AntlrI4DE is an Eclipse plugin for editing Antlr4 grammars. One of the features I used to really like in the original Antlr IDE was the ability to generate railroad diagrams. It turns out that Antlr4IDE has this feature, so I decided to give it a try. My jvmBasic grammar is here, and you can…
Commons Math is an Apache library which includes a variety of mathematical tools, including 1st and 2nd-order ODE solvers. In order to familiarize myself with the ODE solvers, I wrote a simple program to solve an RC charging circuit. The circuit has these parameters: R (ohms), the resistance of the resistor C (farads), the capacitance…
I’ve recently becoming interested in porting legacy PHP sites to JSPs. It seemed to me that one of the hardest parts of this problem was parsing the PHP code. Once a parse tree was created, the next step would be to emit equivalent JSP code. I went looking for an ANTL4 grammar for PHP,…