fix(ffi): Correct clp::ffi::ir_stream::Deserializer::deserialize_next_ir_unit's return value when failing to read the next IR unit's type tag.

[LinZhihao-723]

Description

Before this PR, when the deserializer fails to read the next IR unit's type tag, it returns std::errc::no_message_available. However, this error should be equivalent to incomplete IR stream error, which should be the same with std::errc::result_out_of_range. This PR fixes this issue.
The PR also removed unused includes from Deserializer's header.

Validation performed

• Ensure all workflows passed.

Summary by CodeRabbit

• New Features

  • Enhanced error handling in the deserialization process, providing more specific error codes.
  • Improved granularity of error reporting during data deserialization.

• Documentation

  • Updated comments to clarify the return value descriptions for improved understanding.

[coderabbitai]

Walkthrough

The changes in this pull request focus on enhancing the error handling capabilities within the Deserializer class, specifically in the deserialize_next_ir_unit method. The return type has been modified to allow specific error codes from the deserialize_tag function to propagate, rather than returning a fixed error code. This adjustment improves the granularity of error reporting during the deserialization process. Additionally, comments in the code have been updated to reflect these changes.

Changes

File Path	Change Summary
components/core/src/clp/ffi/ir_stream/Deserializer.hpp	Updated the return type of deserialize_next_ir_unit to forward error codes from deserialize_tag. Adjusted logic for error handling and updated comments accordingly.

Possibly related PRs

• ffi: Redesign Deserializer API to deserialize key-value pair IR streams one IR unit at a time (fixes #539). #549: The changes in this PR redesign the Deserializer API to deserialize key-value pair IR streams one IR unit at a time, which directly relates to the modifications made in the main PR regarding the deserialize_next_ir_unit method and its error handling improvements.
• feat(ffi): Update IR stream protocol version handling in preparation for releasing the kv-pair IR stream format: #573: This PR updates the IR version protocol and enhances the validation method for protocol versions, which is relevant to the error handling and validation improvements made in the deserialize_next_ir_unit method in the main PR.

Suggested reviewers

• davidlion

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📥 Commits

Reviewing files that changed from the base of the PR and between 9154949 and 9353ee6.

📒 Files selected for processing (1)

• components/core/src/clp/ffi/ir_stream/Deserializer.hpp (2 hunks)

🧰 Additional context used

📓 Learnings (1)

components/core/src/clp/ffi/ir_stream/Deserializer.hpp (2)

Learnt from: LinZhihao-723
PR: y-scope/clp#549
File: components/core/src/clp/ffi/ir_stream/Deserializer.hpp:209-210
Timestamp: 2024-10-08T15:52:50.753Z
Learning: Until #486 is merged with customized error code support, introducing a layer from `IRErrorCode` to `std::errc` is unnecessary.

Learnt from: LinZhihao-723
PR: y-scope/clp#549
File: components/core/src/clp/ffi/ir_stream/Deserializer.hpp:209-210
Timestamp: 2024-10-01T07:59:15.290Z
Learning: Until #486 is merged with customized error code support, introducing a layer from `IRErrorCode` to `std::errc` is unnecessary.

🔇 Additional comments (2)

components/core/src/clp/ffi/ir_stream/Deserializer.hpp (2)

68-69: Documentation accurately reflects error propagation.

The updated documentation properly describes that error codes from deserialize_tag are forwarded when tag bytes cannot be read, which aligns with the improved error handling approach.

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174-175: Consider deferring IRErrorCode to std::errc conversion.

Based on previous discussions in PR #549, introducing a conversion layer from IRErrorCode to std::errc was deemed unnecessary until PR #486 is merged with customized error code support. The current changes might introduce inconsistency in error handling.

Consider either:

1. Waiting for PR feat(core): Add ErrorCode template to standardize conversion of user-defined error code enums to std::error_code. #486 to be merged before implementing this conversion, or
2. Documenting why this case warrants an exception to that guideline

Let's verify the status of PR #486:

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[kirkrodrigues]

In the PR description, I guess you mean:

However, this error should be equivalent to incomplete IR stream error, which should be the same with std::errc::no_message_availablestd::errc::result_out_of_range.

[LinZhihao-723]

In the PR description, I guess you mean:

However, this error should be equivalent to incomplete IR stream error, which should be the same with std::errc::no_message_availablestd::errc::result_out_of_range.

Right... my bad