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gdb's copy of basic_string_view includes a to_string method. However, according to cppreference, this is not a method on the real std::basic_string_view: https://en.cppreference.com/w/cpp/string/basic_string_view This difference matters because gdb_string_view.h will use the standard implementation when built with a C++17 or later. This caused PR build/26183. This patch fixes the problem by changing the method to be a standalone helper function, and then rewriting the uses. Tested by rebuilding with a version of GCC that defaults to C++17. (Note that the build still is not clean; and also I noticed that the libstdc++ string_view forbids the use of nullptr ... I wonder if gdb violates that.) gdb/ChangeLog 2020-06-30 Tom Tromey <tromey@adacore.com> PR build/26183: * ada-lang.c (ada_lookup_name_info::ada_lookup_name_info): Use gdb::to_string. gdbsupport/ChangeLog 2020-06-30 Tom Tromey <tromey@adacore.com> PR build/26183: * gdb_string_view.h (basic_string_view::to_string): Remove. (gdb::to_string): New function.
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