Add support for printing spacer pobs in JSON

src/muz/spacer/spacer_json.h

@@ -0,0 +1,68 @@
+/**++
+Copyright (c) 2017 Microsoft Corporation and Matteo Marescotti
+
+Module Name:
+
+    spacer_json.h
+
+Abstract:
+
+    SPACER json marshalling support
+
+Author:
+
+    Matteo Marescotti
+
+Notes:
+
+--*/
+
+#ifndef Z3_SPACER_JSON_H
+#define Z3_SPACER_JSON_H
+
+#include<iostream>
+#include<map>
+#include "ref.h"
+#include "ref_vector.h"
+
+class ast;
+
+class ast_manager;
+
+namespace spacer {
+
+    class lemma;
+
+    typedef sref_vector<lemma> lemma_ref_vector;
+
+    class context;
+
+    class pob;
+
+    typedef ref<pob> pob_ref;
+
+    std::ostream &json_marshal(std::ostream &out, ast *t, ast_manager &m);
+
+    std::ostream &json_marshal(std::ostream &out, lemma *l);
+
+    std::ostream &json_marshal(std::ostream &out, lemma_ref_vector &lemmas);
+
+
+    class json_marshaller {
+        context *m_ctx;
+        std::map<pob_ref, std::map<unsigned, lemma_ref_vector>> m_relations;
+
+    public:
+        json_marshaller(context *ctx) : m_ctx(ctx) {}
+
+        void pob_blocked_by_lemma_eh(pob *p, lemma *l);
+
+        void new_pob_eh(pob *p);
+
+        std::ostream &marshal(std::ostream &out) const;
+    };
+
+}
+
+
+#endif //Z3_SPACER_JSON_H