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@@ -1,10 +1,35 @@
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-2015-2-22 version 3.0.0-alpha-2 (Ruby/JavaNano):
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+2015-02-22 version 3.0.0-alpha-2 (Ruby/JavaNano):
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General
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* Introduced two new language implementations (Ruby and JavaNano) to proto3.
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* Various bug fixes since 3.0.0-alpha-1
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Ruby:
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- TODO(cfallin): Add descriptions here.
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+ We have added proto3 support for Ruby via a native C extension.
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+
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+ The Ruby extension itself is included in the ruby/ directory, and details on
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+ building and installing the extension are in ruby/README.md. The extension
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+ will also be published as a Ruby gem. Code generator support is included as
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+ part of `protoc` with the `--ruby_out` flag.
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+
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+ The Ruby extension implements a user-friendly DSL to define message types
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+ (also generated by the code generator from `.proto` files). Once a message
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+ type is defined, the user may create instances of the message that behave in
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+ ways idiomatic to Ruby. For example:
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+
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+ - Message fields are present as ordinary Ruby properties (getter method
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+ `foo` and setter method `foo=`).
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+ - Repeated field elements are stored in a container that acts like a native
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+ Ruby array, and map elements are stored in a container that acts like a
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+ native Ruby hashmap.
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+ - The usual well-known methods, such as `#to_s`, `#dup`, and the like, are
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+ present.
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+
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+ Unlike several existing third-party Ruby extensions for protobuf, this
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+ extension is built on a "strongly-typed" philosophy: message fields and
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+ array/map containers will throw exceptions eagerly when values of the
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+ incorrect type are inserted.
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+
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+ See ruby/README.md for details.
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JavaNano:
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JavaNano is a special code generator and runtime library designed especially
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Chris Fallin