3 commits

Author	SHA1	Message	Date
Eelco Dolstra	95f4f2cf61	* If std::tr1::unordered_set is unavailable, use std::set.	2010-10-04 16:16:19 +00:00
Eelco Dolstra	816f9c0f6f	* Use std::tr1::unordered_set instead of std::set for the symbol ... table. This gives a 10% speed increase on `nix-instantiate /etc/nixos/nixos -A system --readonly-mode'.	2010-04-13 14:34:11 +00:00
Eelco Dolstra	ac1e8f40d4	* Use a symbol table to represent identifiers and attribute names ... efficiently. The symbol table ensures that there is only one copy of each symbol, thus allowing symbols to be compared efficiently using a pointer equality test.	2010-04-13 12:25:42 +00:00