decl.c (duplicate_decls): Use DECL_SOURCE_LOCATION in OPT_Wshadow warning_at.

decl.c (duplicate_decls): Use DECL_SOURCE_LOCATION in OPT_Wshadow warning_at.

/cp
2018-06-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (duplicate_decls): Use DECL_SOURCE_LOCATION in
	OPT_Wshadow warning_at.
	(grokfndecl): Consistently use the location_t argument in
	literal operator diagnostic messages.
	(grokdeclarator): Use declspecs->locations[ds_storage_class]
	in error_at call.
	* decl2.c (finish_static_data_member_decl): Use DECL_SOURCE_LOCATION
	in permerror call.

/testsuite
2018-06-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/other/static3.C: New.
	* g++.dg/other/static4.C: Likewise.
	* g++.dg/warn/Wshadow-15.C: Likewise.
	* g++.dg/cpp0x/gnu_fext-numeric-literals.C: Test locations too.
	* g++.dg/cpp0x/std_fext-numeric-literals.C: Likewise.
	* g++.dg/cpp0x/std_fno-ext-numeric-literals.C: Likewise.
	* g++.dg/cpp0x/udlit-args-neg.C: Likewise.
	* g++.dg/cpp0x/udlit-clink-neg.C: Likewise.
	* g++.dg/cpp0x/udlit-extern-c.C: Likewise.
	* g++.dg/cpp0x/udlit-member-neg.C: Likewise.

From-SVN: r261601