https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91964
Bug ID: 91964
Summary: Wrong -Wint-in-bool-context warning for enum constant
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: joerg.rich...@pdv-fs.de
Target Milestone: ---
cat > t.cc <<EOF
enum Enum { A, B, C };
bool func()
{
if( (int)C ) return true; // 1
if( (bool)C ) return true; // 2
if( static_cast<int>(C) ) return true; // 3
if( static_cast<bool>(C) ) return true; // 4
if( static_cast<bool>( static_cast<int>(C) ) ) return true; // 5
return false;
}
EOF
gcc -c -o t.cc.o t.cc -Wall
####
Gives: warning: enum constant in boolean context [-Wint-in-bool-context]
GCC 9.2 warns for all cases.
GCC 8.3 warns for case 2 & 4.
I think all warnings are wrong because nowhere is a enum constant in a boolean
context.
Enums 'A' and 'B' dont seem to trigger the warning.
