wip - dependent expr simpliifer

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

src/ast/simplifiers/distribute_forall.h

@@ -0,0 +1,45 @@
+
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    distribute_forall.h
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2022-11-24
+
+--*/
+
+#pragma once
+
+#include "ast/simplifiers/dependent_expr_state.h"
+#include "ast/rewriter/distribute_forall.h"
+
+
+class distribute_forall_simplifier : public dependent_expr_simplifier {
+    distribute_forall m_dist;
+    
+public:
+    distribute_forall_simplifier(ast_manager& m, params_ref const& p, dependent_expr_state& fmls):
+        dependent_expr_simplifier(m, fmls),
+        m_dist(m) {
+    }
+
+    char const* name() const override { return "distribute-forall"; }
+        
+    void reduce() override {
+        if (!m_fmls.has_quantifiers())
+            return;
+        expr_ref r(m);
+        for (unsigned idx : indices()) {
+            auto const& d = m_fmls[idx];
+            if (!has_quantifiers(d.fml()))
+                continue;
+            m_dist(d.fml(), r);
+            m_fmls.update(idx, dependent_expr(m, r, d.dep()));
+        }
+    }
+};
+