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59 lines
2.2 KiB
Plaintext
59 lines
2.2 KiB
Plaintext
GF 3.0
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Krasimir Angelov, Björn Bringert, and Aarne Ranta
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GF Version 3.0 is a major revision of GF. The source language is a superset of the
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language in 2.9, which means backward compatibility. But the target languages, the
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compiler implementation, and the functionalities (e.g. the shell) have undergone
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radical changes.
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The release of GF 3.0 is projected for 27 June. As usual, the developing sources
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are available all the time via Darcs.
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==New features==
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Here is a summary of the main novelties visible to the user:
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- **Size**: the source code and the executable binary size have gone
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down to about the half of 2.9.
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- **Portability**: the new back end format PGF (Portable Grammar Format) is
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much simpler than the old GFC format, and therefore easier to port to new
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platforms.
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- **Multilingual web page support**: as an example of portability, GF 3.0 provides a
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compiler from PGF to JavaScript. There are also JavaScript libraries for creating
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translators and syntax editors as client-side web applications.
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- **Incremental parsing**: there is a possibility of word completion when
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input strings are sent to the parser.
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- **Application programmer's interfaces**: both source-GF and PGF formats,
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the shell, and the compiler are accessible via high-level APIs.
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- **Resource library version 1.4**: more coverage, more languages; some of
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the new GF language features are exploited.
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==Non-supported features==
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There are some features of GF 2.9 that will //not// work in the 2.7 June release.
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- Java Editor GUI: we now see the JavaScript editor as the main form of
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syntax editing.
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- Pre-module multi-file grammar format: the grammar format of GF before version 2.0
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is still supported, but its include mechanism is not; this means that grammars
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consisting of multiple files have to be concatenated before use.
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- Probabilistic GF grammars.
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- Some output formats: LBNF.
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- Some GF shell commands: while the main ones will be supported with their familiar
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syntax and options, some old commands have not been included.
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Users who want to have these features are welcome to contact us,
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and even more welcome to contribute code that restores them!
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==GF language extensions==
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Operations for defining patterns.
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Inheritance of overload groups.
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