natvis (works with VisualStudio 2022)

[viable-alternative]

natvis for Visual Studio. (Requires PR#134 to compile)

• Open test/natvis/natvis_demo.sln with visual studio 2022
• Set breakpoint on line 51 of main.cpp and see how the maps look in the debugger.

(Screenshots attached)

[martinus]

Hi, I unfortunately can't properly review this because I don't have windows. I ran it through an Claude 4.5, and it found these issues:

🐛 Critical Bug Found
Line 76 in unordered_dense.natvis - There's an index bug in the segmented_map visualizer:

<Item Name="[{idx1*m_values.num_elements_in_block + idx2}] ({idx1}x{idx2}) {m_values.m_blocks[idx1][idx2].first}">m_values.m_blocks[0][idx2].second</Item>

The value part uses m_values.m_blocks[0][idx2] but it should use m_values.m_blocks[idx1][idx2] to match the key part. Currently, it always shows values from block 0, which would display incorrect values for elements in blocks 1+.

The same issue exists in line 34 for segmented_set

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Before I can merge this, is can you remove the hardcoded versions in the file? If not then you need to update the lint-version.py file to detect these, so they are not forgotten when updating the version.