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add bit-vector extract shortcuts to C++ API

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Signed-off-by: nikolajbjorner <nbjorner@microsoft.com>
This commit is contained in:
nikolajbjorner 2015-02-27 11:08:49 -08:00
parent f0967c0572
commit 3ca3c948cf
2 changed files with 13 additions and 0 deletions
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10
examples/c++/example.cpp
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@ -975,6 +975,15 @@ void substitute_example() {
std::cout << new_f << std::endl; std::cout << new_f << std::endl;
} }
void extract_example() {
std::cout << "extract example\n";
context c;
expr x(c);
x = c.constant("x", c.bv_sort(32));
expr y = x.extract(21, 10);
std::cout << y << " " << y.hi() << " " << y.lo() << "\n";
}
int main() { int main() {
try { try {
demorgan(); std::cout << "\n"; demorgan(); std::cout << "\n";
@ -1013,6 +1022,7 @@ int main() {
expr_vector_example(); std::cout << "\n"; expr_vector_example(); std::cout << "\n";
exists_expr_vector_example(); std::cout << "\n"; exists_expr_vector_example(); std::cout << "\n";
substitute_example(); std::cout << "\n"; substitute_example(); std::cout << "\n";
extract_example(); std::cout << "\n";
std::cout << "done\n"; std::cout << "done\n";
} }
catch (exception & ex) { catch (exception & ex) {

3
src/api/c++/z3++.h
View file

@ -866,6 +866,9 @@ namespace z3 {
friend expr operator|(int a, expr const & b) { return b.ctx().num_val(a, b.get_sort()) | b; } friend expr operator|(int a, expr const & b) { return b.ctx().num_val(a, b.get_sort()) | b; }
friend expr operator~(expr const & a) { Z3_ast r = Z3_mk_bvnot(a.ctx(), a); return expr(a.ctx(), r); } friend expr operator~(expr const & a) { Z3_ast r = Z3_mk_bvnot(a.ctx(), a); return expr(a.ctx(), r); }
expr extract(unsigned hi, unsigned lo) const { Z3_ast r = Z3_mk_extract(ctx(), hi, lo, *this); return expr(ctx(), r); }
unsigned lo() const { assert (is_app() && Z3_get_decl_num_parameters(ctx(), decl()) == 2); return static_cast<unsigned>(Z3_get_decl_int_parameter(ctx(), decl(), 1)); }
unsigned hi() const { assert (is_app() && Z3_get_decl_num_parameters(ctx(), decl()) == 2); return static_cast<unsigned>(Z3_get_decl_int_parameter(ctx(), decl(), 0)); }
/** /**
\brief Return a simplified version of this expression. \brief Return a simplified version of this expression.