From fb5c32f0ad0ea96c23d6f321d048ce0b82630a48 Mon Sep 17 00:00:00 2001
From: "Salvador E. Tropea" <salvador@inti.gob.ar>
Date: Thu, 25 Jun 2020 08:09:39 -0300
Subject: [PATCH] Added negative numbers support to the document macro.

---
 kiplot/macros.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kiplot/macros.py b/kiplot/macros.py
index 4baf01d1..a0b0acb2 100644
--- a/kiplot/macros.py
+++ b/kiplot/macros.py
@@ -1,4 +1,4 @@
-from ast import (Assign, Name, Attribute, Expr, Num, Str, NameConstant, Load, Store)
+from ast import (Assign, Name, Attribute, Expr, Num, Str, NameConstant, Load, Store, UnaryOp, USub)
 
 
 def document(sentences, to_source, **kw):
@@ -39,6 +39,9 @@ def document(sentences, to_source, **kw):
             type_hint = ''
             if isinstance(value, Num):
                 type_hint = '[number={}]'.format(value.n)
+            elif isinstance(value, UnaryOp) and isinstance(value.operand, Num) and isinstance(value.op, USub):
+                # -Num
+                type_hint = '[number={}]'.format(-value.operand.n)
             elif isinstance(value, Str):
                 type_hint = "[string='{}']".format(value.s)
             elif isinstance(value, NameConstant) and isinstance(value.value, bool):