https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109056
Bug ID: 109056
Summary: cppcheck: no warning for suspicious return type
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For the following C code:
unsigned long f( int n)
{
return n * 1000;
}
where the programmer may have intended using an unsigned long constant
like 1000UL, then static analyser cppcheck can be made to say:
mar7b.cc:4:2: style: int result is returned as long value. If the return value
is long to avoid loss of information, then you have loss of information.
[truncLongCastReturn]
return n * 1000;
gcc says nothing:
$ ~/gcc/results/bin/gcc -c -g -O2 -Wall -Wextra mar7b.cc
$
The example code is derived from 10 examples in the source code of
linux-6.3-rc1, so the problem does really occur in practice.
