How do I generate an AST from a string of C++ using Clang?

Question

I am trying to use Clang to manipulate C++ source-code, but I am having trouble discovering the API.

I would like to take a string of C++ source-code and generate an AST from it; something like:

auto myAst = clang::parse("auto x = 1 + 1;");

Is there a minimal working example of this?

You can try with this tutorial: https://github.com/loarabia/Clang-tutorial/wiki/TutorialOrig — LookAheadAtYourTypes, May 17 '16 at 12:24
An alternativethat can parse arbitrary fragments of C++: http://stackoverflow.com/a/9024163/120163 — Ira Baxter, May 17 '16 at 12:32

score 2 · Accepted Answer · answered Nov 07 '16 at 05:47

You can try the next code:

std::unique_ptr<ASTUnit> AST(tooling::buildASTFromCode("auto x = 1 + 1;"));
TranslationUnitDecl *DC = AST->getASTContext().getTranslationUnitDecl();
if (DC) {
   llvm::errs() << "---------dump begin----------\n";
   DC->dump();
   llvm::errs() << "---------dump end----------\n";
}

How do I generate an AST from a string of C++ using Clang?

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