https://github.com/chaitanyav updated
https://github.com/llvm/llvm-project/pull/159277
>From bee11d34f36de3f2a9071bbb413b6fbbbec5ae52 Mon Sep 17 00:00:00 2001
From: NagaChaitanya Vellanki <pnag...@protonmail.com>
Date: Wed, 17 Sep 2025 00:04:24 -0700
Subject: [PATCH] [clang-format] Fix for BreakTemplateDeclarations and
RequiresClausePosition
when BreakTemplateDeclarations is set to yes and
RequiresClausePosition is SingleLine or WithPreceding
requires clause should be on the same line
Fixes #150845
---
clang/lib/Format/TokenAnnotator.cpp | 6 ++++++
clang/unittests/Format/FormatTest.cpp | 8 ++++++++
2 files changed, 14 insertions(+)
diff --git a/clang/lib/Format/TokenAnnotator.cpp
b/clang/lib/Format/TokenAnnotator.cpp
index d97f56751ea69..d89d1cdd12c29 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -5854,6 +5854,12 @@ bool TokenAnnotator::mustBreakBefore(const AnnotatedLine
&Line,
// concept ...
if (Right.is(tok::kw_concept))
return Style.BreakBeforeConceptDeclarations == FormatStyle::BBCDS_Always;
+ if (Style.BreakTemplateDeclarations == FormatStyle::BTDS_Yes &&
+ Right.is(TT_RequiresClause) &&
+ (Style.RequiresClausePosition == FormatStyle::RCPS_WithPreceding ||
+ Style.RequiresClausePosition == FormatStyle::RCPS_SingleLine)) {
+ return false;
+ }
return Style.BreakTemplateDeclarations == FormatStyle::BTDS_Yes ||
(Style.BreakTemplateDeclarations == FormatStyle::BTDS_Leave &&
Right.NewlinesBefore > 0);
diff --git a/clang/unittests/Format/FormatTest.cpp
b/clang/unittests/Format/FormatTest.cpp
index d9db06667d802..53b591bf504af 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -10848,6 +10848,14 @@ TEST_F(FormatTest, WrapsTemplateDeclarations) {
"public:\n"
" E *f();\n"
"};");
+ AlwaysBreak.RequiresClausePosition = FormatStyle::RCPS_SingleLine;
+ verifyFormat("template <typename T> requires std::floating_point<T>\n"
+ "using LerpValue = ClampedValue<T, T{0}, T{1}>;",
+ AlwaysBreak);
+ AlwaysBreak.RequiresClausePosition = FormatStyle::RCPS_WithPreceding;
+ verifyFormat("template <typename T> requires std::floating_point<T>\n"
+ "using LerpValue = ClampedValue<T, T{0}, T{1}>;",
+ AlwaysBreak);
FormatStyle NeverBreak = getLLVMStyle();
NeverBreak.BreakTemplateDeclarations = FormatStyle::BTDS_No;
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