From c2db91336ab0b59e7ee0b0eb308105ec4dc86075 Mon Sep 17 00:00:00 2001 From: Aaron Ballman Date: Wed, 28 Nov 2018 11:57:13 +0000 Subject: Fix a false-positive with cert-err58-cpp. If a variable is declared constexpr then its initializer needs to be a constant expression, and thus, cannot throw. This check is about not throwing exceptions before main() runs, and so it doesn't apply if the initializer cannot throw. This silences the diagnostic when initializing a constexpr variable and fixes PR35457. --- .../test/clang-tidy/cert-static-object-exception.cpp | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'clang-tools-extra/test') diff --git a/clang-tools-extra/test/clang-tidy/cert-static-object-exception.cpp b/clang-tools-extra/test/clang-tidy/cert-static-object-exception.cpp index aa34bbd0f53..9181dc7ebaa 100644 --- a/clang-tools-extra/test/clang-tidy/cert-static-object-exception.cpp +++ b/clang-tools-extra/test/clang-tidy/cert-static-object-exception.cpp @@ -1,7 +1,7 @@ // RUN: clang-tidy %s -checks="-*,cert-err58-cpp" -- -std=c++11 -target x86_64-pc-linux-gnu \ // RUN: | FileCheck %s -check-prefix=CHECK-EXCEPTIONS \ // RUN: -implicit-check-not="{{warning|error}}:" -// RUN: clang-tidy %s -checks="-*,cert-err58-cpp" -- -fno-exceptions -std=c++11 -target x86_64-pc-linux-gnu \ +// RUN: clang-tidy %s -checks="-*,cert-err58-cpp" -- -DNONEXCEPTIONS -fno-exceptions -std=c++11 -target x86_64-pc-linux-gnu \ // RUN: | FileCheck %s -allow-empty -check-prefix=CHECK-NONEXCEPTIONS \ // RUN: -implicit-check-not="{{warning|error}}:" @@ -223,3 +223,16 @@ W Statics::w; // CHECK-EXCEPTIONS: :[[@LINE-1]]:12: warning: initialization of 'w' with static storage duration may throw an exception that cannot be caught // CHECK-EXCEPTIONS: 29:3: note: possibly throwing constructor declared here // CHECK-NONEXCEPTIONS-NOT: warning: + +#ifndef NONEXCEPTIONS +namespace pr35457 { +constexpr int foo(int x) { if (x <= 0) throw 12; return x; } + +constexpr int bar = foo(1); // OK +// CHECK-EXCEPTIONS-NOT: warning: initialization of 'bar' with static storage +int baz = foo(0); // Not OK; throws at runtime when exceptions are enabled. +// CHECK-EXCEPTIONS: :[[@LINE-1]]:5: warning: initialization of 'baz' with static storage duration may throw an exception that cannot be caught [cert-err58-cpp] +// CHECK-EXCEPTIONS: :[[@LINE-6]]:15: note: possibly throwing function declared here +} // namespace pr35457 +#endif // NONEXCEPTIONS + -- cgit v1.2.3