Treat R^1x1 the same way as R^1 when initializing with 0

src/language/utils/AffectationProcessorBuilder.hpp

@@ -17,9 +17,10 @@ class AffectationProcessorBuilder final : public IAffectationProcessorBuilder
   std::unique_ptr<INodeProcessor>
   getNodeProcessor(ASTNode& lhs_node, ASTNode& rhs_node) const final
   {
-    if constexpr (std::is_same_v<ValueT, TinyVector<1>> and std::is_same_v<DataT, int64_t> and
+    if constexpr ((std::is_same_v<ValueT, TinyVector<1>> or
+                   std::is_same_v<ValueT, TinyMatrix<1>>)and std::is_same_v<DataT, int64_t> and
                   std::is_same_v<OperatorT, language::eq_op>) {
-      // Special treatment for the case 0 -> R^1
+      // Special treatment for the case 0 -> R^1 or 0 -> R^1x1
       if ((rhs_node.is_type<language::integer>()) and (std::stoi(rhs_node.string()) == 0)) {
         return std::make_unique<AffectationFromZeroProcessor<ValueT>>(lhs_node);
       } else {

tests/test_ASTNodeListAffectationExpressionBuilder.cpp

@@ -239,7 +239,7 @@ let (x1,x2,x3,x) : R^1x1*R^2x2*R^3x3*R,
 
       std::string_view result = R"(
 (root:ASTNodeListProcessor)
- +-(language::eq_op:AffectationProcessor<language::eq_op, TinyMatrix<1ul, 1ul, double>, long>)
+ +-(language::eq_op:AffectationFromZeroProcessor<TinyMatrix<1ul, 1ul, double> >)
  |   +-(language::name:a:NameProcessor)
  |   `-(language::integer:0:ValueProcessor)
  +-(language::eq_op:AffectationToTinyMatrixFromListProcessor<language::eq_op, TinyMatrix<2ul, 2ul, double> >)