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freebsd-ports/lang/twelf/pkg-descr
Edwin Groothuis 70b1179c61 New port: lang/twelf A meta-logical framework for deductive systems
The Twelf implementation comprises
	 * the LF logical framework, including type reconstruction;
	 * the Elf constraint logic programming language;
	 * an inductive meta-theorem prover for LF;
	 * and an Emacs interface.

PR:		ports/84625
Submitted by:	"Andrew Bernard" <andrew@hobnob.com>
2005-11-26 12:49:47 +00:00

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The Twelf implementation comprises
* the LF logical framework, including type reconstruction;
* the Elf constraint logic programming language;
* an inductive meta-theorem prover for LF;
* and an Emacs interface.
Twelf provides a uniform meta-language for specifying,
implementing, and proving properties of programming languages
and logics. Example suites include Cartesian Closed Categories
and lambda-calculus, the Church-Rosser theorem for the untyped
lambda-calculus, Mini-ML including type preservation and
compilation, cut elimination, theory of logic programming,
and Hilbert's deduction theorem.
-- the Twelf home page
WWW: http://www.cs.cmu.edu/~twelf