https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88075
--- Comment #6 from Hannes Hauswedell <h2+bugs at fsfe dot org> --- (In reply to Jason Merrill from comment #5) > Author: jason > Date: Tue Nov 5 11:46:54 2019 > New Revision: 277825 > > URL: https://gcc.gnu.org/viewcvs?rev=277825&root=gcc&view=rev > Log: > PR c++/88075 - Don't require 'bool' in a concept definition. > > * parser.c (cp_parser_decl_specifier_seq): Support C++20 > concept-definition syntax without 'bool'. > > Added: > branches/gcc-8-branch/gcc/testsuite/g++.dg/concepts/no-bool1.C > Modified: > branches/gcc-8-branch/gcc/cp/ChangeLog > branches/gcc-8-branch/gcc/cp/parser.c Thanks a lot for this change! Does this work with -fconcepts and if yes can we also get it for GCC7? Thanks a lot!