diagnostic.cpp

extern "C" {
#include "clang-c/Index.h"
}
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

static cl::opt<std::string> FileName(cl::Positional, cl::desc("Input file"), cl::Required);

int
main(int argc, char** argv)
{
    cl::ParseCommandLineOptions(argc, argv, "Diagnostics Example");
    CXIndex index = clang_createIndex(0, 0);
    const char *args[] = {
        "-I/usr/include",
        "-I."
    };
    CXTranslationUnit translationUnit = clang_parseTranslationUnit(index, FileName.c_str(), args, 2, NULL, 0, CXTranslationUnit_None);
    unsigned int diagnosticCount = clang_getNumDiagnostics(translationUnit);
    for (unsigned int i = 0; i < diagnosticCount; i++)
    {
        CXDiagnostic diagnostic = clang_getDiagnostic(translationUnit, i);
        CXString category = clang_getDiagnosticCategoryText(diagnostic);
        CXString message = clang_getDiagnosticSpelling(diagnostic);
        unsigned severity = clang_getDiagnosticSeverity(diagnostic);
        CXSourceLocation loc = clang_getDiagnosticLocation(diagnostic);
        CXString fName;
        unsigned line = 0, col = 0;
        clang_getPresumedLocation(loc, &fName, &line, &col);

        outs() << "Severity: ";
        switch (severity)
        {
        case CXDiagnostic_Ignored:
            outs() << "Ignored";
            break;
        case CXDiagnostic_Note:
            outs() << "Note";
            break;
        case CXDiagnostic_Warning:
            outs() << "Warning";
            break;
        case CXDiagnostic_Error:
            outs() << "Error";
            break;
        case CXDiagnostic_Fatal:
            outs() << "Fatal";
            break;
        default:
            break;
        }
        outs() << "\n";
        outs() << "In File: " << clang_getCString(fName) << "\n";
        outs() << "Problem in line: " << line << " and column: " << col << "\n";
        outs() << "Problem category: " << clang_getCString(category) << "\n";
        outs() << "Information message: " << clang_getCString(message) << "\n\n";

        clang_disposeString(fName);
        clang_disposeString(message);
        clang_disposeString(category);
        clang_disposeDiagnostic(diagnostic);
    }

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