wip - dependent expr simpliifer

- simplify iterator over current indices
- add more simplifiers used by asserted_formulas
- improve diagnostics printing

src/ast/simplifiers/pull_nested_quantifiers.h

@@ -0,0 +1,46 @@
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    pull_nested_quantifiers.h
+
+Abstract:
+
+    pull nested quantifiers
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2022-11-24
+
+--*/
+
+#pragma once
+
+#include "ast/simplifiers/dependent_expr_state.h"
+#include "ast/normal_forms/pull_quant.h"
+
+
+class pull_nested_quantifiers_simplifier : public dependent_expr_simplifier {
+    pull_nested_quant      m_pull;
+
+public:
+    pull_nested_quantifiers_simplifier(ast_manager& m, params_ref const& p, dependent_expr_state& fmls):
+        dependent_expr_simplifier(m, fmls),
+        m_pull(m) {
+    }
+
+    char const* name() const override { return "pull-nested-quantifiers"; }
+        
+    void reduce() override {
+        if (!m_fmls.has_quantifiers())
+            return;
+        expr_ref   new_curr(m);
+        proof_ref  new_pr(m);
+        for (unsigned idx : indices()) {
+            auto d = m_fmls[idx];
+            m_pull(d.fml(), new_curr, new_pr);
+            m_fmls.update(idx, dependent_expr(m, new_curr, d.dep()));
+        }
+    }
+};