MWC: make Dummy function placeholders callable to fix build with MSVC

Signed-off-by: Evgeny Malygin <[email protected]>

.gitignore

@@ -26,3 +26,10 @@ settings.json
 .pytest_cache/
 .cache/
 .venv/
+
+# Symlink from 'src/applications/bmqbrkr/run'
+src/applications/bmqbrkr/etc/etc
+
+# 'sim_cpp11_features.pl' backups
+src/groups/mwc/mwcex/*.bak
+src/groups/mwc/mwcu/*.bak

src/groups/mwc/mwcex/mwcex_executor.h

@@ -105,7 +105,6 @@
 //..
 
 // MWC
-
 #include <mwcex_executortraits.h>
 
 // BDE
@@ -293,8 +292,65 @@ class Executor_Box_SboImp {
 
     /// Provides a "small" dummy object which size is used to calculate the
     /// size of the on-stack buffer used to store the executor target.
-    struct Dummy {
+    struct Dummy : public Executor_TargetBase {
         void* d_padding[4];
+
+        bool
+        operator==(BSLS_ANNOTATION_UNUSED const Executor_Box_SboImp::Dummy&)
+            const BSLS_KEYWORD_NOEXCEPT
+        {
+            return false;
+        }
+
+        void post(BSLS_ANNOTATION_UNUSED const bsl::function<void()>& f) const
+            BSLS_KEYWORD_OVERRIDE
+        {
+            // NOTHING
+        }
+
+        /// Perform `ExecutorTraits<E>::dispatch(e, f)`, where `e` is the
+        /// contained executor target of type `E`.
+        void dispatch(BSLS_ANNOTATION_UNUSED const bsl::function<void()>& f)
+            const BSLS_KEYWORD_OVERRIDE
+        {
+            // NOTHING
+        }
+
+        /// Move-construct `*this` into the specified `dst` address.
+        void move(BSLS_ANNOTATION_UNUSED void* dst)
+            BSLS_KEYWORD_NOEXCEPT BSLS_KEYWORD_OVERRIDE
+        {
+            // NOTHING
+        }
+
+        bool equal(BSLS_ANNOTATION_UNUSED const Executor_TargetBase& other)
+            const BSLS_KEYWORD_NOEXCEPT
+        {
+            // NOTHING
+        }
+
+        /// Return a pointer to the contained executor target.
+        void* target() BSLS_KEYWORD_NOEXCEPT
+        {
+            // NOTHING
+        }
+
+        const void* target() const BSLS_KEYWORD_NOEXCEPT
+        {
+            // NOTHING
+        }
+
+        /// Return `typeid(e)`, where `e` is the contained executor target.
+        const bsl::type_info& targetType() const BSLS_KEYWORD_NOEXCEPT
+        {
+            // NOTHING
+        }
+
+        /// Copy-construct `*this` into the specified `dst` address.
+        void copy(BSLS_ANNOTATION_UNUSED void* dst) const BSLS_KEYWORD_NOEXCEPT
+        {
+            // NOTHING
+        }
     };
 
   private:

src/groups/mwc/mwcex/mwcex_future.h

@@ -113,11 +113,11 @@
 // result-supplier thread.
 
 // MWC
-
 #include <mwcu_objectplaceholder.h>
 
 // BDE
 #include <bdlb_nullablevalue.h>
+#include <bdlf_noop.h>
 #include <bsl_algorithm.h>  // bsl::swap
 #include <bsl_exception.h>
 #include <bsl_functional.h>  // bsl::reference_wrapper
@@ -150,7 +150,7 @@
 
 #if BSLS_COMPILERFEATURES_SIMULATE_CPP11_FEATURES
 // Include version that can be compiled with C++03
-// Generated on Wed Jun 29 04:17:13 2022
+// Generated on Wed Jul 17 12:44:45 2024
 // Command line: sim_cpp11_features.pl mwcex_future.h
 #define COMPILING_MWCEX_FUTURE_H
 #include <mwcex_future_cpp03.h>
@@ -232,7 +232,7 @@ class Future_Exception {
 
     /// Provides a "small" dummy object which size is used to calculate the
     /// size of the on-stack buffer used for optimization.
-    struct Dummy {
+    struct Dummy : public bdlf::NoOp {
         void* d_padding[3];
     };
 
@@ -359,7 +359,7 @@ class Future_Callback {
 
     /// Provides a "small" dummy object which size is used to calculate the
     /// size of the on-stack buffer used for optimization.
-    struct Dummy {
+    struct Dummy : public bdlf::NoOp {
         void* d_padding[3];
     };