C++-generating back end: dependent multi-dimensional subscripts

[wchilders-nvidia]

Issue Summary

In cases in which template definitions are generated from the prototype instantiation IL, when a dependent multi-dimensional subscript operation appears in a template definition, the C++-generating back end emits only the first subscript.

Reproducing Source Code

repro.cpp

Command-line Options

cpfe-cp --c++23

Type of Issue

[Back End] There is a problem with the generated C++ code.

Additional Details

No response

Reproducing (Standard) Configuration(s)

linux-gcc-debug

Reproducing (Non-standard) Configuration

No response

I acknowledge that:

• I have checked open issues and existing discussions before filing this report.
• The reproducing source code that I have provided does not depend on headers that I have not included with my submission.
• I have reduced the reproducing source code to the best of my ability.
• I have selected at least one standard configuration or uploaded a non-standard configuration dump.
• I understand code shared via this form is NOT confidential.
• I have permission to share the reproducing source code and grant permission for the project to use the source code (or derivatives of the source code) to create tests.
• I agree that any tests created using the reproducing source code (or deriatives of it) will be licensed under project license unless I included a LICENSE.txt file in my .zip or .tar.gz upload. If I included a LICENSE.txt file, any tests created using the reproducing source code will be governed by the terms of the license I provided instead.