From 42894f6c8b957541ac0b1830139312047cd8fdc6 Mon Sep 17 00:00:00 2001
From: Komari Spaghetti
Date: Mon, 2 Nov 2020 18:04:30 +0000
Subject: Report error context in Diagnostic (#26)

---
 example/simple.zig | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'example/simple.zig')

diff --git a/example/simple.zig b/example/simple.zig
index adea9f9..f7b5953 100644
--- a/example/simple.zig
+++ b/example/simple.zig
@@ -15,7 +15,16 @@ pub fn main() !void {
         },
     };
 
-    var args = try clap.parse(clap.Help, &params, std.heap.page_allocator);
+    // Initalize our diagnostics, which can be used for reporting useful errors.
+    // This is optional. You can also just pass `null` to `parser.next` if you
+    // don't care about the extra information `Diagnostics` provides.
+    var diag: clap.Diagnostic = undefined;
+
+    var args = clap.parse(clap.Help, &params, std.heap.page_allocator, &diag) catch |err| {
+        // Report useful error and exit
+        diag.report(std.io.getStdErr().outStream(), err) catch {};
+        return err;
+    };
     defer args.deinit();
 
     if (args.flag("--help"))
-- 
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