Fix(Core): bug with nested tree and parsing parenthesis

mapytex/calculus/core/str2.py

@@ -612,6 +612,14 @@ def str2(sink, convert_to_mo=True):
     >>> t = str2nestedlist(exp)
     >>> print(t)
     [1, '+', 3, '*', 'x', '^', 2]
+    >>> exp = "1+(3+4)*2"
+    >>> t = str2nestedlist(exp)
+    >>> print(t)
+    [1, '+', [3, '+', 4], '*', 2]
+    >>> exp = "6x + (8 + 3) * x"
+    >>> t = str2nestedlist(exp)
+    >>> print(t)
+    [6, '*', 'x', '+', [8, '+', 3], '*', 'x']
 
     >>> from .tree import MutableTree
     >>> str2tree = str2(MutableTree.sink)
@@ -683,6 +691,17 @@ def str2(sink, convert_to_mo=True):
      | > +
      | | > 3
      | | > 4
+    >>> exp = "1+(3+4)*2"
+    >>> t = str2tree(exp)
+    >>> print(t)
+    +
+     > 1
+     > *
+     | > +
+     | | > 3
+     | | > 4
+     | > 2
+
     >>> exp = "2*4-1"
     >>> t = str2tree(exp)
     >>> print(t)

mapytex/calculus/core/tree.py

@@ -934,6 +934,18 @@ class MutableTree(Tree):
          | | > 2
          | | > 3
          | > 4
+        >>> t = MutableTree.from_str("6x + (8 + 3) * x")
+        >>> print(t)
+        +
+         > *
+         | > 6
+         | > x
+         > *
+         | > +
+         | | > 8
+         | | > 3
+         | > x
+
         """
         str_2_mut_tree = str2(cls.sink, convert_to_mo)
         return str_2_mut_tree(expression)
@@ -977,21 +989,25 @@ class MutableTree(Tree):
          | > 1
          > 2
         >>> sink = MutableTree.sink()
-        >>> for i in ["1", "+", "2", "*", "x", "^", "3"]:
+        >>> for i in ["1", "+", "2"]:
+        ...    sink.send(i)
+        >>> t = sink.throw(STOOOP)
+        >>> sink = MutableTree.sink()
+        >>> for i in ["1", "+", t, "*", 5]:
         ...    sink.send(i)
         >>> a = sink.throw(STOOOP)
         >>> print(a)
         +
          > 1
          > *
-         | > 2
+         | > +
-         | > ^
+         | | > 1
-         | | > x
+         | | > 2
-         | | > 3
+         | > 5
-
 
         """
         ans = cls()
+        nested_tree = None
         try:
             while True:
                 c = yield
@@ -1001,12 +1017,33 @@ class MutableTree(Tree):
                             ans.set_node(c)
                         except ValueError:
                             if OPERATORS[c]["precedence"] > OPERATORS[ans.node]["precedence"]:
+                                # the operation has to be done first
+                                if nested_tree is not None:
+                                    b_tree = cls(c, nested_tree, None)
+                                    nested_tree = None
+                                    ans.append(b_tree)
+                                else:
                                     ans.append_bot(c)
                             else:
+                                if nested_tree is not None:
+                                    ans.append(nested_tree)
+                                    nested_tree = None
                                 ans.append_top(c)
                         else:
+                            if nested_tree is not None:
+                                ans.set_left_value(nested_tree)
+                                nested_tree = None
+
+                    else:
+                        try:
+                            c.node
+                        except AttributeError:
                             ans.append(c)
+                        else:
+                            nested_tree = c
         except STOOOP:
+            if nested_tree is not None:
+                ans.append(nested_tree)
             yield ans
 
     def set_node(self, value):
@@ -1136,7 +1173,7 @@ class MutableTree(Tree):
         else:
             self.set_right_value(value)
 
-    def append_top(self, value):
+    def append_top(self, node):
         """ Append node into the tree at the top
 
         :example:
@@ -1151,14 +1188,15 @@ class MutableTree(Tree):
          > None
         """
 
+        #self_cp = MutableTree.from_any_tree(self)
         self_cp = MutableTree()
         self_cp.set_node(self.node)
         self_cp.set_left_value(self.left_value)
         self_cp.set_right_value(self.right_value)
 
-        self.left_value, self.node, self.right_value = self_cp, value, None
+        self.left_value, self.node, self.right_value = self_cp, node, None
 
-    def append_bot(self, value):
+    def append_bot(self, node):
         """ Append node into the tree at the bottom right_value
 
         :example:
@@ -1192,13 +1230,13 @@ class MutableTree(Tree):
 
         rv = self.right_value
         try:
-            if value == rv.node:
+            if node == rv.node:
-                rv.append_top(value)
+                rv.append_top(node)
             else:
-                rv.append_bot(value)
+                rv.append_bot(node)
         except AttributeError:
             nright_value = MutableTree()
-            nright_value.set_node(value)
+            nright_value.set_node(node)
             nright_value.set_left_value(rv)
 
             self.right_value = nright_value
@@ -1607,6 +1645,10 @@ class AssocialTree(Tree):
 
         return tree
 
+if __name__ == "__main__":
+    a = MutableTree.from_str("(1+2)*3")
+    print(a)
+
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