Akim Demaille bd07c76b0a c++: avoid GCC 8 warnings ...

GCC 8 issues warnings whose root cause was a bit hard to find.

    calc.cc: In member function 'virtual int yy::parser::parse()':
    calc.cc:810:18: warning: '*((void*)&<anonymous> +8)' may be used uninitialized in this function [-Wmaybe-uninitialized]
         , location (l)
                      ^
    calc.cc: In member function 'void yy::parser::yypush_(const char*, yy::parser::stack_symbol_type&)':
    calc.cc:810:18: warning: '*((void*)&<anonymous> +8)' may be used uninitialized in this function [-Wmaybe-uninitialized]
         , location (l)
                      ^
    calc.cc: In member function 'void yy::parser::yypush_(const char*, yy::parser::state_type, yy::parser::symbol_type&)':
    calc.cc:810:18: warning: '*((void*)&<anonymous> +8)' may be used uninitialized in this function [-Wmaybe-uninitialized]
         , location (l)
                      ^

The problem is with locations that don't have a constructor, such as
Span (in calc.cc) which is POD.  It is POD on purpose: so that we can
use that structure to test glr.cc which cannot use non POD in its
(C) stacks.

* data/c++.m4 (basic_symbol): Also ensure that 'location' is
initialized.

2018-08-15 19:23:00 +02:00

18 KiB

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