Feat(random): random str parsing is done

mapytex/calculus/core/random/leaf.py

@@ -9,6 +9,46 @@
 """
 
 """
+from ..coroutine import *
+
+
+@coroutine
+def look_for_rdleaf(target):
+    """ Coroutine which look to "{...}" which are RdLeaf
+
+    :example:
+    >>> from ..str2 import list_sink
+    >>> str2list = look_for_rdleaf(list_sink)
+    >>> for i in "{a}+{a*b}-2":
+    ...    str2list.send(i)
+    >>> a = str2list.throw(STOOOP)
+    >>> a
+    [<RdLeaf a>, '+', <RdLeaf a*b>, '-', '2']
+
+    """
+    try:
+        target_ = target()
+    except TypeError:
+        target_ = target
+
+    try:
+        while True:
+            tok = yield
+            if tok == "{":
+                stack = ""
+                stacking = True
+            elif tok == "}":
+                target_.send(RdLeaf(stack))
+                stack = ""
+                stacking = False
+            else:
+                if stacking:
+                    stack += tok
+                else:
+                    target_.send(tok)
+
+    except STOOOP as err:
+        yield target_.throw(err)
 
 
 class RdLeaf:
@@ -25,10 +65,10 @@ class RdLeaf:
         return self._name
 
     def replace(self, computed):
-        return computed[self.name]
+        return computed[self._name]
 
     def __str__(self):
-        return "{" + self.name + "}"
+        return "{" + self._name + "}"
 
     def __repr__(self):
-        return f"<{self.__class__.__name__} {self.__str__}>"
+        return f"<{self.__class__.__name__} {self._name}>"