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cb823b6f0c
There are two issues to handle: first scanning nested angle bracket pairs to support types such as std::pair< std::string, std::list<std::string> > >. Another issue is to address idiosyncracies of C++: do not glue two closing angle brackets together (otherwise it's operator>>), and avoid sticking blindly a TYPE to the opening <, as it can result in '<:' which is a digraph for '['. * src/scan-gram.l (brace_level): Rename as... (nesting): this. (SC_TAG): New. Implement support for complex tags. (tag): Accept \n, but not <. * data/lalr1.cc (b4_symbol_value, b4_symbol_value_template) (b4_symbol_variant): Leave space around types as parameters. * examples/variant.yy: Use nested template types and leading ::. * src/parse-gram.y (TYPE, TYPE_TAG_ANY, TYPE_TAG_NONE, type.opt): Rename as... (TAG, TAG_ANY, TAG_NONE, tag.opt): these. * tests/c++.at: Test parametric types.