From 08abb38f46a29fa4040db1ac0b9fd08452438258 Mon Sep 17 00:00:00 2001
From: Julien Michel <julien.michel@cnes.fr>
Date: Tue, 11 Dec 2018 14:42:44 +0100
Subject: [PATCH] ENH: Add another New() implementation enabled for non default
construcible TFunctor so as to get a nice warning (thanks to @aregimbeau for
the patch)
---
Modules/Core/Functor/include/otbFunctorImageFilter.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/Modules/Core/Functor/include/otbFunctorImageFilter.h b/Modules/Core/Functor/include/otbFunctorImageFilter.h
index 06de75fa13..7052bcc222 100644
--- a/Modules/Core/Functor/include/otbFunctorImageFilter.h
+++ b/Modules/Core/Functor/include/otbFunctorImageFilter.h
@@ -310,6 +310,17 @@ public:
p->UnRegister();
return p;
}
+
+ /** New() macro defined only if TFunction is NOT default constructible
+ * This will yield an error message since New() can not be implemented in this case. */
+ template <typename F = TFunction> static std::enable_if_t<!std::is_default_constructible<F>::value, Pointer> New()
+ {
+ static_assert(std::is_default_constructible<F>::value,"Cannot call New() "
+ "methode as the functor used for the filter creation is not default "
+ "constructible");
+
+ return nullptr;
+ }
/** Get the functor object.
*
--
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