问题
I want to create an expr object from a given SMTLIB2 file. I can see a Z3_parse_smtlib_string function in the C examples. Is there a wrapper for that in the expr class?
回答1:
The Z3 C++ API does not explicitly provide this functionality as part of the expr class. However, the C++ API can be used alongside the C API, i.e., the function Z3_parse_smtlib_string (or ..._file) can be used to achieve this. Note that this function returns a Z3_ast, which must be converted to an expr object to get back to the C++ "world".
A simple example:
#include <z3++.h>
...
context ctx;
Z3_ast a = Z3_parse_smtlib2_file(ctx, "test.smt2", 0, 0, 0, 0, 0, 0);
expr e(ctx, a);
std::cout << "Result = " << e << std::endl;
Since the Z3_parse_smtlib2_* functions do not perform error checking, no exception will be thrown upon errors. This can be achieved by calls to context::check_error().
来源：https://stackoverflow.com/questions/12570784/how-to-read-smtlib2-strings-using-z3-c-api