From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../rustc_error_codes/src/error_codes/E0436.md     | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 compiler/rustc_error_codes/src/error_codes/E0436.md

(limited to 'compiler/rustc_error_codes/src/error_codes/E0436.md')

diff --git a/compiler/rustc_error_codes/src/error_codes/E0436.md b/compiler/rustc_error_codes/src/error_codes/E0436.md
new file mode 100644
index 000000000..48ecc49e9
--- /dev/null
+++ b/compiler/rustc_error_codes/src/error_codes/E0436.md
@@ -0,0 +1,48 @@
+The functional record update syntax was used on something other than a struct.
+
+Erroneous code example:
+
+```compile_fail,E0436
+enum PublicationFrequency {
+    Weekly,
+    SemiMonthly { days: (u8, u8), annual_special: bool },
+}
+
+fn one_up_competitor(competitor_frequency: PublicationFrequency)
+                     -> PublicationFrequency {
+    match competitor_frequency {
+        PublicationFrequency::Weekly => PublicationFrequency::SemiMonthly {
+            days: (1, 15), annual_special: false
+        },
+        c @ PublicationFrequency::SemiMonthly{ .. } =>
+            PublicationFrequency::SemiMonthly {
+                annual_special: true, ..c // error: functional record update
+                                          //        syntax requires a struct
+        }
+    }
+}
+```
+
+The functional record update syntax is only allowed for structs (struct-like
+enum variants don't qualify, for example). To fix the previous code, rewrite the
+expression without functional record update syntax:
+
+```
+enum PublicationFrequency {
+    Weekly,
+    SemiMonthly { days: (u8, u8), annual_special: bool },
+}
+
+fn one_up_competitor(competitor_frequency: PublicationFrequency)
+                     -> PublicationFrequency {
+    match competitor_frequency {
+        PublicationFrequency::Weekly => PublicationFrequency::SemiMonthly {
+            days: (1, 15), annual_special: false
+        },
+        PublicationFrequency::SemiMonthly{ days, .. } =>
+            PublicationFrequency::SemiMonthly {
+                days, annual_special: true // ok!
+        }
+    }
+}
+```
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