From 5ade46246e89e7c4bc574d971e9b0a525f16d943 Mon Sep 17 00:00:00 2001
From: Jonathan Brouwer <jonathantbrouwer@gmail.com>
Date: Sat, 28 Feb 2026 19:30:55 +0100
Subject: [PATCH] Move `DiagArgMap` to `rustc_error_messages`

---
 compiler/rustc_error_messages/src/lib.rs | 3 +++
 compiler/rustc_errors/src/diagnostic.rs  | 5 +----
 compiler/rustc_errors/src/lib.rs         | 6 +++---
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/compiler/rustc_error_messages/src/lib.rs b/compiler/rustc_error_messages/src/lib.rs
index a2807c852632..cf194ea6bbc4 100644
--- a/compiler/rustc_error_messages/src/lib.rs
+++ b/compiler/rustc_error_messages/src/lib.rs
@@ -13,6 +13,7 @@
 
 mod diagnostic_impls;
 pub use diagnostic_impls::DiagArgFromDisplay;
+use rustc_data_structures::fx::FxIndexMap;
 
 pub fn register_functions<R, M>(bundle: &mut fluent_bundle::bundle::FluentBundle<R, M>) {
     bundle
@@ -310,6 +311,8 @@ pub enum DiagArgValue {
     StrListSepByAnd(Vec<Cow<'static, str>>),
 }
 
+pub type DiagArgMap = FxIndexMap<DiagArgName, DiagArgValue>;
+
 /// Converts a value of a type into a `DiagArg` (typically a field of an `Diag` struct).
 /// Implemented as a custom trait rather than `From` so that it is implemented on the type being
 /// converted rather than on `DiagArgValue`, which enables types from other `rustc_*` crates to
diff --git a/compiler/rustc_errors/src/diagnostic.rs b/compiler/rustc_errors/src/diagnostic.rs
index 41005d12a191..27a70534c5bc 100644
--- a/compiler/rustc_errors/src/diagnostic.rs
+++ b/compiler/rustc_errors/src/diagnostic.rs
@@ -7,8 +7,7 @@
 use std::path::PathBuf;
 use std::thread::panicking;
 
-use rustc_data_structures::fx::FxIndexMap;
-use rustc_error_messages::{DiagArgName, DiagArgValue, IntoDiagArg};
+use rustc_error_messages::{DiagArgMap, DiagArgName, DiagArgValue, IntoDiagArg};
 use rustc_lint_defs::{Applicability, LintExpectationId};
 use rustc_macros::{Decodable, Encodable};
 use rustc_span::source_map::Spanned;
@@ -20,8 +19,6 @@
     MultiSpan, StashKey, Style, Substitution, SubstitutionPart, SuggestionStyle, Suggestions,
 };
 
-pub type DiagArgMap = FxIndexMap<DiagArgName, DiagArgValue>;
-
 /// Trait for types that `Diag::emit` can return as a "guarantee" (or "proof")
 /// token that the emission happened.
 pub trait EmissionGuarantee: Sized {
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index 0386ce9eed95..bc8e7af7fd5a 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -39,8 +39,8 @@
 pub use codes::*;
 pub use decorate_diag::{BufferedEarlyLint, DecorateDiagCompat, LintBuffer};
 pub use diagnostic::{
-    BugAbort, Diag, DiagArgMap, DiagInner, DiagStyledString, Diagnostic, EmissionGuarantee,
-    FatalAbort, LintDiagnostic, LintDiagnosticBox, StringPart, Subdiag, Subdiagnostic,
+    BugAbort, Diag, DiagInner, DiagStyledString, Diagnostic, EmissionGuarantee, FatalAbort,
+    LintDiagnostic, LintDiagnosticBox, StringPart, Subdiag, Subdiagnostic,
 };
 pub use diagnostic_impls::{
     DiagSymbolList, ElidedLifetimeInPathSubdiag, ExpectedLifetimeParameter,
@@ -53,7 +53,7 @@
 use rustc_data_structures::sync::{DynSend, Lock};
 use rustc_data_structures::{AtomicRef, assert_matches};
 pub use rustc_error_messages::{
-    DiagArg, DiagArgFromDisplay, DiagArgName, DiagArgValue, DiagMessage, IntoDiagArg,
+    DiagArg, DiagArgFromDisplay, DiagArgMap, DiagArgName, DiagArgValue, DiagMessage, IntoDiagArg,
     LanguageIdentifier, MultiSpan, SpanLabel, fluent_bundle, into_diag_arg_using_display,
 };
 use rustc_hashes::Hash128;