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Getting rid of [dcc32 Warning] W1029 Duplicate constructor ‘ClassName.ConstructorName’ with identical parameters will be inacessible from C++

Posted by jpluimers on 2017/11/30

Note that the below solution works for any project raising the W1029 warning (not just from projects using Delphi Mocks) like

[dcc32 Warning] W1029 Duplicate constructor 'ClassName.ConstructorName' with identical parameters will be inacessible from C++

From my original text at [WayBack] Get rid of W1029 warning in Delphi compile mode · Issue #106 · VSoftTechnologies/Delphi-Mocks · GitHub:

By default the compiler will emit warnings like these for projects when using either of the Delphi.Mocks.Behavior or Delphi.Mocks.Expectation directly or indirectly:

[dcc32 Warning] W1029 Duplicate constructor 'TExpectation.CreateOnceWhen' with identical parameters will be inacessible from C++

They’re harmless as DUnitX doesn’t support C++. This particular warning type cannot be disabled on the unit or source line level which means you have to disable it on the project level by either:

  1. adding {$WARN DUPLICATE_CTOR_DTOR OFF} anywhere to your .dpr project file
  2. modifying the the Project Options for your project (easiest is in the All configurations - All platforms target):
    1. follow the path Delphi Compiler, Hints and Warnings in the treeview on the left
    2. expand the Output warnings node in the listview on the right
    3. set Duplicate constructor/destructor with identical parameters will be inacessible from C++ to Error

A screenshot of the second option is below.

Note that the spelling mistake in Duplicate constructor/destructor with identical parameters will be inacessible from C++ is how it is in the IDE, but that as Google search string it will give limited results, so here are some back-ground references:

Screenshot of the Project Options

–jeroen

This entry was posted on 2017/11/30 at 06:00 and is filed under Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi 2007, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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