Allow named units to have a LaTeX representation (WIP)

src/amuse/units/core.py

@@ -64,6 +64,8 @@ class unit(object):
 
     Units can also be named, by creating a named unit.
     """
+
+    _latex_representation = None
     __array_priority__ = 100
 
     def __mul__(self, other):
@@ -142,6 +144,12 @@ def __ne__(self, other):
     def __hash__(self):
         return self._hash
 
+    def latex(self):
+        if self._latex_representation is not None:
+            return self._latex_representation
+        else:
+            return self.symbol
+
     @late
     def _hash(self):
         return hash(id(self))
@@ -853,15 +861,16 @@ class named_unit(unit):
     >>> (20.0 | (60.0 * si.s)).as_quantity_in(minute)
     quantity<20.0 min>
     """
-    def __init__(self, name, symbol, unit):
+
+    def __init__(self, name, symbol, unit, latex=None):
         self.name = name
         self.symbol = symbol
         self.local_unit = unit
+        self._latex_representation = latex
 
     def __str__(self):
         return self.symbol
 
-
     def reference_string(self):
         return self.to_simple_form().reference_string()