https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91578
Bug ID: 91578
Summary: bool to size_t warning -Wsigned-conversion
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jg at jguk dot org
Target Milestone: ---
PR created after discussion on gcc-help
https://gcc.gnu.org/ml/gcc-help/2019-08/msg00082.html
Could I suggest -Wsigned-conversion should ignore warnings about bool being
added to a bool and then converted to a size_t "signed bool" does not make
sense was one of the comments.
int main()
{
bool a = false;
bool b = true;
//size_t i = a;
size_t i = a + b;
return i;
}
#1 with x86-64 gcc (trunk)
<source>: In function 'int main()':
<source>:9:18: error: conversion to 'size_t' {aka 'long unsigned int'}
from 'int' may change the sign of the result [-Werror=sign-conversion]
9 | size_t i = a + b;
| ^
cc1plus: some warnings being treated as errors
Compiler returned: 1
