githubjakob / antlrastgenerator

Antlr Java Ast Generator

https://github.com/githubjakob/AntlrAstGenerator

This projects generates an Abstract Syntax Tree (AST) from Java sourcecode, and produces a list of the names (types) of all the by performing a depth-first search.

Goal

Generate an AST from Sourcecode for various input languages using Antlr4.

Input languages (Grammars)

• Java
• JavaScript
• C++
• C
• C#
• Python

Dependencies

• Antrl 4.7 from Maven org.antlr:antlr4:4.7 https://github.com/antlr/antlr4
• Java8 Grammar https://github.com/antlr/grammars-v4/tree/master/java8

Generate AST using Antrl TestRig and Gui

java -jar antlr.jar Java8.g4 

javac -cp ./antlr.jar *.java

java -cp .:antlr.jar org.antlr.v4.gui.TestRig Java8 compilationUnit -gui Test.java

Status other languages

Other languages currently work with Antlr in the command line:

###Java8

java -jar antlr.jar Java8.g4

javac -cp ./antlr.jar *.java

StartRuleName: compilationUnit

https://github.com/antlr/grammars-v4/tree/master/java8

Generate the Lexer and Parser with

antlr4 -no-visitor -no-listener -package com.sense.antlrastgenerator.grammar.java8 Java8.g4

Python3

java -jar antlr.jar Python3.g4

javac -cp ./antlr.jar *.java

https://github.com/antlr/grammars-v4/blob/master/python3/Python3.g4

startRuleName: single_input

java -cp .:../antlr/antlr.jar org.antlr.v4.gui.TestRig Python3 single_input -gui Test.py

JavaScript

https://github.com/antlr/grammars-v4/tree/master/javascript

Download both Lexer and Parser g4

antlr4 JavaScriptParser.g4 antlr4 JavaScriptLexer.g4

download also the /java/JavaScriptBaseLexer.java and JavaScriptBaseParser.java

compile everything javac *.java

java -cp .:../../antlr/antlr.jar org.antlr.v4.gui.TestRig JavaScript program -gui Test.js

CPP

java -cp .:../../antlr/antlr.jar org.antlr.v4.gui.TestRig CPP14 translationunit -gui Test.cc

C

java -cp .:../../antlr/antlr.jar org.antlr.v4.gui.TestRig C compilationUnit -gui Test.c

CSharp

java -cp .:../../antlr/antlr.jar org.antlr.v4.gui.TestRig CSharp compilation_unit -gui Test.cs