mattmcd

from subprocess import run
import sympy as sp


def print_to_file(fname, expr):
    # See https://tex.stackexchange.com/questions/34054/tex-to-image-over-command-line/34058#34058
    t_start = r"""\documentclass[border=2pt]{standalone}
\usepackage{amsmath}
\usepackage{varwidth}
\begin{document}

mattmcd

grammar CFunction;


function : retType name args ;

args :	 '(' arg (',' arg)* ')' ;

arg 	
  : 	'double' name 	# SCALAR_ARG
	|	'double' '*' name # ARRAY_ARG

mattmcd

grammar Expr;

// Need to call recursive rule expr from non-recursive rule
r     : expr+ ;

// ANTLR4 : Left recursion!
// Operator precedence matches order of definition
expr  : '-' expr                // Unary minus
      | expr ('*' | '/' ) expr
      | expr ('+' | '-' ) expr

mattmcd

// define a grammar called Hello
grammar Hello;
r   : 'hello' ID;
ID  : [a-z]+ ;
WS  : [ \t\r\n]+ -> skip ;