RESOLVE (REusable SOftware Language with VErification) is a programming and specification language designed for verifying correctness of object oriented programs.

The RESOLVE language is designed from the ground up to facilitate mathematical reasoning. As such, the language provides syntactic slots for assertions such as pre-post conditions that are capable of abstractly describing a program's intended behavior. In writing these assertions, users are free to draw from from a variety of pre-existing and user-defined mathematical theories containing fundamental axioms, definitions, and results necessary/useful in establishing program correctness.

All phases of the verification process spanning verification condition (VC) generation to proving are performed in-house, while RESOLVE programs are translated to Java and run on the JVM.

##Authors and major contributors The creation and continual evolution of the RESOLVE language is owed to an ongoing joint effort between Clemson University, The Ohio State University, and countless educators and researchers from a variety of [other] (http://www.cs.clemson.edu/resolve/about.html) institutions.

Developers of this particular test/working-iteration of the RESOLVE compiler include:

• [The Resuable Software Research Group (RSRG)] (http://www.cs.clemson.edu/resolve/) - School of Computing, Clemson University

##First steps with RESOLVE

###Requirements To get started, you really only need to have Java JDK 1.8 installed on either Windows, Mac OSX, or Linux (any distribution should do).

###Installing

1. You can download the latest stable build of the tool from the [releases page] (https://github.com/ClemsonRSRG/resolve-lite/releases). Note that the tool comes packaged in a .zip containing both standard RESOLVE libraries and other core .java classes required by generated code.

2. Unpack the .zip to the directory of your choosing, for example, on OSX: /usr/local/<resolve_root_zip_directory> (that is: /usr/local/resolve/). The rest of these instructions will assume this directory -- so make changes accordingly.

3. To help the compiler find the location of standard RESOLVE libraries, it is necessary to set a RESOLVEROOT environment variable:

4. OSX & Linux: Simply open a new terminal and classification the following: export RESOLVEROOT=/usr/local/resolve which should add the correct environment variable to your .bash_profile

5. Windows: Todo

###Setting classpath

With the above steps complete, we need to make sure that Java will be able to find the RESOLVE tool -- which means we need to set the classpath variable accordingly. So once again, open a terminal and classification the following:

export CLASSPATH=".:$RESOLVEROOT/tool/resolve-<VERSION>-complete.jar:$CLASSPATH"

where <VERSION> corresponds to the three digit semantic version contained within the name of .zip (and in the release notes) for the desired build of the tool. For this tutorial, we assume 0.0.1.

To ensure all is well, restart the terminal and run the following command to launch the tool without arguments:

java -jar /usr/local/resolve/tool/resolve-0.0.1-complete.jar

and you should receive the following help prompt:

RESOLVE Compiler Version 0.0.1
 -longMessages        show exception details on errors
 -o ___               specify an output directory where all output is generated
 -lib ___             specify working directory containing *.resolve source files
 ...

###Optional* (but recommended): creating an alias

Typing the above command to run the tool over an over again would be admittedly painful. So to facilitate easier usage of the compiler from the terminal, we can set an alias as follows:

alias resolve='java -jar $RESOLVEROOT/tool/resolve-0.0.1-complete.jar'

now simply typing resolve gives the same effect as the (long) command given in the previous section.

Now that we have the compiler setup, go ahead create a new file called Hello.resolve and punch in the following bit of RESOLVE:

To run, open the terminal, cd to the directory where you've saved the file and classification:

resolve Hello.resolve -genCode Java -jar

The compiler will do some thinking, and eventually produce Hello.jar, which is run as follows:

$java -jar Hello.jar
>hello world!

##Useful information

• Release notes
• Official site
• [RESOLVE wiki] (https://github.com/Welchd1/resolve-lite/wiki)

##Copyright and license

Copyright (c) Clemson University, 2015. All rights reserved. The use and distribution terms for this software are covered by the BSD 3-clause license which can be found in the file LICENSE.txt at the root of this repository. By using this software in any fashion, you are agreeing to be bound by the terms of this license. You must not remove this notice, or any other, from this software.