From bb80f93c4753ca80eb75bf83bb5f55b1ec885477 Mon Sep 17 00:00:00 2001
From: Chris Lattner
Note that instead of adding virtual methods to the ExprAST class hierarchy, it could also make sense to use a visitor pattern or some other way to model this. Again, this tutorial won't dwell on good software engineering practices: -for our purposes, adding virtual methods is simplest.
+for our purposes, adding a virtual method is simplest.The second thing we want is an "Error" method like we used for parser, which will -- 2.34.1