Improve exception message when trying to read list property as scalar

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
cpp
Domain
tooling

Research direction

Start by tracing the getProperty<uint32_t>("vertex_index") call for list properties and follow the exception path that produces the coercion message. Check how list element types are reported and converted, then confirm the behavior with a focused parser test covering a uint16/uint32 list property and scalar access.

Written by the indexing model from the issue text.

Description

enhancement

I have a custom element with a list property:

element track 572
property list uint16 uint32 vertex_index

When trying to read it via:

const std::vector<uint32_t> track_ids = tracks.getElement("track").getProperty<uint32_t>("vertex_index");

I am getting the exception:

PLY parser: property vertex_index cannot be coerced to requested type uint. Has type unit

which is a bit confusing, since it detects the correct type (Has type unit) but fails to convert the type to the same type (cannot be coerced to requested type uint).

Is this a bug in the conversion, or is the uint32 type just not supported?

Dominant language
C++
Stars
406
Forks
74
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