Implement codeComplete for cling

lib/Interpreter/Compatibility.h

@@ -73,6 +73,34 @@ getSymbolAddress(const cling::Interpreter& I, llvm::StringRef IRName) {
   Names.push_back(Jit.getExecutionSession().intern(IRName));
   return llvm::make_error<llvm::orc::SymbolsNotFound>(Names);
 }
+
+inline void codeComplete(cling::Interpreter& I, const char* code, std::vector<std::string>& Results) {
+  std::vector<std::string> results;
+  cling::Interpreter::CompilationResult compilation_result;
+
+  compilation_result = I.codeComplete(code, std::string(code).size() + 1, results);
+
+  for (auto& r : results) {
+    printf("!!!%s\n", r.c_str());
+    //if (r.find(CC.Prefix) == 0)
+      Results.push_back(r);
+  }
+
+/*
+  for (auto& r : result) {
+    // remove the definition at the beginning (for example [#int#])
+    r = std::regex_replace(r, std::regex("\\[\\#.*\\#\\]"), "");
+    // remove the variable name in <#type name#>
+    r = std::regex_replace(r, std::regex("(\\ |\\*)+(\\w+)(\\#\\>)"), "$1$3");
+    // remove unnecessary space at the end of <#type   #>
+    r = std::regex_replace(r, std::regex("\\ *(\\#\\>)"), "$1");
+    // remove <# #> to keep only the type
+    r = std::regex_replace(r, std::regex("\\<\\#([^#>]*)\\#\\>"), "$1");
+  }
+*/
+  //assert(false && "CodeCompletion API is not implemented yet.");
+}
+
 } // namespace compat
 
 #endif // USE_CLING