package alba

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Alba compiler

Install

Dune Dependency

albatross-lang.sourceforge.net Readme Edit opam file Versions (5)

Authors

H

Helmut Brandl <helmut.brandl@gmx.net>

Maintainers

H

Helmut Brandl <helmut.brandl@gmx.net>

Sources

0.4.1.tar.gz

sha256=439b1dce07c86e914d1ebf1712c5581418314b0c8d13594f27a698b1d25fe272

md5=5cf58d4ed4eacbe6f330e9d2378ef5c6

doc/alba.albalib/Albalib/Unifier/module-type-HOLES/index.html

Module type `Unifier.HOLES`Source

include Gamma_algo.GAMMA

type t

val count : t -> int

Number of variables in the context.

val push_local : string -> Term.typ -> t -> t

push_local name typ gamma

Add the local variable with name and typ to the context.

Precondition

name <> ""

val type_of_literal : Term.Value.t -> t -> Term.typ

val type_of_variable : int -> t -> Term.typ

type_of_variable idx gamma

Return the type of the variable idx. idx is the De Bruijn index i.e. and index of 0 points to the last variable and an index of count gamma - 1 points to the first variable.

val definition_term : int -> t -> Term.t option

definition_term idx gamma

If the variable idx has a definition, then return it. Otherwise return None.

val context : t -> Gamma.t

val expand : Term.t -> t -> Term.t

val is_hole : int -> t -> bool

val value : int -> t -> Term.t option

val fill_hole0 : int -> Term.t -> bool -> t -> t