feat: Base data structures fot hook implementation.

[NeaguGeorgiana23]

This PR

Introduces HookHints and FlagTypeValus that will allow later implementation of Hooks.

Related Issues

Fixes #111

Follow-up Tasks

Implementing the EvaluationOptions and HookData.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: d586a8af-f048-4310-a1aa-867e9879e169

📥 Commits

Reviewing files that changed from the base of the PR and between 5cc878b and bd66430.

📒 Files selected for processing (1)

• openfeature/flag_type_value.h

📝 Walkthrough

Walkthrough

This PR adds the FlagValueType enum class and HookHints type alias to the OpenFeature C++ SDK, along with header-only Bazel targets exposing both new headers.

Changes

New Type Definitions

Layer / File(s)	Summary
FlagValueType enum openfeature/flag_type_value.h, openfeature/BUILD	Defines openfeature::FlagValueType with boolean, string, integer, double, and object variants, and adds its header-only Bazel target.
HookHints type alias openfeature/hook_hints.h, openfeature/BUILD	Defines openfeature::HookHints as an std::unordered_map<std::string, std::any> alias and adds its header-only Bazel target.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	Issue #111 also requires EvaluationOption and HookData, but this PR only adds HookHints and FlagValueType.	Add the remaining EvaluationOption and HookData implementations, or narrow the linked issue to HookHints only.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the PR's main change: base data structures for hook implementation.
Description check	✅ Passed	The description matches the PR and mentions HookHints, FlagTypeValus, and follow-up hook work.
Out of Scope Changes check	✅ Passed	The new headers and BUILD targets align with the hook data-structure work and add no unrelated changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[Copilot]

Pull request overview

Adds foundational public types to support a future Hooks implementation in the OpenFeature C++ SDK, aligning with Issue #111’s “Hook hints” portion and preparing for later HookData/EvaluationOptions work.

Changes:

• Introduces HookHints as a std::unordered_map<std::string, std::any> type alias.
• Introduces FlagValueType enum to represent supported flag value categories.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
openfeature/hook_hints.h	Adds the HookHints type alias for passing arbitrary hook hint data.
openfeature/flag_type_value.h	Adds the FlagValueType enum for flag value categorization.

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