offset >= <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Normal">int</span> screen_data_location = screen_location+data_offset<span class="Delimiter">;</span> <span class="Comment">// type: address:array:character</span>
<span class="Normal">int</span> screen_data_start = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_data_location<span class="Delimiter">)</span> + <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="Comment">// type: array:character</span>
<span class="Normal">int</span> width_offset = find_element_name<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen"</span><span class="Delimiter">),</span> <span class="Constant">"num-columns"</span><span class="Delimiter">,</span> <span class="Constant">""</span><span class="Delimiter">);</span>
<span class="Normal">int</span> screen_width = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_location+width_offset<span class="Delimiter">);</span>
<span class="Normal">int</span> height_offset = find_element_name<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen"</span><span class="Delimiter">),</span> <span class="Constant">"num-rows"</span><span class="Delimiter">,</span> <span class="Constant">""</span><span class="Delimiter">);</span>
<span class="Normal">int</span> screen_height = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_location+height_offset<span class="Delimiter">);</span>
raw_string_stream cursor<span class="Delimiter">(</span>expected_contents<span class="Delimiter">);</span>
<span class="Comment">// todo: too-long expected_contents should fail</span>
<span class="Normal">int</span> addr = screen_data_start+<span class="Comment">/*</span><span class="Comment">skip length</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> row = <span class="Constant">0</span><span class="Delimiter">;</span> row < screen_height<span class="Delimiter">;</span> ++row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
cursor<span class="Delimiter">.</span>skip_whitespace_and_comments<span class="Delimiter">();</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>at_end<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'.'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": each row of the expected screen should start with a '.'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
Passed = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> column = <span class="Constant">0</span><span class="Delimiter">;</span> column < screen_width<span class="Delimiter">;</span> ++column<span class="Delimiter">,</span> addr+= <span class="Comment">/*</span><span class="Comment">size of screen-cell</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">const</span> <span class="Normal">int</span> cell_color_offset = <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Normal">uint32_t</span> curr = cursor<span class="Delimiter">.</span>get<span class="Delimiter">();</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">)</span> == <span class="Constant">0</span> && isspace<span class="Delimiter">(</span>curr<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>curr == <span class="Constant">' '</span> && color != -<span class="Constant">1</span> && color != get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span class="Comment">// filter out other colors</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">)</span> != <span class="Constant">0</span> && get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">)</span> == curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>color == -<span class="Constant">1</span> || color == get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Comment">// contents match but color is off</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Current_scenario && !Scenario_testing_scenario<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// genuine test in a mu file</span>
raise << <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">F - "</span> << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": expected screen location ("</span> << row << <span class="Constant">", "</span> << column << <span class="Constant">", address "</span> << addr << <span class="Constant">", value "</span> << no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">))</span> << <span class="Constant">") to be in color "</span> << color << <span class="Constant">" instead of "</span> << no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> << <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
dump_screen<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
<span class="Comment">// just testing check_screen</span>
raise << <span class="Constant">"expected screen location ("</span> << row << <span class="Constant">", "</span> << column << <span class="Constant">") to be in color "</span> << color << <span class="Constant">" instead of "</span> << no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!Scenario_testing_scenario<span class="Delimiter">)</span> Passed = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">// really a mismatch</span>
<span class="Comment">// can't print multi-byte unicode characters in errors just yet. not very useful for debugging anyway.</span>
<span class="Normal">char</span> expected_pretty[<span class="Constant">10</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>curr < <span class="Constant">256</span> && !iscntrl<span class="Delimiter">(</span>curr<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span class="Comment">// " ('<curr>')"</span>
expected_pretty[<span class="Constant">0</span>] = <span class="Constant">' '</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">1</span>] = <span class="Constant">'('</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">2</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">3</span>] = <span class="Normal">static_cast</span><<span class="Normal">unsigned</span> <span class="Normal">char</span>><span class="Delimiter">(</span>curr<span class="Delimiter">),</span> expected_pretty[<span class="Constant">4</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">5</span>] = <span class="Constant">')'</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">6</span>] = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">char</span> actual_pretty[<span class="Constant">10</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">)</span> < <span class="Constant">256</span> && !iscntrl<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span class="Comment">// " ('<curr>')"</span>
actual_pretty[<span class="Constant">0</span>] = <span class="Constant">' '</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">1</span>] = <span class="Constant">'('</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">2</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">3</span>] = <span class="Normal">static_cast</span><<span class="Normal">unsigned</span> <span class="Normal">char</span>><span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">)),</span> actual_pretty[<span class="Constant">4</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">5</span>] = <span class="Constant">')'</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">6</span>] = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
ostringstream color_phrase<span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>color != -<span class="Constant">1</span><span class="Delimiter">)</span> color_phrase << <span class="Constant">" in color "</span> << color<span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Current_scenario && !Scenario_testing_scenario<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// genuine test in a mu file</span>
raise << <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">F - "</span> << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": expected screen location ("</span> << row << <span class="Constant">", "</span> << column << <span class="Constant">") to contain "</span> << curr << expected_pretty << color_phrase<span class="Delimiter">.</span>str<span class="Delimiter">()</span> << <span class="Constant">" instead of "</span> << no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">))</span> << actual_pretty << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
dump_screen<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
<span class="Comment">// just testing check_screen</span>
raise << <span class="Constant">"expected screen location ("</span> << row << <span class="Constant">", "</span> << column << <span class="Constant">") to contain "</span> << curr << expected_pretty << color_phrase<span class="Delimiter">.</span>str<span class="Delimiter">()</span> << <span class="Constant">" instead of "</span> << no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> addr<span class="Delimiter">))</span> << actual_pretty << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!Scenario_testing_scenario<span class="Delimiter">)</span> Passed = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'.'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": row "</span> << row << <span class="Constant">" of the expected screen is too long</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
Passed = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
cursor<span class="Delimiter">.</span>skip_whitespace_and_comments<span class="Delimiter">();</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!cursor<span class="Delimiter">.</span>at_end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
raise << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": expected screen has too many rows</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
Passed = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
raw_string_stream::raw_string_stream<span class="Delimiter">(</span><span class="Normal">const</span> string& backing<span class="Delimiter">)</span> :index<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">),</span> max<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>backing<span class="Delimiter">)),</span> buf<span class="Delimiter">(</span>backing<span class="Delimiter">.</span>c_str<span class="Delimiter">())</span> <span class="Delimiter">{}</span>
<span class="Normal">bool</span> raw_string_stream::at_end<span class="Delimiter">()</span> <span class="Normal">const</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>index >= max<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>tb_utf8_char_length<span class="Delimiter">(</span>buf[index]<span class="Delimiter">)</span> > max-index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << <span class="Constant">"unicode string seems corrupted at index "</span><< index << <span class="Constant">" character "</span> << <span class="Normal">static_cast</span><<span class="Normal">int</span>><span class="Delimiter">(</span>buf[index]<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<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="Normal">uint32_t</span> raw_string_stream::get<span class="Delimiter">()</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>index < max<span class="Delimiter">);</span> <span class="Comment">// caller must check bounds before calling 'get'</span>
<span class="Normal">uint32_t</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">int</span> length = tb_utf8_char_to_unicode<span class="Delimiter">(</span>&result<span class="Delimiter">,</span> &buf[index]<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>length != TB_EOF<span class="Delimiter">);</span>
index += length<span class="Delimiter">;</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">uint32_t</span> raw_string_stream::peek<span class="Delimiter">()</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>index < max<span class="Delimiter">);</span> <span class="Comment">// caller must check bounds before calling 'get'</span>
<span class="Normal">uint32_t</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">int</span> length = tb_utf8_char_to_unicode<span class="Delimiter">(</span>&result<span class="Delimiter">,</span> &buf[index]<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>length != TB_EOF<span class="Delimiter">);</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> raw_string_stream::skip_whitespace_and_comments<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span class="Normal">while</span> <span class="Delimiter">(</span>!at_end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>peek<span class="Delimiter">()))</span> get<span class="Delimiter">();</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>peek<span class="Delimiter">()</span> == <span class="Constant">'#'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// skip comment</span>
get<span class="Delimiter">();</span>
<span class="Normal">while</span> <span class="Delimiter">(</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> get<span class="Delimiter">();</span> <span class="Comment">// implicitly also handles CRLF</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
_DUMP_SCREEN<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"$dump-screen"</span><span class="Delimiter">,</span> _DUMP_SCREEN<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> _DUMP_SCREEN: <span class="Delimiter">{</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> _DUMP_SCREEN: <span class="Delimiter">{</span>
dump_screen<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> dump_screen<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span class="Normal">int</span> screen_location = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> SCREEN<span class="Delimiter">)</span> + <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="Normal">int</span> width_offset = find_element_name<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen"</span><span class="Delimiter">),</span> <span class="Constant">"num-columns"</span><span class="Delimiter">,</span> <span class="Constant">""</span><span class="Delimiter">);</span>
<span class="Normal">int</span> screen_width = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_location+width_offset<span class="Delimiter">);</span>
<span class="Normal">int</span> height_offset = find_element_name<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen"</span><span class="Delimiter">),</span> <span class="Constant">"num-rows"</span><span class="Delimiter">,</span> <span class="Constant">""</span><span class="Delimiter">);</span>
<span class="Normal">int</span> screen_height = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_location+height_offset<span class="Delimiter">);</span>
<span class="Normal">int</span> data_offset = find_element_name<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"screen"</span><span class="Delimiter">),</span> <span class="Constant">"data"</span><span class="Delimiter">,</span> <span class="Constant">""</span><span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>data_offset >= <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Normal">int</span> screen_data_location = screen_location+data_offset<span class="Delimiter">;</span> <span class="Comment">// type: address:array:character</span>
<span class="Normal">int</span> screen_data_start = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_data_location<span class="Delimiter">)</span> + <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="Comment">// type: array:character</span>
assert<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> screen_data_start<span class="Delimiter">)</span> == screen_width*screen_height<span class="Delimiter">);</span>
<span class="Normal">int</span> curr = screen_data_start+<span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// skip length</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> row = <span class="Constant">0</span><span class="Delimiter">;</span> row < screen_height<span class="Delimiter">;</span> ++row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
cerr << <span class="Constant">'.'</span><span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span> col < screen_width<span class="Delimiter">;</span> ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">))</span>
cerr << to_unicode<span class="Delimiter">(</span><span class="Normal">static_cast</span><<span class="Normal">uint32_t</span>><span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)));</span>
<span class="Normal">else</span>
cerr << <span class="Constant">' '</span><span class="Delimiter">;</span>
curr += <span class="Comment">/*</span><span class="Comment">size of screen-cell</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
cerr << <span class="Constant">".</span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
</pre>
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