From 68830a1676f68e6c4052d25a1e206b15533ebec9 Mon Sep 17 00:00:00 2001
From: Deukhoofd <Deukhoofd@gmail.com>
Date: Wed, 21 Nov 2018 17:25:12 +0100
Subject: [PATCH] Don't bind/evaluate variable value if the name is just an
 underscore

---
 Upsilon/Binder/Binder.cs       | 2 ++
 Upsilon/Evaluator/Evaluator.cs | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/Upsilon/Binder/Binder.cs b/Upsilon/Binder/Binder.cs
index 0c527c1..dc408c5 100644
--- a/Upsilon/Binder/Binder.cs
+++ b/Upsilon/Binder/Binder.cs
@@ -224,6 +224,8 @@ namespace Upsilon.Binder
 
         private VariableSymbol TryBindVariable(string name, bool isLocal, BoundExpression assignment)
         {
+            if (name == "_")
+                return null;
             if (!Scope.TryGetVariable(name, !isLocal, out var variable))
             {
                 if (assignment.Type == Type.Table)
diff --git a/Upsilon/Evaluator/Evaluator.cs b/Upsilon/Evaluator/Evaluator.cs
index c087a50..04c6a17 100644
--- a/Upsilon/Evaluator/Evaluator.cs
+++ b/Upsilon/Evaluator/Evaluator.cs
@@ -290,6 +290,8 @@ namespace Upsilon.Evaluator
                     var variableSymbol = e.Variables[i];
                     if (variableSymbol == null)
                         continue;
+                    if (variableSymbol.Name == "_")
+                        continue;
                     var value = table.Get(_diagnostics, e.Span, new NumberLong(i + 1), Scope);
                     if (variableSymbol.Local)
                         Scope.Set(variableSymbol, value);