SemGuS Java Consumer

This library provides a means of marshalling the SemGuS parser's JSON output into a usable data structure for JVM-based languages.

Requirements

The recommended way to use SemGuS-Java is to install it from Maven via JitPack, which is accomplished in Gradle as follows:

repositories {
    maven("https://jitpack.io") { name = "Jitpack" }
}

dependencies {
    implementation("com.github.SemGuS-git:Semgus-Java:1.1.0")
}

SemGuS-Java depends at runtime on JSON-Simple and at compile-time on JSR-305, which is available as part of Google FindBugs. These dependencies are available at the following Maven coordinates, if you wish to install them manually:

repositories {
    mavenCentral()
    maven("https://jitpack.io") { name = "Jitpack" }
}

dependencies {
    implementation("com.github.phantamanta44:jsr305:1.0.1")
    implementation("com.googlecode.json-simple:json-simple:1.1.1")
}

SemGuS-Java targets Java 17 and makes extensive use of sealed types and records to represent SemGuS objects.

Usage

SemGuS-Java provides two different representations for SemGuS problems: a stream of specification events and a SemgusProblem data structure. These are comparable to SAX-style and DOM-style XML parsing, respectively.

To produce a stream of events, you can use the functions defined in EventParser, which parse JSON objects into event objects. For example:

List<SpecEvent> events;
try (Reader reader = new FileReader(new File("max2-exp.sem.json"))) { // open a reader for the JSON file
    events = EventParser.parse(reader); // parse the spec file into a series of events
}
for (SpecEvent event : events) { // dump all the events to console
    System.out.println(event);
}

To produce a SemgusProblem, you can use the functions defined in ProblemGenerator, which consumes a sequence of events, assembling the synthesis problem data into a SemgusProblem data structure. For example:

SemgusProblem problem;
try (Reader reader = new FileReader(new File("max2-exp.sem.json"))) { // open a reader for the JSON file
    problem = ProblemGenerator.parse(reader); // parse the spec file into a SemGuS problem object
}
System.out.println(problem.dump()); // print a human-readable representation of the SemGuS problem

Additionally, an entry point is available in Main, which simply takes a SemGuS JSON document, parses it into a SemGuS problem, then dumps it to standard output:

$ java -jar semgus-java.jar max2-exp.sem.json

The current JSON format is in line with the 2-23-24 edition of Semgus-Parser which introduced support for parametric sorts.

For more information, check out all the declarations and accompanying JavaDocs in the source code.