Minimal libclang test code

test.cpp

// clang test.cpp -lclang -o ./test && ./test
// gcc test.cpp -lclang -o ./test && ./test
#include "clang-c/Index.h"
#include <stdio.h>

int main(int argc, char** argv)
{
    CXIndex idx = clang_createIndex(1, 0);
    const char *clangargs[] =
    {
        "-I.",
        "-x", "c++"
    };

    // Parse the source file into a translation unit
    CXTranslationUnit tu = clang_parseTranslationUnit(idx,
        "test.cpp",
        clangargs, sizeof(clangargs)/sizeof(char*),
        NULL, 0,
        CXTranslationUnit_PrecompiledPreamble);

    if (!tu)
    {
        printf("Couldn't parse tu\n");
        clang_disposeIndex(idx);
        return 1;
    }

    // Perform a code completion operation
    CXCodeCompleteResults* results = clang_codeCompleteAt(tu, "test.cpp", 10, 1, NULL, 0, clang_defaultCodeCompleteOptions());
    if (results)
    {
        clang_sortCodeCompletionResults(results->Results, results->NumResults);
        for (int i = 0; i < results->NumResults; i++)
        {
            CXCompletionString &compString = results->Results[i].CompletionString;
            for (int j = 0; j < clang_getNumCompletionChunks(compString); j++)
            {
                CXString s = clang_getCompletionChunkText(compString, j);
                printf("%s ", clang_getCString(s));
                clang_disposeString(s);
            }
            printf("\n");
        }
        clang_disposeCodeCompleteResults(results);
    }
    else
    {
        printf("Failed to perform completion operation\n");
    }

    // Show any diagnostic information if available
    for (unsigned int i = 0; i < clang_getNumDiagnostics(tu); i++)
    {
        CXDiagnostic diag = clang_getDiagnostic(tu, i);
        CXString s = clang_getDiagnosticSpelling(diag);
        printf("%s\n", clang_getCString(s));
        clang_disposeString(s);
        clang_disposeDiagnostic(diag);
    }
    printf("Total diagnostics available: %d\n", clang_getNumDiagnostics(tu));
    clang_disposeTranslationUnit(tu);
    clang_disposeIndex(idx);

    return 0;
}