way better lex function

var_table.go

@@ -0,0 +1,22 @@
+package shsh
+
+type VarTable map[string]*Token
+
+var (
+    GlobalVarTable *VarTable
+)
+
+// Library represents variables defined in inner scope
+// It is assumed library is ordered from innermost scope to outermost scope
+func GetVar(arg string, library []VarTable) *Token {
+    for scope, dict := range library {
+        val, ok := dict[arg]
+        if ok {
+            scope = scope // TEMP LINE
+            // TODO: maybe log which scope it was found in?
+            return val
+        }
+    }
+
+    return nil
+}