https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101054
Bug ID: 101054
Summary: Compiler inconsistently gives error when constexpr
class function is called from lambda
Product: gcc
Version: 9.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: peter.fletcher at bandicootimaging dot com.au
Target Milestone: ---
Created attachment 51004
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51004&action=edit
Source code to generate bug and GCC version info
g++ treats a class with a constexpr cast function inconsistently when passed
and captured by a lambda, with one usage producing the error message "error:
use of ‘this’ in a constant expression". The error occurs in g++ 9.4.0 with
-std=c++14 but not with -std=c++17.
Apparently this problem does not occur with Godbolt, but I cannot test this
myself.
