From b65cca37ceb2b4181a4e713c270c546682acea23 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Tue, 28 Aug 2018 15:48:39 -0400
Subject: [PATCH] add test coverage for invalid switch expression parameter

closes #604
---
 test/compile_errors.zig | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index 5405b7b8a8..9979ed666c 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -1,6 +1,22 @@
 const tests = @import("tests.zig");
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
+    cases.add(
+        "switch with invalid expression parameter",
+        \\export fn entry() void {
+        \\    Test(i32);
+        \\}
+        \\fn Test(comptime T: type) void {
+        \\    const x = switch (T) {
+        \\        []u8 => |x| 123,
+        \\        i32 => |x| 456,
+        \\        else => unreachable,
+        \\    };
+        \\}
+    ,
+        ".tmp_source.zig:7:17: error: switch on type 'type' provides no expression parameter",
+    );
+
     cases.add(
         "function protoype with no body",
         \\fn foo() void;