https://github.com/zyn0217 created https://github.com/llvm/llvm-project/pull/139374
For a member function call like 'foo.bar<int>()', there are two typo-correction points after parsing the dot. The first occurs in ParseOptionalCXXScopeSpecifier, which tries to annotate the template name following any scope specifiers. If the template name bar is not found within 'foo', the parser was previously instructed to drop any function templates found outside of the scope. This was intended to prevent ambiguity in expressions like 'foo->bar < 7', as explained in commit 50a3cddd. However, it's unnecessary to discard typo-corrected results that were strictly resolved within the scope 'foo'. We won't perform a second typo-correction in ParseUnqualifiedId after the name being annotated. Fixes https://github.com/llvm/llvm-project/issues/139226 >From 1e359714374418bf51e93d54169557c29bddf7c6 Mon Sep 17 00:00:00 2001 From: Younan Zhang <zyn7...@gmail.com> Date: Sat, 10 May 2025 18:59:03 +0800 Subject: [PATCH] [Clang] Don't ditch typo-corrected lookup result For a member function call like 'foo.bar<int>()', there are two typo-correction points after parsing the dot. The first occurs in ParseOptionalCXXScopeSpecifier, which tries to annotate the template name following any scope specifiers. If the template name bar is not found within 'foo', the parser was previously instructed to drop any function templates found outside of the scope. This was intended to prevent ambiguity in expressions like 'foo->bar < 7', as explained in commit 50a3cddd. However, it's unnecessary to discard typo-corrected results that were strictly resolved within the scope 'foo'. We won't perform a second typo-correction in ParseUnqualifiedId after the name being annotated. --- clang/docs/ReleaseNotes.rst | 5 ++++- clang/lib/Sema/SemaTemplate.cpp | 3 +++ .../basic/basic.lookup/basic.lookup.classref/p1.cpp | 13 +++++++++++++ 3 files changed, 20 insertions(+), 1 deletion(-) diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst index 1d0896f585fb4..234c28a143cf1 100644 --- a/clang/docs/ReleaseNotes.rst +++ b/clang/docs/ReleaseNotes.rst @@ -517,7 +517,10 @@ Improvements to Clang's diagnostics - Improved the ``-Wtautological-overlap-compare`` diagnostics to warn about overlapping and non-overlapping ranges involving character literals and floating-point literals. The warning message for non-overlapping cases has also been improved (#GH13473). - + +- Fixed a duplicate diagnostic when performing typo correction on function template + calls with explicit template arguments. Fixes #GH139226. + Improvements to Clang's time-trace ---------------------------------- diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp index 2ba69c87d95e3..a18b545a5feea 100644 --- a/clang/lib/Sema/SemaTemplate.cpp +++ b/clang/lib/Sema/SemaTemplate.cpp @@ -523,6 +523,9 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS, if (Found.isAmbiguous()) { Found.clear(); } else if (!Found.empty()) { + // Do not erase the typo-corrected result to avoid duplicating the typo + // correction in future. + AllowFunctionTemplatesInLookup = true; Found.setLookupName(Corrected.getCorrection()); if (LookupCtx) { std::string CorrectedStr(Corrected.getAsString(getLangOpts())); diff --git a/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp b/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp index e3599db18350b..3633ef1c293e2 100644 --- a/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp +++ b/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp @@ -98,3 +98,16 @@ namespace PR11856 { } } } + +namespace GH139226 { + +struct Foo { + template <class T> void LookupWithID(); // expected-note {{declared here}} +}; + +void test(Foo &f) { + f.LookupWithId<int>(); + // expected-error@-1 {{did you mean 'LookupWithID'}} +} + +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
