https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86190
Bug ID: 86190
Summary: -Wsign-conversion ignores explicit conversion in some
cases
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: woodroof at gmail dot com
Target Milestone: ---
Created attachment 44289
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44289&action=edit
Preprocessed source file
Affected versions:
g++ (Ubuntu 8-20180414-1ubuntu2) 8.0.1 20180414 (experimental) [trunk revision
259383]
g++-7 (Ubuntu 7.3.0-16ubuntu3) 7.3.0
Command line:
g++ -Wsign-conversion -c 1.cpp
Output:
1.cpp: In member function ‘bool A::func()’:
1.cpp:10:23: warning: conversion to ‘std::vector<int>::size_type’ {aka ‘long
unsigned int’} from ‘int’ may change the sign of the result [-Wsign-conversion]
return vec.size() < static_cast<size_t>(var);
^~~~~~~~~~~~~~~~~~~~~~~~
