https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70881
Bug ID: 70881
Summary: -Wunused-parameter incorrect for macro case
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ian at geometrian dot com
Target Milestone: ---
Created attachment 38380
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38380&action=edit
Simple example.
In the attached example, adapted from real-world image-processing code, a macro
is used to paste a case statement that contains a parameter. However,
-Wunused-parameter reports that it is not used, erroneously.
Produces:
macro-example.cpp: In function 'ImageBase* get_new_diffabs(const ImageBase*,
const ImageBase*)':
35 : warning: unused parameter 'img1' [-Wunused-parameter]
