code complete not working for unsaved file

Hello.

I’ve found code complete is not working (via libclang-c) for unsaved files (but works great for saved files).

Code (not all):

// 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=%i\n”, &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 results\n”);
}

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;
}

Source file (saved file, is exactly equals to unsaved file content):
struct TempStruct { int a; bool b; }; int main() { TempStruct str; str. /complete here/ return 1; }

Output:

Starting ----

command-line file: …/test/test_complete.cpp =============
TU=0x7fff5d75aaf0, file=…/test/test_complete.cpp complete at line=1, column=72
results=[0x7fec7b509510, count=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)

unsaved file =============
TU=0x7fff5d75aaf0, file=temp.cpp complete at line=1, column=72
results=[0x7fec7b5043d0, count=0]

Any thoughts what’s wrong?

Anton

Anyone? Should i create bug?

My bad: i forgot to set length of unsaved file content:
unsavedFile->Length = strlen((char*)unsavedFile->Contents);

Sorry for noise.

Hi Anton,

I can't help there, but creating a bug is never a bad choice. You can
always refer back to it on future emails.

cheers,
--renato