Какой самый простой и быстрый способ нарисовать дерево разбора с помощью .Net?

Question

Я написал простой анализатор сверху вниз, используя c #.Это консольное приложение.Я хотел бы, чтобы парсер мог сохранить в конце вычисления файл изображения дерева разбора.Я думаю, что я мог бы использовать graphviz, но я хотел бы узнать ваше мнение.Спасибо.

Answer 1

Вы можете использовать SVG в качестве альтернативы DOT / Graphviz; оба, вероятно, одинаково хороши.

В любом случае, должно быть довольно легко пройтись по дереву разбора и произвести вывод, который будет управлять рисованием графика. Если дерево построено явно, рекурсивный обход должен быть прост в реализации. Если дерево не построено, вам нужно будет генерировать узлы графа на лету при разборе.

Для DMS Software Reengineering Toolkit , который создает явные AST, мы делаем что-то более простое: обходим дерево и просто выводим корневой узел на одной строке, а его потомки - на отдельные выделенные строки текста. , Мы делаем это в формате стиля LISP (по историческим причинам) и в формате XML (очень желательно). Попытка кодировать это, если вы можете сделать рекурсивную прогулку по дереву, вероятно, занимает около часа.

Это не очень красиво, как рисование графиков, но оно не страдает от проблемы рисования огромных графиков ... просто от получения огромных текстовых выводов, но тех, с которыми вы можете перемещаться с меньше или perl .

Даже в небольшом AST может быть много узлов, и, таким образом, вы не сможете рисовать / понимать графику. Мой опыт показывает, что AST имеет примерно 5-8 узлов на строку источника.

Для следующего 22-строчного кода PLSQL:

-- available online in file 'sample3'
DECLARE
   x NUMBER := 0;
   counter NUMBER := 0;
BEGIN
   FOR i IN 1..4 LOOP
      x := x + 1000;
      counter := counter + 1;
      INSERT INTO temp VALUES (x, counter, 'outer loop');
      /* start an inner block */
      DECLARE
         x NUMBER := 0;  -- this is a local version of x
      BEGIN
         FOR i IN 1..4 LOOP
            x := x + 1;  -- this increments the local x
            counter := counter + 1;
            INSERT INTO temp VALUES (x, counter, 'inner loop');
         END LOOP;
      END;
   END LOOP;
   COMMIT;
END;

Вот пример выходных данных, 180 узлов дерева (обратите внимание на информацию о положении источника для каждого узла):

 C:\DMS\Domains\PLSQL\Tools\Parser\Source>run ../domainparser ++XML C:\DMS\Domains\PLSQL\Examples\sample.sql
 Domain Parser for PLSQL 2.3.2 Copyright (C) Semantic Designs 1996-2009; All Rights Reserved
 180 tree nodes in tree.
 2 ambiguity nodes in tree.
 <DMSForest>
  <tree node="root" type="1" domain="1" id="1ky2c" parents="0" line="3" column="1" file="1">
   <tree node="plsql_block" type="458" domain="1" id="1ky1x" line="3" column="1" file="1">
    <precomment child=" 1" index="1">-- available online in file 'sample3'</precomment>
    <tree node="block_body" type="463" domain="1" id="1ky28" line="4" column="4" file="1">
     <tree node="optional_type_or_item_declaration_list" type="465" domain="1" id="1kxp9" line="4" column="4" file="1">
      <tree node="optional_type_or_item_declaration_list" type="465" domain="1" id="1kxox" line="4" column="4" file="1">
       <tree node="optional_type_or_item_declaration_list" type="464" domain="1" id="1kxnz" line="4" column="4" file="1"/>
       <tree node="item_declaration" type="139" domain="1" id="1kxoy" line="4" column="4" file="1">
        <tree node="IDENTIFIER" type="1691" domain="1" id="1kxny" line="4" column="4" file="1">
         <literal>x</literal>
        </tree>
        <tree node="datatype" type="47" domain="1" id="1kxo3" line="4" column="6" file="1"/>
        <tree node="not_null_option" type="126" domain="1" id="1kxo4" line="4" column="13" file="1"/>
        <tree node="initial_value" type="146" domain="1" id="1kxoq" line="4" column="13" file="1">
         <tree node="logical_disjunction" type="330" domain="1" id="1kxon" line="4" column="16" file="1">
          <tree node="logical_conjunction" type="332" domain="1" id="1kxol" line="4" column="16" file="1">
           <tree node="sum" type="356" domain="1" id="1kxog" line="4" column="16" file="1">
            <tree node="product" type="360" domain="1" id="1kxoe" line="4" column="16" file="1">
             <tree node="power" type="367" domain="1" id="1kxo9" line="4" column="16" file="1">
              <tree node="NATURAL" type="1422" domain="1" id="1kxo6" literal="0" line="4" column="16" file="1"/>
             </tree>
            </tree>
           </tree>
          </tree>
         </tree>
        </tree>
       </tree>
      </tree>
      <tree node="item_declaration" type="139" domain="1" id="1kxpa" line="5" column="4" file="1">
       <tree node="IDENTIFIER" type="1691" domain="1" id="1kxow" line="5" column="4" file="1">
        <literal>counter</literal>
       </tree>
       <tree node="datatype" type="47" domain="1" id="1kxp0" line="5" column="12" file="1"/>
       <tree node="not_null_option" type="126" domain="1" id="1kxp1" line="5" column="19" file="1"/>
       <tree node="initial_value" type="146" domain="1" id="1kxp8" line="5" column="19" file="1">
        <tree node="logical_disjunction" type="330" domain="1" id="1kxp7" line="5" column="22" file="1">
         <tree node="logical_conjunction" type="332" domain="1" id="1kxp6" line="5" column="22" file="1">
          <tree node="sum" type="356" domain="1" id="1kxp5" line="5" column="22" file="1">
           <tree node="product" type="360" domain="1" id="1kxp4" line="5" column="22" file="1">
            <tree node="power" type="367" domain="1" id="1kxp3" line="5" column="22" file="1">
             <tree node="NATURAL" type="1422" domain="1" id="1kxp2" literal="0" line="5" column="22" file="1"/>
            </tree>
           </tree>
          </tree>
         </tree>
        </tree>
       </tree>
      </tree>
     </tree>
     <tree node="optional_function_or_procedure_declaration_list" type="466" domain="1" id="1kxpc" line="6" column="1" file="1"/>
     <tree node="statement_list" type="473" domain="1" id="1kxrp" children="2" line="7" column="4" file="1">
      <tree node="for_loop_statement" type="680" domain="1" id="1ky26" line="7" column="4" file="1">
       <tree node="IDENTIFIER" type="1691" domain="1" id="1kxpd" line="7" column="8" file="1">
        <literal>i</literal>
       </tree>
       <tree node="logical_disjunction" type="330" domain="1" id="1kxpj" line="7" column="13" file="1">
        <tree node="logical_conjunction" type="332" domain="1" id="1kxpi" line="7" column="13" file="1">
         <tree node="sum" type="356" domain="1" id="1kxph" line="7" column="13" file="1">
          <tree node="product" type="360" domain="1" id="1kxpg" line="7" column="13" file="1">
           <tree node="power" type="367" domain="1" id="1kxpf" line="7" column="13" file="1">
            <tree node="NATURAL" type="1422" domain="1" id="1kxpe" literal="1" line="7" column="13" file="1"/>
           </tree>
          </tree>
         </tree>
        </tree>
       </tree>
       <tree node="logical_disjunction" type="330" domain="1" id="1kxpp" line="7" column="16" file="1">
        <tree node="logical_conjunction" type="332" domain="1" id="1kxpo" line="7" column="16" file="1">
         <tree node="sum" type="356" domain="1" id="1kxpn" line="7" column="16" file="1">
          <tree node="product" type="360" domain="1" id="1kxpm" line="7" column="16" file="1">
           <tree node="power" type="367" domain="1" id="1kxpl" line="7" column="16" file="1">
            <tree node="NATURAL" type="1422" domain="1" id="1kxpk" literal="4" line="7" column="16" file="1"/>
           </tree>
          </tree>
         </tree>
        </tree>
       </tree>
       <tree node="statement_list" type="473" domain="1" id="1kxqh" children="4" line="8" column="7" file="1">
        <tree node="assignment_statement" type="511" domain="1" id="1kxq1" line="8" column="7" file="1">
         <tree node="IDENTIFIER" type="1691" domain="1" id="1kxpq" line="8" column="7" file="1">
          <literal>x</literal>
         </tree>
         <tree node="logical_disjunction" type="330" domain="1" id="1kxpw" line="8" column="12" file="1">
          <tree node="logical_conjunction" type="332" domain="1" id="1kxpu" line="8" column="12" file="1">
           <tree node="sum" type="357" domain="1" id="1kxpt" line="8" column="12" file="1">
            <tree node="sum" type="356" domain="1" id="1kxov" line="8" column="12" file="1">
             <tree node="product" type="360" domain="1" id="1kxoc" line="8" column="12" file="1">
              <tree node="power" type="367" domain="1" id="1kxo8" line="8" column="12" file="1">
               <tree node="IDENTIFIER" type="1691" domain="1" id="1kxo0" line="8" column="12" file="1">
                <literal>x</literal>
               </tree>
              </tree>
             </tree>
            </tree>
            <tree node="product" type="360" domain="1" id="1kxps" line="8" column="16" file="1">
             <tree node="power" type="367" domain="1" id="1kxpr" line="8" column="16" file="1">
              <tree node="NATURAL" type="1422" domain="1" id="1kxou" literal="1000" line="8" column="16" file="1"/>
             </tree>
            </tree>
           </tree>
          </tree>
         </tree>
        </tree>
        <tree node="assignment_statement" type="511" domain="1" id="1kxqg" line="9" column="7" file="1">
         <tree node="IDENTIFIER" type="1691" domain="1" id="1kxq0" line="9" column="7" file="1">
          <literal>counter</literal>
         </tree>
         <tree node="logical_disjunction" type="330" domain="1" id="1kxqd" line="9" column="18" file="1">
          <tree node="logical_conjunction" type="332" domain="1" id="1kxqb" line="9" column="18" file="1">
           <tree node="sum" type="357" domain="1" id="1kxqa" line="9" column="18" file="1">
            <tree node="sum" type="356" domain="1" id="1kxq2" line="9" column="18" file="1">
             <tree node="product" type="360" domain="1" id="1kxo7" line="9" column="18" file="1">
              <tree node="power" type="367" domain="1" id="1kxos" line="9" column="18" file="1">
               <tree node="IDENTIFIER" type="1691" domain="1" id="1kxor" line="9" column="18" file="1">
                <literal>counter</literal>
               </tree>
              </tree>
             </tree>
            </tree>
            <tree node="product" type="360" domain="1" id="1kxq7" line="9" column="28" file="1">
             <tree node="power" type="367" domain="1" id="1kxq4" line="9" column="28" file="1">
              <tree node="NATURAL" type="1422" domain="1" id="1kxq3" literal="1" line="9" column="28" file="1"/>
             </tree>
            </tree>
           </tree>
          </tree>
         </tree>
        </tree>
        <tree node="unlabelled_statement" type="500" domain="1" id="1kxrj" line="10" column="7" file="1">
         <tree node="subordinate_insert_statement" type="652" domain="1" id="1kxri" line="10" column="7" file="1">
          <tree node="table_reference" type="920" domain="1" id="1kxqr" line="10" column="19" file="1">
           <tree node="$NONTERMINALAMBIGUITY" type="1778" nonterminalname="query_table_expression" nonterminaltype="611" domain="1" id="1kxqf" children="2" line="10" column="19" file="1">
            <tree node="query_table_expression" type="946" domain="1" id="1kxqn" line="10" column="19" file="1">
             <tree node="IDENTIFIER" type="1691" domain="1" id="1kxqk" parents="2" line="10" column="19" file="1">
              <literal>temp</literal>
             </tree>
            </tree>
            <tree node="query_table_expression" type="953" domain="1" id="1kxqq" line="10" column="19" file="1">
             <tree node="IDENTIFIER" type="1691" domain="1" id="1kxqk" parents="2" alreadyprinted="true"/>
            </tree>
           </tree>
          </tree>
          <tree node="sql_expression_list" type="657" domain="1" id="1kxrg" line="10" column="32" file="1">
           <tree node="sql_expression_list" type="657" domain="1" id="1kxr9" line="10" column="32" file="1">
            <tree node="disjunction_condition" type="1188" domain="1" id="1kxqy" line="10" column="32" file="1">
             <tree node="conjunction_condition" type="1190" domain="1" id="1kxqx" line="10" column="32" file="1">
              <tree node="additive_expression" type="1243" domain="1" id="1kxqw" line="10" column="32" file="1">
               <tree node="multiplicative_expression" type="1246" domain="1" id="1kxqv" line="10" column="32" file="1">
                <tree node="IDENTIFIER" type="1691" domain="1" id="1kxqu" line="10" column="32" file="1">
                 <literal>x</literal>
                </tree>
               </tree>
              </tree>
             </tree>
            </tree>
            <tree node="disjunction_condition" type="1188" domain="1" id="1kxr8" line="10" column="35" file="1">
             <tree node="conjunction_condition" type="1190" domain="1" id="1kxr7" line="10" column="35" file="1">
              <tree node="additive_expression" type="1243" domain="1" id="1kxr6" line="10" column="35" file="1">
               <tree node="multiplicative_expression" type="1246" domain="1" id="1kxr5" line="10" column="35" file="1">
                <tree node="IDENTIFIER" type="1691" domain="1" id="1kxr4" line="10" column="35" file="1">
                 <literal>counter</literal>
                </tree>
               </tree>
              </tree>
             </tree>
            </tree>
           </tree>
           <tree node="disjunction_condition" type="1188" domain="1" id="1kxrf" line="10" column="44" file="1">
            <tree node="conjunction_condition" type="1190" domain="1" id="1kxre" line="10" column="44" file="1">
             <tree node="additive_expression" type="1243" domain="1" id="1kxrd" line="10" column="44" file="1">
              <tree node="multiplicative_expression" type="1246" domain="1" id="1kxrc" line="10" column="44" file="1">
               <tree node="STRING" type="1556" domain="1" id="1kxrb" line="10" column="44" file="1">
                <literal>outer loop</literal>
               </tree>
              </tree>
             </tree>
            </tree>
           </tree>
          </tree>
          <tree node="optional_returning_clause" type="587" domain="1" id="1kxrh" line="10" column="57" file="1"/>
         </tree>
        </tree>
        <tree node="plsql_block" type="458" domain="1" id="1ky1u" line="12" column="7" file="1">
         <precomment child=" 1" index="1">/* start an inner block */</precomment>
         <tree node="block_body" type="463" domain="1" id="1ky24" line="13" column="10" file="1">
          <tree node="optional_type_or_item_declaration_list" type="465" domain="1" id="1kxz9" line="13" column="10" file="1">
           <tree node="optional_type_or_item_declaration_list" type="464" domain="1" id="1kxrq" line="13" column="10" file="1"/>
           <tree node="item_declaration" type="139" domain="1" id="1kxza" line="13" column="10" file="1">
            <postcomment child="5" index="1">-- this is a local version of x</postcomment>
            <tree node="IDENTIFIER" type="1691" domain="1" id="1kxrn" line="13" column="10" file="1">
             <literal>x</literal>
            </tree>
            <tree node="datatype" type="47" domain="1" id="1kxrr" line="13" column="12" file="1"/>
            <tree node="not_null_option" type="126" domain="1" id="1kxrs" line="13" column="19" file="1"/>
            <tree node="initial_value" type="146" domain="1" id="1kxz5" line="13" column="19" file="1">
             <tree node="logical_disjunction" type="330" domain="1" id="1kxz4" line="13" column="22" file="1">
              <tree node="logical_conjunction" type="332" domain="1" id="1kxrz" line="13" column="22" file="1">
               <tree node="sum" type="356" domain="1" id="1kxry" line="13" column="22" file="1">
                <tree node="product" type="360" domain="1" id="1kxrx" line="13" column="22" file="1">
                 <tree node="power" type="367" domain="1" id="1kxrw" line="13" column="22" file="1">
                  <tree node="NATURAL" type="1422" domain="1" id="1kxrt" literal="0" line="13" column="22" file="1"/>
                 </tree>
                </tree>
               </tree>
              </tree>
             </tree>
            </tree>
           </tree>
          </tree>
          <tree node="optional_function_or_procedure_declaration_list" type="466" domain="1" id="1kxze" line="14" column="7" file="1"/>
          <tree node="for_loop_statement" type="680" domain="1" id="1ky1y" line="15" column="10" file="1">
           <tree node="IDENTIFIER" type="1691" domain="1" id="1kxzf" line="15" column="14" file="1">
            <literal>i</literal>
           </tree>
           <tree node="logical_disjunction" type="330" domain="1" id="1kxzq" line="15" column="19" file="1">
            <tree node="logical_conjunction" type="332" domain="1" id="1kxzn" line="15" column="19" file="1">
             <tree node="sum" type="356" domain="1" id="1kxzk" line="15" column="19" file="1">
              <tree node="product" type="360" domain="1" id="1kxzj" line="15" column="19" file="1">
               <tree node="power" type="367" domain="1" id="1kxzi" line="15" column="19" file="1">
                <tree node="NATURAL" type="1422" domain="1" id="1kxrv" literal="1" line="15" column="19" file="1"/>
               </tree>
              </tree>
             </tree>
            </tree>
           </tree>
           <tree node="logical_disjunction" type="330" domain="1" id="1kxzy" line="15" column="22" file="1">
            <tree node="logical_conjunction" type="332" domain="1" id="1kxzx" line="15" column="22" file="1">
             <tree node="sum" type="356" domain="1" id="1kxzw" line="15" column="22" file="1">
              <tree node="product" type="360" domain="1" id="1kxzv" line="15" column="22" file="1">
               <tree node="power" type="367" domain="1" id="1kxzu" line="15" column="22" file="1">
                <tree node="NATURAL" type="1422" domain="1" id="1kxzt" literal="4" line="15" column="22" file="1"/>
               </tree>
              </tree>
             </tree>
            </tree>
           </tree>
           <tree node="statement_list" type="473" domain="1" id="1ky0t" children="3" line="16" column="13" file="1">
            <tree node="assignment_statement" type="511" domain="1" id="1ky0g" line="16" column="13" file="1">
             <postcomment child="4" index="1">-- this increments the local x</postcomment>
             <tree node="IDENTIFIER" type="1691" domain="1" id="1kxzz" line="16" column="13" file="1">
              <literal>x</literal>
             </tree>
             <tree node="logical_disjunction" type="330" domain="1" id="1ky0c" line="16" column="18" file="1">
              <tree node="logical_conjunction" type="332" domain="1" id="1ky07" line="16" column="18" file="1">
               <tree node="sum" type="357" domain="1" id="1ky06" line="16" column="18" file="1">
                <tree node="sum" type="356" domain="1" id="1ky00" line="16" column="18" file="1">
                 <tree node="product" type="360" domain="1" id="1kxz6" line="16" column="18" file="1">
                  <tree node="power" type="367" domain="1" id="1kxr3" line="16" column="18" file="1">
                   <tree node="IDENTIFIER" type="1691" domain="1" id="1kxop" line="16" column="18" file="1">
                    <literal>x</literal>
                   </tree>
                  </tree>
                 </tree>
                </tree>
                <tree node="product" type="360" domain="1" id="1ky05" line="16" column="22" file="1">
                 <tree node="power" type="367" domain="1" id="1ky04" line="16" column="22" file="1">
                  <tree node="NATURAL" type="1422" domain="1" id="1ky01" literal="1" line="16" column="22" file="1"/>
                 </tree>
                </tree>
               </tree>
              </tree>
             </tree>
            </tree>
            <tree node="assignment_statement" type="511" domain="1" id="1ky0s" line="17" column="13" file="1">
             <tree node="IDENTIFIER" type="1691" domain="1" id="1ky0f" line="17" column="13" file="1">
              <literal>counter</literal>
             </tree>
             <tree node="logical_disjunction" type="330" domain="1" id="1ky0o" line="17" column="24" file="1">
              <tree node="logical_conjunction" type="332" domain="1" id="1ky0m" line="17" column="24" file="1">
               <tree node="sum" type="357" domain="1" id="1ky03" line="17" column="24" file="1">
                <tree node="sum" type="356" domain="1" id="1ky0h" line="17" column="24" file="1">
                 <tree node="product" type="360" domain="1" id="1kxz7" line="17" column="24" file="1">
                  <tree node="power" type="367" domain="1" id="1kxr0" line="17" column="24" file="1">
                   <tree node="IDENTIFIER" type="1691" domain="1" id="1kxpx" line="17" column="24" file="1">
                    <literal>counter</literal>
                   </tree>
                  </tree>
                 </tree>
                </tree>
                <tree node="product" type="360" domain="1" id="1ky02" line="17" column="34" file="1">
                 <tree node="power" type="367" domain="1" id="1ky0l" line="17" column="34" file="1">
                  <tree node="NATURAL" type="1422" domain="1" id="1ky0k" literal="1" line="17" column="34" file="1"/>
                 </tree>
                </tree>
               </tree>
              </tree>
             </tree>
            </tree>
            <tree node="unlabelled_statement" type="500" domain="1" id="1ky1t" line="18" column="13" file="1">
             <tree node="subordinate_insert_statement" type="652" domain="1" id="1ky1s" line="18" column="13" file="1">
              <tree node="table_reference" type="920" domain="1" id="1ky11" line="18" column="25" file="1">
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                <tree node="query_table_expression" type="946" domain="1" id="1ky0x" line="18" column="25" file="1">
                 <tree node="IDENTIFIER" type="1691" domain="1" id="1ky0w" parents="2" line="18" column="25" file="1">
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                </tree>
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                 <tree node="IDENTIFIER" type="1691" domain="1" id="1ky0w" parents="2" alreadyprinted="true"/>
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                 <tree node="conjunction_condition" type="1190" domain="1" id="1ky18" line="18" column="38" file="1">
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                    <tree node="IDENTIFIER" type="1691" domain="1" id="1ky14" line="18" column="38" file="1">
                     <literal>x</literal>
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                 </tree>
                </tree>
                <tree node="disjunction_condition" type="1188" domain="1" id="1ky1i" line="18" column="41" file="1">
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                </tree>
               </tree>
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                   <tree node="STRING" type="1556" domain="1" id="1ky1l" line="18" column="50" file="1">
                    <literal>inner loop</literal>
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                 </tree>
                </tree>
               </tree>
              </tree>
              <tree node="optional_returning_clause" type="587" domain="1" id="1ky1r" line="18" column="63" file="1"/>
             </tree>
            </tree>
           </tree>
           <tree node="end_loop" type="672" domain="1" id="1ky1v" line="19" column="10" file="1"/>
          </tree>
          <tree node="optional_exception_handlers" type="474" domain="1" id="1ky20" line="20" column="7" file="1"/>
         </tree>
        </tree>
       </tree>
       <tree node="end_loop" type="672" domain="1" id="1kxrm" line="21" column="4" file="1"/>
      </tree>
      <tree node="unlabelled_statement" type="500" domain="1" id="1kxro" line="22" column="4" file="1">
       <tree node="subordinate_commit_statement" type="535" domain="1" id="1ky21" line="22" column="4" file="1"/>
      </tree>
     </tree>
     <tree node="optional_exception_handlers" type="474" domain="1" id="1ky1w" line="23" column="1" file="1"/>
    </tree>
   </tree>
  </tree>
  <FileIndex>
   <File index="1">C:/DMS/Domains/PLSQL/Examples/sample.sql</File>
  </FileIndex>
  <DomainIndex>
   <Domain index="1">PLSQL</Domain>
  </DomainIndex>
 </DMSForest>

Answer 2

Я думаю, что я сгенерирую XML (или сделаю дерево XPath пригодным для навигации) и использую XSLT-преобразование для создания любого (текстового) формата, который вам нравится, особенно SVG.