https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56973
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Thu Sep 28 19:39:45 2017 New Revision: 253266 URL: https://gcc.gnu.org/viewcvs?rev=253266&root=gcc&view=rev Log: PR c++/56973, DR 696 - capture constant variables only as needed. * expr.c (mark_use): Split out from mark_rvalue_use and mark_lvalue_use. Handle lambda capture of constant variables. (mark_lvalue_use_nonread): New. * semantics.c (process_outer_var_ref): Don't capture a constant variable until forced. * pt.c (processing_nonlambda_template): New. * call.c (build_this): Check it. * decl2.c (grok_array_decl): Call mark_rvalue_use and mark_lvalue_use_nonread. * init.c (constant_value_1): Don't call mark_rvalue_use. * typeck.c (build_static_cast): Handle lambda capture. Added: trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const6.C trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const7.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/call.c trunk/gcc/cp/cp-tree.h trunk/gcc/cp/decl2.c trunk/gcc/cp/expr.c trunk/gcc/cp/init.c trunk/gcc/cp/pt.c trunk/gcc/cp/semantics.c trunk/gcc/cp/typeck.c trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-64462.C trunk/gcc/testsuite/g++.dg/cpp1y/lambda-generic-const4.C
