https://github.com/AmrDeveloper updated
https://github.com/llvm/llvm-project/pull/129116
>From ed0cf3f026e439288f8334f27555ad26825fd56a Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Thu, 27 Feb 2025 21:49:32 +0100
Subject: [PATCH 1/3] [Clang][diagnostics] Fix structured binding shadows
template parameter location
---
clang/lib/Sema/SemaDeclCXX.cpp | 3 +--
clang/test/CXX/temp/temp.res/temp.local/p6.cpp | 5 +++++
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 664d48ccbc382..a3a028b9485d6 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -883,8 +883,7 @@ Sema::ActOnDecompositionDeclarator(Scope *S, Declarator &D,
// It's not permitted to shadow a template parameter name.
if (Previous.isSingleResult() &&
Previous.getFoundDecl()->isTemplateParameter()) {
- DiagnoseTemplateParameterShadow(D.getIdentifierLoc(),
- Previous.getFoundDecl());
+ DiagnoseTemplateParameterShadow(B.NameLoc, Previous.getFoundDecl());
Previous.clear();
}
diff --git a/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
b/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
index 00bb35813c39a..e464bb5e7eaef 100644
--- a/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
+++ b/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
@@ -162,3 +162,8 @@ struct A {
};
A<0>::B a;
}
+
+template <typename T> void shadow9() { // expected-note{{template parameter
is declared here}}
+ using arr = int[1]; // expected-warning@+1 {{decomposition declarations are
a C++17 extension}}
+ auto [T] = arr{}; // expected-error {{declaration of 'T' shadows template
parameter}}
+}
>From 7712fc1c2406974d64e6fa8c162d12b6090903f2 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Fri, 28 Feb 2025 18:43:54 +0100
Subject: [PATCH 2/3] Add release note and improve testing
---
clang/docs/ReleaseNotes.rst | 2 ++
clang/test/CXX/temp/temp.res/temp.local/p6.cpp | 6 ++++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 2b72143482943..b1ea63a01b914 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -214,6 +214,8 @@ Improvements to Clang's diagnostics
:doc:`ThreadSafetyAnalysis` still does not perform alias analysis. The
feature will be default-enabled with ``-Wthread-safety`` in a future release.
+- Improve the diagnostics for shadows template parameter.
+
Improvements to Clang's time-trace
----------------------------------
diff --git a/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
b/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
index e464bb5e7eaef..aa00e1b8811ec 100644
--- a/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
+++ b/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
@@ -163,7 +163,9 @@ struct A {
A<0>::B a;
}
-template <typename T> void shadow9() { // expected-note{{template parameter
is declared here}}
+template <typename T> void shadow() { // expected-note{{template parameter is
declared here}}
using arr = int[1]; // expected-warning@+1 {{decomposition declarations are
a C++17 extension}}
- auto [T] = arr{}; // expected-error {{declaration of 'T' shadows template
parameter}}
+ auto [
+ T // expected-error {{declaration of 'T' shadows template parameter}}
+ ] = arr{};
}
>From 780a3b259283834e72dccd1ac34cbeafb0a301d9 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Fri, 28 Feb 2025 19:38:21 +0100
Subject: [PATCH 3/3] Address code review comments
---
clang/docs/ReleaseNotes.rst | 2 +-
clang/test/CXX/temp/temp.res/temp.local/p6.cpp | 3 ++-
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index b1ea63a01b914..6c9eacbb0751d 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -214,7 +214,7 @@ Improvements to Clang's diagnostics
:doc:`ThreadSafetyAnalysis` still does not perform alias analysis. The
feature will be default-enabled with ``-Wthread-safety`` in a future release.
-- Improve the diagnostics for shadows template parameter.
+- Improve the diagnostics for shadows template parameter to report correct
location (#GH129060).
Improvements to Clang's time-trace
----------------------------------
diff --git a/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
b/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
index aa00e1b8811ec..ee23bf103d450 100644
--- a/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
+++ b/clang/test/CXX/temp/temp.res/temp.local/p6.cpp
@@ -164,7 +164,8 @@ A<0>::B a;
}
template <typename T> void shadow() { // expected-note{{template parameter is
declared here}}
- using arr = int[1]; // expected-warning@+1 {{decomposition declarations are
a C++17 extension}}
+ using arr = int[1];
+ // expected-warning@+1 {{decomposition declarations are a C++17 extension}}
auto [
T // expected-error {{declaration of 'T' shadows template parameter}}
] = arr{};
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