2005-08-09 Graydon Hoare <graydon@redhat.com>

	* staptree.{cxx,h}
	(target_symbol): New struct.
	(*_visitor::visit_target_symbol): Support it.
	(visitor::active_lvalues)
	(visitor::is_active_lvalue)
	(visitor::push_active_lvalue)
	(visitor::pop_active_lvalue): Support lvalue-detection.
	(delete_statement::visit)
	(pre_crement::visit)
	(post_crement::visit)
	(assignment::visit): Push and pop lvalue expressions.
	* elaborate.{cxx,h}
	(lvalule_aware_traversing_visitor): Remove class.
	(no_map_mutation_during_iteration_check)
	(mutated_map_collector): Update lvalue logic.
	(typeresolution_info::visit_target_symbol): Add, throw error.
	* parse.{cxx,h}
	(tt2str)
	(tok_is)
	(parser::expect_*)
	(parser::peek_*): New helpers.
	(parser::parse_symbol): Rewrite, support target_symbols.
	* translate.cxx (c_unparser::visit_target_symbol): Implement.
	* tapsets.cxx (var_expanding_copy_visitor): Update lvalue logic,
	change visit_symbol to visit_target_symbol.

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