Esempio n. 1
0
File: dsymbol.c Progetto: olgk/ldc
Dsymbol *ScopeDsymbol::search(Loc loc, Identifier *ident, int flags)
{
    //printf("%s->ScopeDsymbol::search(ident='%s', flags=x%x)\n", toChars(), ident->toChars(), flags);
    //if (strcmp(ident->toChars(),"c") == 0) *(char*)0=0;

    // Look in symbols declared in this module
    Dsymbol *s = symtab ? symtab->lookup(ident) : NULL;
    //printf("\ts = %p, imports = %p, %d\n", s, imports, imports ? imports->dim : 0);

    // hide the aliases generated by selective or renamed private imports
    if (s && flags & 1)
        if (AliasDeclaration* ad = s->isAliasDeclaration())
            // may be a private alias to a function that is overloaded. these
            // are sorted out during overload resolution, accept them here
            if (ad->importprot == PROTprivate && !ad->aliassym->isFuncAliasDeclaration())
                s = NULL;

    if (s)
    {
        //printf("\ts = '%s.%s'\n",toChars(),s->toChars());
    }
    else if (imports)
    {
        // Look in imported modules
        for (size_t i = 0; i < imports->dim; i++)
        {   Dsymbol *ss = (*imports)[i];
            Dsymbol *s2;

            // If private import, don't search it
            if (flags & 1 && prots[i] == PROTprivate)
                continue;

            //printf("\tscanning import '%s', prots = %d, isModule = %p, isImport = %p\n", ss->toChars(), prots[i], ss->isModule(), ss->isImport());
            /* Don't find private members if ss is a module
             */
            s2 = ss->search(loc, ident, ss->isImport() ? 1 : 0);
            if (!s)
                s = s2;
            else if (s2 && s != s2)
            {
                if (s->toAlias() == s2->toAlias())
                {
                    /* After following aliases, we found the same symbol,
                     * so it's not an ambiguity.
                     * But if one alias is deprecated, prefer the other.
                     */
                    if (s->isDeprecated())
                        s = s2;
                }
                else
                {
                    /* Two imports of the same module should be regarded as
                     * the same.
                     */
                    Import *i1 = s->isImport();
                    Import *i2 = s2->isImport();
                    if (!(i1 && i2 &&
                          (i1->mod == i2->mod ||
                           (!i1->parent->isImport() && !i2->parent->isImport() &&
                            i1->ident->equals(i2->ident))
                          )
                         )
                       )
                    {
                        ScopeDsymbol::multiplyDefined(loc, s, s2);
                        break;
                    }
                }
            }
        }
        if (s)
        {
            Declaration *d = s->isDeclaration();
            if (d && d->protection == PROTprivate &&
                !d->parent->isTemplateMixin())
                error(loc, "%s is private", d->toPrettyChars());
        }
    }
    return s;
}
Esempio n. 2
0
Dsymbol *ScopeDsymbol::search(Loc loc, Identifier *ident, int flags)
{
    //printf("%s->ScopeDsymbol::search(ident='%s', flags=x%x)\n", toChars(), ident->toChars(), flags);
    //if (strcmp(ident->toChars(),"c") == 0) *(char*)0=0;

    // Look in symbols declared in this module
    Dsymbol *s = symtab ? symtab->lookup(ident) : NULL;
    //printf("\ts = %p, imports = %p, %d\n", s, imports, imports ? imports->dim : 0);
    if (s)
    {
        //printf("\ts = '%s.%s'\n",toChars(),s->toChars());
    }
    else if (imports)
    {
        OverloadSet *a = NULL;

        // Look in imported modules
        for (size_t i = 0; i < imports->dim; i++)
        {   Dsymbol *ss = (*imports)[i];
            Dsymbol *s2;

            // If private import, don't search it
            if (flags & 1 && prots[i] == PROTprivate)
                continue;

            //printf("\tscanning import '%s', prots = %d, isModule = %p, isImport = %p\n", ss->toChars(), prots[i], ss->isModule(), ss->isImport());
            /* Don't find private members if ss is a module
             */
            s2 = ss->search(loc, ident, ss->isModule() ? 1 : 0);
            if (!s)
                s = s2;
            else if (s2 && s != s2)
            {
                if (s->toAlias() == s2->toAlias() ||
                    s->getType() == s2->getType() && s->getType())
                {
                    /* After following aliases, we found the same
                     * symbol, so it's not an ambiguity.  But if one
                     * alias is deprecated or less accessible, prefer
                     * the other.
                     */
                    if (s->isDeprecated() ||
                        s2->prot() > s->prot() && s2->prot() != PROTnone)
                        s = s2;
                }
                else
                {
                    /* Two imports of the same module should be regarded as
                     * the same.
                     */
                    Import *i1 = s->isImport();
                    Import *i2 = s2->isImport();
                    if (!(i1 && i2 &&
                          (i1->mod == i2->mod ||
                           (!i1->parent->isImport() && !i2->parent->isImport() &&
                            i1->ident->equals(i2->ident))
                          )
                         )
                       )
                    {
                        /* Bugzilla 8668:
                         * Public selective import adds AliasDeclaration in module.
                         * To make an overload set, resolve aliases in here and
                         * get actual overload roots which accessible via s and s2.
                         */
                        s = s->toAlias();
                        s2 = s2->toAlias();

                        /* If both s2 and s are overloadable (though we only
                         * need to check s once)
                         */
                        if (s2->isOverloadable() && (a || s->isOverloadable()))
                        {   if (!a)
                                a = new OverloadSet(s->ident);
                            /* Don't add to a[] if s2 is alias of previous sym
                             */
                            for (size_t j = 0; j < a->a.dim; j++)
                            {   Dsymbol *s3 = a->a[j];
                                if (s2->toAlias() == s3->toAlias())
                                {
                                    if (s3->isDeprecated() ||
                                        s2->prot() > s3->prot() && s2->prot() != PROTnone)
                                        a->a[j] = s2;
                                    goto Lcontinue;
                                }
                            }
                            a->push(s2);
                        Lcontinue:
                            continue;
                        }
                        if (flags & 4)          // if return NULL on ambiguity
                            return NULL;
                        if (!(flags & 2))
                            ScopeDsymbol::multiplyDefined(loc, s, s2);
                        break;
                    }
                }
            }
        }

        /* Build special symbol if we had multiple finds
         */
        if (a)
        {   assert(s);
            a->push(s);
            s = a;
        }

        if (s)
        {
            if (!(flags & 2))
            {   Declaration *d = s->isDeclaration();
                if (d && d->protection == PROTprivate &&
                    !d->parent->isTemplateMixin())
                    error(loc, "%s is private", d->toPrettyChars());

                AggregateDeclaration *ad = s->isAggregateDeclaration();
                if (ad && ad->protection == PROTprivate &&
                    !ad->parent->isTemplateMixin())
                    error(loc, "%s is private", ad->toPrettyChars());

                EnumDeclaration *ed = s->isEnumDeclaration();
                if (ed && ed->protection == PROTprivate &&
                    !ed->parent->isTemplateMixin())
                    error(loc, "%s is private", ed->toPrettyChars());

                TemplateDeclaration *td = s->isTemplateDeclaration();
                if (td && td->protection == PROTprivate &&
                    !td->parent->isTemplateMixin())
                    error(loc, "%s is private", td->toPrettyChars());
            }
        }
    }
    return s;
}