diamondman / antlr4_javascript_demo Goto Github PK

Simple example of how to use Antlr4 in Javascript. Also a test to see how long it takes me to be able to make something in Node. Also Also part of a project with Drew Winget to build a demo that animates order of operations of algebra.

Requirements: antlr4-javascript: https://github.com/antlr/antlr4-javascript (Should be in a repo soon) ANTLR>=4.5: http://www.antlr.org/download.html (Select Complete ANTLR 4.5 Java binaries jar) Java Runtime Environment: OS dependent. (Needed just to compile the .g file into javascript)

Build Steps: alias antlr4='java -jar "/path/to/antlr-4.5-complete.jar"' antlr4 Calculator.g

Running: Put antlr4-javascript/src/antlr4 (or a package) in your path (You can specify it bash with NODE_PATH='') node run_calculator.js '-2(3+4)^2' # Simplify an expression with basic PEMDAS order of operations. node run_AST.js '-2(3+4)^2' # Product AST in sample JSON format. Format is not supposed to be final and is more of a demonstration of how a structure could be generated from the parser.

Other Stuff: Uncomment the following line in the run_*.js files for more detailed logging. //listener.loginfo=true;