Generate East-oriented forwarders as source for zero-alloc delegation#55
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Hoist the ivar-vs-method branch to definition time and generate the forwarding method with (...) argument forwarding plus literal receiver lookup and send. Forwarded calls now allocate zero objects and run ~2.8x-5x faster on Ruby 4.0 (Object Shapes / YJIT friendly) versus the previous define_method + __send__ approach. Setter and operator method names fall back to define_method. Raise required_ruby_version to >= 3.2, pin dev to 4.0.5, add Ruby 4.0 to CI, and cover keyword/operator forwarding with tests.
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Hoist the ivar-vs-method branch to definition time and generate the forwarding method with (...) argument forwarding plus literal receiver lookup and send. Forwarded calls now allocate zero objects and run ~2.8x-5x faster on Ruby 4.0 (Object Shapes / YJIT friendly) versus the previous define_method + send approach. Setter and operator method names fall back to define_method.
Raise required_ruby_version to >= 3.2, pin dev to 4.0.5, add Ruby 4.0 to CI, and cover keyword/operator forwarding with tests.