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Merge branch 'master' of https://github.com/mthom/rusty-wam

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Mark Thom
2019-03-06 21:53:17 -07:00
parent b69bf71ff4 460a4edadc
commit 2467df232d
2 changed files with 52 additions and 49 deletions
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73
Cargo.lock generated
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@@ -1,11 +1,11 @@
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28
README.md
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@@ -1,6 +1,6 @@
# rusty-wam
# Scryer Prolog
rusty-wam aims to become to ISO Prolog what GHC is to Haskell: an open
Scryer Prolog aims to become to ISO Prolog what GHC is to Haskell: an open
source industrial strength production environment that is also a
testbed for bleeding edge research in logic and constraint
programming, which is itself written in a high-level language.
@@ -12,13 +12,13 @@ according to the progression of languages in [Warren's Abstract
Machine: A Tutorial
Reconstruction](http://wambook.sourceforge.net/wambook.pdf).
Phase 1 has been completed in that rusty-wam implements in some form
Phase 1 has been completed in that Scryer Prolog implements in some form
all of the WAM book, including lists, cuts, Debray allocation, first
argument indexing, last call optimization and conjunctive queries.
## Phase 2
Extend rusty-wam to include the following, among other features:
Extend Scryer Prolog to include the following, among other features:
* call/N as a built-in meta-predicate (_done_).
* ISO Prolog compliant throw/catch (_done_).
@@ -59,14 +59,14 @@ Use the WAM code produced by the completed code generator to get
JIT-compiled and -executed Prolog programs. The question of how to get
assembly from WAM code is something I'm still considering.
It's my hope to use rusty-wam as the logic engine of a low level (and
It's my hope to use Scryer Prolog as the logic engine of a low level (and
ideally, very fast) [Shen](http://shenlanguage.org) implementation.
## Nice to have features
There are no current plans to implement any of these, but they might be
nice to have in the future. They'd make a good project for anyone wanting
to contribute code to rusty-wam.
to contribute code to Scryer Prolog.
1. Implement the global analysis techniques described in Peter van
Roy's thesis, "Can Logic Programming Execute as Fast as Imperative
@@ -86,22 +86,22 @@ strings.
6. Add some form of JIT predicate indexing.
## Installing rusty-wam
## Installing Scryer Prolog
First, install the latest stable version of
[Rust](https://www.rust-lang.org/en-US/install.html) using your
preferred method. Then install the latest rusty-wam with cargo,
preferred method. Then install the latest Scryer Prolog with cargo,
like so:
```
$> cargo install rusty-wam
```
cargo will download and install the libraries rusty-wam uses
cargo will download and install the libraries Scryer Prolog uses
automatically. You can find the `rusty-wam` executable in
`~/.cargo/bin`.
Note on compatibility: rusty-wam should work on Linux, Mac OS X, and
Note on compatibility: Scryer Prolog should work on Linux, Mac OS X, and
FreeBSD. Windows support hinges on the Termion library working in
Windows terminals, which isn't yet the case, although work is
underway. See the relevant Termion
@@ -110,7 +110,7 @@ information.
## Built-in predicates
The following predicates are built-in to rusty-wam.
The following predicates are built-in to Scryer.
* Arithmetic support:
* `is/2` works for `(+)/2`, `(-)/{1,2}`, `(*)/2`, `(//)/2`, `(**)/2`, `(div)/2`, `(/)/2`, `(rdiv)/2`,
@@ -262,7 +262,7 @@ a number preceded by an underscore (`X = _0` in an example above).
### Dynamic operators
rusty-wam supports dynamic operators. Using the built-in
Scryper supports dynamic operators. Using the built-in
arithmetic operators with the usual precedences,
```
@@ -275,7 +275,7 @@ New operators can be defined using the `op` declaration.
### Partial strings
rusty-wam has two specialized, non-ISO builtin predicates for handling
Scryer has two specialized, non-ISO builtin predicates for handling
so-called "partial strings". Partial strings imitate difference lists
of characters, but are much more space efficient. This efficiency
comes at the cost of full generality -- you cannot unify the tail
@@ -294,7 +294,7 @@ another string, "def" in this case, produces the equations
### Modules
rusty-wam has a simple predicate-based module system. It provides a
Scryer has a simple predicate-based module system. It provides a
way to separate units of code into distinct namespaces, for both
predicates and operators. See the files `src/prolog/lib/*.pl` for
examples.