Factor out cp_ident_is_alpha/cp_ident_is_alnum out of
gdb/cp-name-parser.y and use it in the C/C++ expression parser too.
New test included.
gdb/ChangeLog:
2018-05-22 Pedro Alves <palves@redhat.com>
張俊芝 <zjz@zjz.name>
PR gdb/22973
* c-exp.y: Include "c-support.h".
(parse_number, c_parse_escape, lex_one_token): Use TOLOWER instead
of tolower. Use c_ident_is_alpha to scan names.
* c-lang.c: Include "c-support.h".
(convert_ucn, convert_octal, convert_hex, convert_escape): Use
ISXDIGIT instead of isxdigit and ISDIGIT instead of isdigit.
* c-support.h: New file, with bits factored out from ...
* cp-name-parser.y: ... this file.
Include "c-support.h".
(cp_ident_is_alpha, cp_ident_is_alnum): Deleted, moved to
c-support.h and renamed.
(symbol_end, yylex): Adjust.
gdb/testsuite/ChangeLog:
2018-05-22 Pedro Alves <palves@redhat.com>
PR gdb/22973
* gdb.base/utf8-identifiers.c: New file.
* gdb.base/utf8-identifiers.exp: New file.
Pedro Alves