Function classDeclarationForContext

plugins/clang/codecompletion/context.cpp:724–751

If any parent of this context is a class, the closest class declaration is returned, nullptr otherwise

/// If any parent of this context is a class, the closest class declaration is returned, nullptr otherwise
Declaration* classDeclarationForContext(const DUContextPointer& context, const CursorInRevision& position)
{
    auto parent = context;
    while (parent) {
        if (parent->type() == DUContext::Class) {
            break;
        }

        if (auto owner = parent->owner()) {
            // Work-around for out-of-line methods. They have Helper context instead of Class context
            if (owner->context() && owner->context()->type() == DUContext::Helper) {
                auto qid = owner->qualifiedIdentifier();
                qid.pop();

                QSet<Declaration*> tmp;
                auto decl = findDeclaration(qid, context, position, tmp);

                if (decl && decl->internalContext() && decl->internalContext()->type() == DUContext::Class) {
                    parent = decl->internalContext();
                    break;
                }
            }
        }
        parent = parent->parentContext();
    }

    return parent ? parent->owner() : nullptr;
}

class LookAheadItemMatcher
{