main.c

-

#include <clang-c/Index.h>
#include <stdio.h>
#include <stdlib.h>

void printCodeCompletionSuggestions(CXTranslationUnit tu, char* source, unsigned line, unsigned column) {
  struct CXUnsavedFile *unsavedFiles = NULL;
  unsigned numUnsavedFiles = 0;
  unsigned options = clang_defaultCodeCompleteOptions();
  CXCodeCompleteResults *results = clang_codeCompleteAt(tu, source, line, column, unsavedFiles, numUnsavedFiles, options);
  unsigned numResults = results->NumResults;
  printf("Num completions: %d\n", numResults);

  CXCompletionResult *result = results->Results;
  for (unsigned i = 0; i < numResults; i++) {
    CXCompletionString completionString = result[i].CompletionString;
    unsigned priority = clang_getCompletionPriority(completionString);
    // With the cursor at the end of this line:
    //
    // NSL
    //
    // The priority of NSLog is 50, which seems much higher than it should be.
    if (priority > 50) {
      continue;
    }

    unsigned numChunks = clang_getNumCompletionChunks(completionString);
    unsigned numAnnotations = clang_getCompletionNumAnnotations(completionString);
    printf("Result %d (priority=%d, chunks=%d, annotations=%d)\n", i, priority, numChunks, numAnnotations);

    for (unsigned chunkNumber = 0; chunkNumber < numChunks; chunkNumber++) {
      CXString chunk = clang_getCompletionChunkText(completionString, chunkNumber);
      enum CXCompletionChunkKind kind = clang_getCompletionChunkKind(completionString, chunkNumber);

      printf("%s kind=%d\n", clang_getCString(chunk), kind);
      clang_disposeString(chunk);
    }
    printf("\n");
  }

  clang_disposeCodeCompleteResults(results);
}


int main(int argc, char **argv) {
  char* source = argv[1];
  unsigned line = atoi(argv[2]);
  unsigned column = atoi(argv[3]);

  CXIndex index = clang_createIndex(
      /* excludeDeclarationsFromPCH */ 0,
      /* displayDiagnostics */ 0);
  const char *args[] = {
    "-isysroot",
    "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk",
  };
  int numArgs = sizeof(args) / sizeof(*args);
  CXTranslationUnit tu = clang_parseTranslationUnit(index, source, args, numArgs, NULL, 0, CXTranslationUnit_None);

  printCodeCompletionSuggestions(tu, source, line, column);

  clang_disposeTranslationUnit(tu);
  clang_disposeIndex(index);
  return 0;
}