[C] Visit Global StructType

Author: Thirumalai-Shaktivel

src/libasr/codegen/asr_to_c.cpp

@@ -645,6 +645,32 @@ R"(
             array_types_decls += src;
         }
 
+        if (x.m_global_scope->get_symbol("_global_symbols") != nullptr) {
+            struct_dep_graph.clear();
+            SymbolTable *global_symbols = ASR::down_cast<ASR::Module_t>(
+                x.m_global_scope->get_symbol("_global_symbols"))->m_symtab;
+            for (auto &item : global_symbols->get_scope()) {
+                if (ASR::is_a<ASR::StructType_t>(*item.second) ||
+                        ASR::is_a<ASR::EnumType_t>(*item.second) ||
+                        ASR::is_a<ASR::UnionType_t>(*item.second)) {
+                    std::vector<std::string> struct_deps_vec;
+                    std::pair<char**, size_t> struct_deps_ptr = ASRUtils::symbol_dependencies(item.second);
+                    for( size_t i = 0; i < struct_deps_ptr.second; i++ ) {
+                        struct_deps_vec.push_back(std::string(struct_deps_ptr.first[i]));
+                    }
+                    struct_dep_graph[item.first] = struct_deps_vec;
+                }
+            }
+
+            std::vector<std::string> struct_deps = ASRUtils::order_deps(struct_dep_graph);
+
+            for (auto &item : struct_deps) {
+                ASR::symbol_t* struct_sym = global_symbols->get_symbol(item);
+                visit_symbol(*struct_sym);
+                array_types_decls += src;
+            }
+        }
+
         // Topologically sort all global functions
         // and then define them in the right order
         std::vector<std::string> global_func_order = ASRUtils::determine_function_definition_order(x.m_global_scope);