- **labels**:  --> Fixed_2_21_0
- **status**: Started --> Fixed
- **Patch**: push -->  
- **Comment**:

commit d73989ffe3a74393a6bc034291248bf888c96d69 (HEAD -> 
pushed/issue-5402-paper-column-get-bound, origin/staging)
Author: Dan Eble <[email protected]>
Date:   Sat Jun 9 13:20:45 2018 -0400

    Issue 5402/2: Arrange for System::get_bound to return a Paper_column
    
    Enforce that only Paper_columns may be set as bounds of Systems.
    Whether an Item and a Spanner can be linked depends on the specific
    type of each, so we use two virtual function calls to simulate
    multiple dispatch.
    
    This is part of a campaign to preserve more type information in the
    C++ code, with the goal of reducing the amount of run-time type
    checking and conditional code.

commit c804c8f09b7a9c64e35ebeee44e947cd6ce729e3
Author: Dan Eble <[email protected]>
Date:   Fri Jun 29 22:24:38 2018 -0400

    Issue 5402/1: Grob: unfriend Spanner




---

** [issues:#5402] Arrange for System::get_bound to return a Paper_column**

**Status:** Fixed
**Labels:** Fixed_2_21_0 
**Created:** Fri Aug 17, 2018 03:14 AM UTC by Dan Eble
**Last Updated:** Thu Aug 23, 2018 10:29 AM UTC
**Owner:** Dan Eble


Arrange for System::get_bound to return a Paper_column

Enforce that only Paper_columns may be set as bounds of Systems.
Whether an Item and a Spanner can be linked depends on the specific
type of each, so we use two virtual function calls to simulate
multiple dispatch.

This is part of a campaign to preserve more type information in the
C++ code, with the goal of reducing the amount of run-time type
checking and conditional code.

http://codereview.appspot.com/342240043


---

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