叮当完全不适用于未保存的文件

我发现代码完整对于未保存的文件不起作用（通过libclang-c）（但对于保存的文件效果很好）。

代码（不是全部）：

// show complete options
void showComplete(CXTranslationUnit TU, char *src_filename, unsigned filesize, CXUnsavedFile *file, int line, int column)
{
    fprintf(stderr, "TU=%p, file=%s complete at line=%i, column=%in", &TU, src_filename, line, column);
    CXCodeCompleteResults *results =
        clang_codeCompleteAt(TU, src_filename, line, column, file, (file == NULL ? 0 : 1), clang_defaultCodeCompleteOptions());
    if (results) {
        fprintf(stderr, "results=[%p, count=%i]n", results->Results, results->NumResults);
        /* Sort the code-completion results based on the typed text. */
      clang_sortCodeCompletionResults(results->Results, results->NumResults);
      for (int i = 0; i < results->NumResults; i++)
        print_completion_result(results->Results + i, stdout);
    } else {
        fprintf(stderr, "no complete resultsn");
    }
    clang_disposeCodeCompleteResults(results);
}
int main(int argc, char** argv)
{
    std::cout << "Starting ----" << std::endl;
    CXIndex index = clang_createIndex(false, false);
    char * filename = argv[1];
    fprintf(stderr, "ncommand-line file: %s =============n", filename);
    CXTranslationUnit commandLineTu = clang_parseTranslationUnit(index, filename, 0, 0, 0, 0, CXTranslationUnit_None);
    showComplete(commandLineTu, filename, 0, NULL, 1, 72);
    clang_disposeTranslationUnit(commandLineTu);
    // unsaved file tu
    fprintf(stderr, "nunsaved file =============n");
    CXUnsavedFile *unsavedFile = new CXUnsavedFile;
    unsavedFile->Filename = "temp.cpp";
    unsavedFile->Contents = "struct TempStruct { int a; bool b; }; int main() { TempStruct str; str. /*complete here*/ return 1; }";
    CXTranslationUnit in_memory_tu = clang_parseTranslationUnit(index, unsavedFile->Filename, NULL, 0, unsavedFile, 1, CXTranslationUnit_None);
    int column = strchr(unsavedFile->Contents, '.') - unsavedFile->Contents + 1 + 1; // + 1 (length of '.') + 1 (next symbol)
    showComplete(in_memory_tu, (char*)unsavedFile->Filename, strlen(unsavedFile->Contents), unsavedFile, 1, column);
    clang_disposeTranslationUnit(in_memory_tu);
    clang_disposeIndex(index);
    return 0;
}

源文件（保存的文件，正好等于未保存的文件内容）：

struct TempStruct { int a; bool b; }; int main() { TempStruct str; str. /*complete here*/ return 1; }

输出：

开始----命令行文件：../test/test_complete.cpp =============TU=0x7fff5d75aaf0，文件=../test/test_complete.cpp 完成于行=1，列=72结果=[0x7fec7b509510，计数=5]FieldDecl：{ResultType int}{TypedText a} （35） FieldDecl：{ResultType bool}{TypedText b} （35）CXXMethod：{ResultType TempStruct &}{TypedText operator=}{LeftParen（}{Placeholder const tempStruct &}{RightParen ）} （34）StructDecl：{TypedText TempStruct}{Text ：：} （75）CXXDestructor：{ResultType void}{TypedText ~TempStruct}{LeftParen（}{RightParen ）} （34）未保存的文件 =============TU=0x7fff5d75aaf0，文件=temp.cpp完成于行=1，列=72结果=[0x7fec7b5043d0，计数=0]

有什么想法吗？