Add pluggable regex engine support

[rayokota]

No description provided.

[Copilot]

Pull request overview

This PR introduces a pluggable regex layer to jsonata-cpp by replacing direct std::regex usage in JSONata evaluation with an engine-agnostic IRegex interface, allowing alternative engines (e.g., RE2) to be injected while keeping the default behavior equivalent to the existing std::regex implementation.

Changes:

• Add IRegex / RegexEngine abstractions plus a default StdRegex implementation and wire regex literal compilation through the injected engine.
• Update evaluator/runtime regex paths ($match, $contains, $replace, $split, regex-as-function application) to work with std::shared_ptr<IRegex> instead of std::regex.
• Add an optional RE2-backed test target demonstrating a non-std::regex engine integration.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
test/RE2EngineTest.cpp	Adds RE2-based integration tests for regex behavior with an injected engine.
test/RE2Engine.h	Declares a test-only RE2-backed IRegex implementation and engine factory.
test/RE2Engine.cpp	Implements the RE2-backed IRegex adapter and engine factory.
src/jsonata/utils/Signature.cpp	Updates signature/type detection to treat regex values as shared_ptr<IRegex>.
src/jsonata/Tokenizer.cpp	Compiles regex literals via RegexEngine and parses flags into RegexFlags.
src/jsonata/StdRegex.cpp	Adds the default std::regex-backed IRegex implementation and defaultRegexEngine().
src/jsonata/Parser.cpp	Threads RegexEngine into parsing/tokenization.
src/jsonata/Jsonata.cpp	Stores and propagates RegexEngine; updates regex application logic to use IRegex.
src/jsonata/Functions.cpp	Ports regex-related functions to IRegex and compiles dynamic string patterns via the current engine.
include/jsonata/utils/Signature.h	Includes IRegex so regex values can be recognized in signatures.
include/jsonata/Tokenizer.h	Updates tokenizer API to accept/store a RegexEngine and return compiled IRegex.
include/jsonata/StdRegex.h	Declares the StdRegex IRegex adapter.
include/jsonata/Parser.h	Extends parse() signature to accept a RegexEngine.
include/jsonata/Jsonata.h	Extends constructors/factory to accept a RegexEngine and exposes getRegexEngine().
include/jsonata/IRegex.h	Introduces IRegex, RegexMatch, RegexFlags, RegexEngine, and defaultRegexEngine().
include/jsonata/Functions.h	Updates regex function signatures to use shared_ptr<IRegex>.
CMakeLists.txt	Adds optional JSONATA_BUILD_RE2_TEST target that links RE2 when available.

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 22 out of 22 changed files in this pull request and generated 1 comment.