https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92675
Bug ID: 92675
Summary: sign-conversion C++ unsigned int j = -1;
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jg at jguk dot org
Target Milestone: ---
Could G++ also give a nice error for -Wsign-conversion ?
unsigned int j = -1;
GCC does already for C code, as does Clang C++
#1 with x86-64 gcc (trunk)
<source>:1:18: warning: unsigned conversion from 'int' to 'unsigned int'
changes value from '-1' to '4294967295' [-Wsign-conversion]
1 | unsigned int j = -1;
| ^~
Clang gives a nice error with C++:
#1 with x86-64 clang (trunk)
<source>:1:18: warning: implicit conversion changes signedness: 'int' to
'unsigned int' [-Wsign-conversion]
unsigned int j = -1;
~ ^~
1 warning generated.
Compiler returned: 0
Compiler returned: 1
