- slight adjustments

DHParser/ebnf.py

@@ -1006,8 +1006,9 @@ class EBNFCompiler(Compiler):
         elif key == 'drop':
             check_argnum(2)
             for child in node.children[1:]:
-                node_type = child.content.lower()
-                assert node_type in DROP_VALUES, child.content
+                content = child.content
+                node_type = content.lower()
+                assert node_type in DROP_VALUES, content
                 self.directives[key].add(node_type)
 
         elif key == 'ignorecase':
@@ -1190,8 +1191,8 @@ class EBNFCompiler(Compiler):
                             if len(symlist) == 1:
                                 nd = symlist[0].children[1]
                             break
-                    if (nd.tag_name != "regexp" or nd.content[:1] != '/'
-                            or nd.content[-1:] != '/'):
+                    content = nd.content
+                    if (nd.tag_name != "regexp" or content[:1] != '/' or content[-1:] != '/'):
                         self.tree.new_error(node, "Lookbehind-parser can only be used with RegExp"
                                             "-parsers, not: " + nd.tag_name)
 

DHParser/syntaxtree.py

@@ -198,9 +198,10 @@ class Node:  # (collections.abc.Sized): Base class omitted for cython-compatibil
             errors = root.errors_sorted
             if errors:
                 e_pos = errors[0].pos
-                return self.content[:e_pos] + \
+                content = self.content
+                return content[:e_pos] + \
                    ' <<< Error on "%s" | %s >>> ' % \
-                   (self.content[e_pos - self.pos:], '; '.join(e.message for e in errors))
+                   (content[e_pos - self.pos:], '; '.join(e.message for e in errors))
         return self.content
 
     def __repr__(self):
@@ -376,8 +377,8 @@ class Node:  # (collections.abc.Sized): Base class omitted for cython-compatibil
         """
         return ''.join(self._content())
         ## unoptimized
-        # return "".join(child.content for child in self.children) if self.children else str(
-        # self._result)
+        # return "".join(child.content for child in self.children) if self.children \
+        #     else str(self._result)
         ## obsolete
         # if self._content is None:
         #     if self.children: