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54 commits

Author SHA1 Message Date
Leonardo de Moura
3e1fd06903 refactor(kernel/expr): remove 'null' expression, and operator bool for expression 
After this commit, a value of type 'expr' cannot be a reference to nullptr.
This commit also fixes several bugs due to the use of 'null' expressions.

TODO: do the same for kernel objects, sexprs, etc.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-07 23:21:10 -08:00
Leonardo de Moura
195ea24d71 refactor(kernel/type_checker): pass buffer<unification_constraint> as a pointer 
The idea is to make it an optional parameter independent of metavar_env.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-07 10:27:11 -08:00
Leonardo de Moura
0c059a9917 feat(library/tactic): use _tac suffix instead of _tactic like Isabelle 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 20:06:32 -08:00
Leonardo de Moura
029ef57abd feat(library/tactic): add apply_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 03:22:12 -08:00