glr2.cc: start the transition to using symbol_type
Currently glr2.cc uses three variables/struct members to denote the
symbols' kind (or state), value and location. lalr1.cc has two types
for "complete" symbols: symbol_type and stack_symbol_type. Let's use
that model in glr2.cc too.
For a start use yyla (a symbol_type) to denote the lookahead, instead
of the triple yytoken, yylval and yylloc. This will make easier the
introduction of the "context" subclass, used in parse.error=custom.
It simplifies the code in several places. For instance from:
symbol_kind_type yytoken_current = this->yytoken;]b4_variant_if([[
value_type yylval_current;
]b4_symbol_variant([this->yytoken],
[yylval_current], [move], [this->yylval])], [[
value_type yylval_current = this->yylval;]])[]b4_locations_if([
location_type yylloc_current = this->yylloc;])[
to:
symbol_type yyla_current = std::move (this->yyla);
* data/skeletons/glr2.cc (yytoken, yylval, yylloc): Replace by...
(yyla): this.
Adjust all dependencies.
(yyloc_default): Remove, unused.
* tests/c++.at, tests/glr-regression.at, tests/types.at: C++11 is
required for glr2.cc.
Adjust to changes in glr2.cc.