macro: Fix handling of 'continue' inside macros

Fixes: #17677

Source/cmMacroCommand.cxx

@@ -136,6 +136,10 @@ bool cmMacroHelperCommand::operator()(
       inStatus.SetBreakInvoked();
       return true;
     }
+    if (status.GetContinueInvoked()) {
+      inStatus.SetContinueInvoked();
+      return true;
+    }
     if (status.HasExitCode()) {
       inStatus.SetExitCode(status.GetExitCode());
       return true;

Tests/RunCMake/continue/ContinueInMacro-stdout.txt

@@ -0,0 +1,7 @@
+-- start
+-- 1 before continue
+-- 2 before continue
+-- 3 before continue
+-- 4 before continue
+-- 5 before continue
+-- end

Tests/RunCMake/continue/ContinueInMacro.cmake

@@ -0,0 +1,11 @@
+macro(wrapped_continue)
+  continue()
+endmacro()
+
+message(STATUS "start")
+foreach(iter RANGE 1 5)
+  message(STATUS "${iter} before continue")
+  wrapped_continue()
+  message(STATUS "${iter} after continue")
+endforeach()
+message(STATUS "end")

Tests/RunCMake/continue/RunCMakeTest.cmake

@@ -4,6 +4,7 @@ run_cmake(ContinueForeach)
 run_cmake(ContinueForEachInLists)
 run_cmake(ContinueNestedForeach)
 run_cmake(ContinueWhile)
+run_cmake(ContinueInMacro)
 run_cmake(NoArgumentsToContinue)
 run_cmake(NoEnclosingBlock)
 run_cmake(NoEnclosingBlockInFunction)