From a5b63521883c633589f330aebef9713c47fda427 Mon Sep 17 00:00:00 2001
From: Emmanuel Garette <egarette@cadoles.com>
Date: Sun, 16 May 2021 06:51:33 +0200
Subject: [PATCH] calc_value: join with multi

---
 tiramisu/function.py | 41 +++++++++++++++++++++++++++++++++--------
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/tiramisu/function.py b/tiramisu/function.py
index 6091530..447b186 100644
--- a/tiramisu/function.py
+++ b/tiramisu/function.py
@@ -333,14 +333,39 @@ class CalcValue:
                         value = value[index]
                     else:
                         value = None
-        elif None in value and not allow_none:
-            value = []
-        elif remove_duplicate_value:
-            new_value = []
-            for val in value:
-                if val not in new_value:
-                    new_value.append(val)
-            value = new_value
+        else:
+            if join is not None:
+                if None not in value:
+                    length_val = None
+                    for val in value:
+                        if isinstance(val, list):
+                            if None in val:
+                                length_val = None
+                                break
+                            lval = len(val)
+                            if length_val is not None and length_val != lval:
+                                raise ValueError(_(f'unexpected value in calc_value with join attribute "{val}" with invalid length "{length_val}"'))
+                            length_val = lval
+                    new_value = []
+                    for idx in range(length_val):
+                        idx_val = []
+                        for val in value:
+                            if isinstance(val, list):
+                                idx_val.append(val[idx])
+                            else:
+                                idx_val.append(val)
+                        new_value.append(join.join(idx_val))
+                    value = new_value
+                else:
+                    value = []
+            elif None in value and not allow_none:
+                value = []
+            elif remove_duplicate_value:
+                new_value = []
+                for val in value:
+                    if val not in new_value:
+                        new_value.append(val)
+                value = new_value
         return value
 
     def value_from_kwargs(self,