Update comments and documentation, add more correctness checks.

Documentation/html/class_node-members.html

@@ -69,26 +69,27 @@
 <p>This is the complete list of members for <a class="el" href="class_node.html">Node</a>, including all inherited members.</p>
 <table class="directory">
   <tr class="even"><td class="entry"><a class="el" href="class_node.html#a04226ce946e78244480c5663243b36c7">add_child</a>(Node *child)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#a8557bfd8ff3979e326611dd919f1987d">copy</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a3e8e9b94393fe955cb5ade8a5382302c">cut_child</a>(int child_ind)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#ab40dfec4e2131e0222d53a72421b4d19">derivate</a>(char *var_name)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a364762a99a068e11dda8418f605ed7be">export_dot</a>(int fd, char *graph_name=NULL)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#aaf15ecede43472bafa027b9406239161">export_tex</a>(int fd)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a9705e4699fe55d3e642d87d572663127">get_children_number</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#afcb6228f4f113c5542e87e7a800ede78">get_childs</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#ad50da273cae2a60eb58b75c825554979">get_name</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#a0ecc6c4c82f802f31f75e2cd2c672060">get_name_len</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a17f96910f506ed2c1306546a8ed1ee6a">get_operation</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#afe731d3b0751b737af60bf3b4bb7bb36">get_val</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a396cc8bb42acbda2ca75a30a03d35001">get_value</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#a59a543130a10c95f1e8642cf8c5645e8">id</a></td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"><span class="mlabel">static</span></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#ae2bfcbddacca90a8891f9ac6503e6cb7">is_constant</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#ae1b5533d3d3b4b8f3db0c5ae46b7877b">Node</a>(int _operation)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#aa4286a5fb481fa5c210f4c103e7d674e">Node</a>(int _operation, char *name)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#a024d24b53e4fff070d6c38381bfa4cd8">Node</a>(double _value)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a619a9077025c8f8cb8dc86d5f2bdcece">simplify</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="class_node.html#a89fc96be20dc54286a29a2876ed04296">tree_eq</a>(Node *other)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
-  <tr class="even"><td class="entry"><a class="el" href="class_node.html#aa0840c3cb5c7159be6d992adecd2097c">~Node</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#ac1bf7674e480dee74f3e00afadae87ea">change_operation</a>(int new_operation)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a8557bfd8ff3979e326611dd919f1987d">copy</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#a3e8e9b94393fe955cb5ade8a5382302c">cut_child</a>(int child_ind)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#ab40dfec4e2131e0222d53a72421b4d19">derivate</a>(char *var_name)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#a364762a99a068e11dda8418f605ed7be">export_dot</a>(int fd, char *graph_name=NULL)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#aaf15ecede43472bafa027b9406239161">export_tex</a>(int fd)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#a9705e4699fe55d3e642d87d572663127">get_children_number</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#afcb6228f4f113c5542e87e7a800ede78">get_childs</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#ad50da273cae2a60eb58b75c825554979">get_name</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a0ecc6c4c82f802f31f75e2cd2c672060">get_name_len</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#a17f96910f506ed2c1306546a8ed1ee6a">get_operation</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#afe731d3b0751b737af60bf3b4bb7bb36">get_val</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#a396cc8bb42acbda2ca75a30a03d35001">get_value</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a59a543130a10c95f1e8642cf8c5645e8">id</a></td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"><span class="mlabel">static</span></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#ae2bfcbddacca90a8891f9ac6503e6cb7">is_constant</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#ae1b5533d3d3b4b8f3db0c5ae46b7877b">Node</a>(int _operation)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#aa4286a5fb481fa5c210f4c103e7d674e">Node</a>(int _operation, char *name)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a024d24b53e4fff070d6c38381bfa4cd8">Node</a>(double _value)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#a619a9077025c8f8cb8dc86d5f2bdcece">simplify</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_node.html#a89fc96be20dc54286a29a2876ed04296">tree_eq</a>(Node *other)</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="class_node.html#aa0840c3cb5c7159be6d992adecd2097c">~Node</a>()</td><td class="entry"><a class="el" href="class_node.html">Node</a></td><td class="entry"></td></tr>
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