Internal change

sair_base.td

@@ -28,6 +28,8 @@ def SairDialect : Dialect {
     loosing the high-level structure of the code (hence the "additive" part of
     the name).
   }];
+
+  let cppNamespace = "::sair";
 }
 
 //===----------------------------------------------------------------------===//

sair_ops.cc

@@ -1378,7 +1378,7 @@ llvm::SmallBitVector SairFbyOp::MustFuseDimensions(int sair_operand) {
   return mask;
 }
 
+}  // namespace sair
+
 #define GET_OP_CLASSES
 #include "sair_ops.cc.inc"
-
-}  // namespace sair

sair_ops.h

@@ -36,10 +36,12 @@ namespace sair {
 // `second`.
 OperandRange ChainOperandRanges(OperandRange first, OperandRange second);
 
-using namespace mlir;  // NOLINT - Required by the MLIR infrastructure.
+}  // namespace sair
+
 #define GET_OP_CLASSES
 #include "sair_ops.h.inc"
 
+namespace sair {
 // Parses the declaration of an iteration domain. Appends the dimensions that
 // compose the domain to 'dimensions' and their names to 'dim_names' with the
 // name that the domain binds to each dimension. The syntax for iteration