Function forwardDeclarations

plugins/clang/duchain/unknowndeclarationproblem.cpp:409–451

* Construct viable forward declarations for the type name. */

 * Construct viable forward declarations for the type name.
 */
ClangFixits forwardDeclarations(const QVector<Declaration*>& matchingDeclarations, const Path& source)
{
    DUChainReadLocker lock;
    ClangFixits fixits;
    for (const auto decl : matchingDeclarations) {
        const auto qid = decl->qualifiedIdentifier();

        if (qid.count() > 1) {
            // TODO: Currently we're not able to determine what is namespaces, class names etc
            // and makes a suitable forward declaration, so just suggest "vanilla" declarations.
            continue;
        }

        const auto range = forwardDeclarationPosition(qid, source);
        if (!range.isValid()) {
            continue; // do not know where to insert
        }

        if (const auto classDecl = dynamic_cast<ClassDeclaration*>(decl)) {
            const auto name = qid.last().toString();

            switch (classDecl->classType()) {
            case ClassDeclarationData::Class:
                fixits += {
                    QLatin1String("class ") + name + QLatin1String(";\n"), range,
                    i18n("Forward declare as 'class'"),
                    QString()
                };
                break;
            case ClassDeclarationData::Struct:
                fixits += {
                    QLatin1String("struct ") + name + QLatin1String(";\n"), range,
                    i18n("Forward declare as 'struct'"),
                    QString()
                };
                break;
            default:
                break;
            }
        }
    }
    return fixits;
}

/**
 * Search the persistent symbol table for matching declarations for identifiers @p identifiers