public static IEnumerable <Expression> GetExpression(string input)
{
var node = new ExpParser(new StringReader(input.TrailingNewline())).Parse();
var extractor = new ExprExtractor();
extractor.Analyze(node);
// ExitFacts called backwards to line order because of recursive definition
extractor.expressions.Reverse();
return(extractor.expressions);
}
static void Main(string[] args)
{
var input = @"1
1+2
1 + 2 = 3
1+2=3
|123=a";
if (args.Length == 1)
{
input = File.ReadAllText(args[0]);
}
var expressions = ExprExtractor.GetExpression(input);
Console.WriteLine(string.Join(Environment.NewLine + Environment.NewLine, expressions));
}
