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add and use new is_pattern recognizer

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This commit is contained in:
Doug Woos 2017-02-01 16:21:15 -08:00
parent 44c417904b
commit d6fbfe401e
3 changed files with 22 additions and 2 deletions
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16
src/ast/ast.cpp
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@ -2326,6 +2326,22 @@ bool ast_manager::is_pattern(expr const * n) const {
return true;
}
bool ast_manager::is_pattern(expr const * n, ptr_vector<expr> &args) {
if (!is_app_of(n, m_pattern_family_id, OP_PATTERN)) {
return false;
}
for (unsigned i = 0; i < to_app(n)->get_num_args(); ++i) {
expr *arg = to_app(n)->get_arg(i);
if (!is_app(arg)) {
return false;
}
args.push_back(arg);
}
return true;
}
quantifier * ast_manager::mk_quantifier(bool forall, unsigned num_decls, sort * const * decl_sorts, symbol const * decl_names,
expr * body, int weight , symbol const & qid, symbol const & skid,
unsigned num_patterns, expr * const * patterns,

2
src/ast/ast.h
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@ -1840,6 +1840,8 @@ public:
bool is_pattern(expr const * n) const;
bool is_pattern(expr const *n, ptr_vector<expr> &args);
public:
quantifier * mk_quantifier(bool forall, unsigned num_decls, sort * const * decl_sorts, symbol const * decl_names, expr * body,

6
src/tactic/sine_filter.cpp
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@ -111,10 +111,12 @@ private:
bool matched = false;
for (int i = 0; i < q->get_num_patterns(); i++) {
bool p_matched = true;
vector<expr *> stack;
ptr_vector<expr> stack;
expr *curr;
// patterns are wrapped with "pattern"
stack.push_back(to_app(q->get_pattern(i))->get_arg(0));
if (!m.is_pattern(q->get_pattern(i), stack)) {
continue;
}
while (!stack.empty()) {
curr = stack.back();
stack.pop_back();