RosettaCodeData/Task/Compiler-syntax-analyzer/Phix/compiler-syntax-analyzer-2.phix

(phixonline)-->
 <span style="color: #000080;font-style:italic;">--
 -- demo\rosetta\Compiler\parse.exw
 -- ===============================
 --</span>
 <span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 <span style="color: #008080;">include</span> <span style="color: #000000;">parse</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>

 <span style="color: #008080;">procedure</span> <span style="color: #000000;">print_ast</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
     <span style="color: #008080;">if</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">==</span> <span style="color: #004600;">NULL</span> <span style="color: #008080;">then</span>
         <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">output_file</span><span style="color: #0000FF;">,</span><span style="color: #008000;">";\n"</span><span style="color: #0000FF;">)</span>
     <span style="color: #008080;">else</span>
         <span style="color: #004080;">integer</span> <span style="color: #000000;">ttype</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
         <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">output_file</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tkNames</span><span style="color: #0000FF;">[</span><span style="color: #000000;">ttype</span><span style="color: #0000FF;">])</span>
         <span style="color: #008080;">if</span> <span style="color: #000000;">ttype</span><span style="color: #0000FF;">=</span><span style="color: #000000;">tk_Identifier</span> <span style="color: #008080;">then</span>
             <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">output_file</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" %s\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">])</span>
         <span style="color: #008080;">elsif</span> <span style="color: #000000;">ttype</span><span style="color: #0000FF;">=</span><span style="color: #000000;">tk_Integer</span> <span style="color: #008080;">then</span>
             <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">output_file</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" %d\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">])</span>
         <span style="color: #008080;">elsif</span> <span style="color: #000000;">ttype</span><span style="color: #0000FF;">=</span><span style="color: #000000;">tk_String</span> <span style="color: #008080;">then</span>
             <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">output_file</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" %s\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">enquote</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">]))</span>
         <span style="color: #008080;">else</span>
             <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">output_file</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">)</span>
             <span style="color: #000000;">print_ast</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">])</span>
             <span style="color: #000000;">print_ast</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">])</span>
         <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
     <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>

 <span style="color: #008080;">function</span> <span style="color: #000000;">ptree</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
     <span style="color: #008080;">if</span> <span style="color: #004080;">sequence</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
         <span style="color: #004080;">integer</span> <span style="color: #000000;">t1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
         <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">deep_copy</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
         <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tkNames</span><span style="color: #0000FF;">[</span><span style="color: #000000;">t1</span><span style="color: #0000FF;">]</span>
         <span style="color: #008080;">if</span> <span style="color: #008080;">not</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t1</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">tk_Identifier</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tk_String</span><span style="color: #0000FF;">})</span> <span style="color: #008080;">then</span>
             <span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">2</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
                 <span style="color: #008080;">if</span> <span style="color: #000000;">t1</span><span style="color: #0000FF;">=</span><span style="color: #000000;">tk_Sequence</span> <span style="color: #008080;">and</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]=</span><span style="color: #004600;">NULL</span> <span style="color: #008080;">then</span>
                     <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"NULL"</span>
                 <span style="color: #008080;">else</span>
                     <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">ptree</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">])</span>
                 <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
             <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
         <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
     <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
     <span style="color: #008080;">return</span> <span style="color: #000000;">t</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">function</span>

 <span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">cl</span><span style="color: #0000FF;">)</span>
     <span style="color: #000000;">open_files</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cl</span><span style="color: #0000FF;">)</span>
     <span style="color: #000000;">toks</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">lex</span><span style="color: #0000FF;">()</span>
     <span style="color: #004080;">object</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">parse</span><span style="color: #0000FF;">()</span>
     <span style="color: #000000;">print_ast</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
 <span style="color: #7060A8;">pp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ptree</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">),{</span><span style="color: #004600;">pp_Nest</span><span style="color: #0000FF;">,</span><span style="color: #000000;">10</span><span style="color: #0000FF;">,</span><span style="color: #004600;">pp_Pause</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #004600;">pp_IntCh</span><span style="color: #0000FF;">,</span><span style="color: #004600;">false</span><span style="color: #0000FF;">})</span>
     <span style="color: #000000;">close_files</span><span style="color: #0000FF;">()</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>

 <span style="color: #000080;font-style:italic;">--main(command_line())</span>
 <span style="color: #000000;">main</span><span style="color: #0000FF;">({</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"test3.c"</span><span style="color: #0000FF;">})</span> <span style="color: #000080;font-style:italic;">-- not parseable!
 --main({0,0,"primes.c"})    -- as Algol, C, Python (apart from spacing)
 --main({0,0,"count.c"})     -- as AWK              (       ""         )</span>
<!--