From a665872e881920e8020a513340d2427b88a55bd6 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Fri, 24 Feb 2017 15:00:47 -0500
Subject: add compile error for ignoring return value

also introduce the _ identifier which you can assign to
to discard a return value

closes #219
---
 src/codegen.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/codegen.cpp')

diff --git a/src/codegen.cpp b/src/codegen.cpp
index 8fec6a4c51..99e095ffbc 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -2928,6 +2928,7 @@ static LLVMValueRef gen_const_val(CodeGen *g, ConstExprValue *const_val) {
                 render_const_val_global(g, const_val, "");
                 switch (const_val->data.x_ptr.special) {
                     case ConstPtrSpecialInvalid:
+                    case ConstPtrSpecialDiscard:
                         zig_unreachable();
                     case ConstPtrSpecialRef:
                         {
-- 
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