最小的例子:#includestructB{constexprstaticconstsize_tMAX=10;};structD:B{constexprstaticconstsize_tMAX=20;};voiduse(constB&v){static_assert(v.MAX==10,"");}templatevoiduse2(X&&v){static_assert(v.templateMAX==20,"");}intmain(){Dd;static_assert(d.MAX==20,"");use(d);use2(d);return0;}GCC(v5.4...v7.3):编译良好(