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Cherry-pick goodies from mcsat branch

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2013-06-27 09:19:23 -07:00
parent 42898f3276
commit f238720b76
2 changed files with 84 additions and 0 deletions
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31
src/ast/ast_util.h
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@ -95,5 +95,36 @@ bool is_clause(ast_manager & m, expr * n);
unsigned get_clause_num_literals(ast_manager & m, expr * cls);
expr * get_clause_literal(ast_manager & m, expr * cls, unsigned idx);
// -----------------------------------
//
// Goodies for creating Boolean expressions
//
// -----------------------------------
/**
Return (and args[0] ... args[num_args-1]) if num_args >= 2
Return args[0] if num_args == 1
Return true if num_args == 0
*/
expr * mk_and(ast_manager & m, unsigned num_args, expr * const * args);
/**
Return (or args[0] ... args[num_args-1]) if num_args >= 2
Return args[0] if num_args == 1
Return false if num_args == 0
*/
expr * mk_or(ast_manager & m, unsigned num_args, expr * const * args);
/**
Return a if arg = (not a)
Retur (not arg) otherwise
*/
expr * mk_not(ast_manager & m, expr * arg);
/**
Return the expression (and (not (= args[0] args[1])) (not (= args[0] args[2])) ... (not (= args[num_args-2] args[num_args-1])))
*/
expr * expand_distinct(ast_manager & m, unsigned num_args, expr * const * args);
#endif /* _AST_UTIL_H_ */