C++ AstVar::isIfaceParent方法代码示例

    virtual void visit(AstCell* nodep, AstNUser*) {
	// Cell: Resolve its filename.  If necessary, parse it.
	if (nodep->user1SetOnce()) return;  // AstBind and AstNodeModule may call a cell twice
	if (!nodep->modp()) {
	    UINFO(4,"Link Cell: "<<nodep<<endl);
	    // Use findIdFallback instead of findIdFlat; it doesn't matter for now
	    // but we might support modules-under-modules someday.
	    AstNodeModule* modp = resolveModule(nodep,nodep->modName());
	    if (modp) {
		nodep->modp(modp);
		// Track module depths, so can sort list from parent down to children
		new V3GraphEdge(&m_graph, vertex(m_modp), vertex(modp), 1, false);
	    }
	}
	// Remove AstCell(AstPin("",NULL)), it's a side effect of how we parse "()"
	// the empty middle is identical to the empty rule that must find pins in "(,)".
	if (nodep->pinsp() && !nodep->pinsp()->nextp()
	    && nodep->pinsp()->name() == ""
	    && !nodep->pinsp()->exprp()) {
	    pushDeletep(nodep->pinsp()->unlinkFrBackWithNext());
	}
	if (nodep->paramsp() && !nodep->paramsp()->nextp()
	    && nodep->paramsp()->name() == ""
	    && !nodep->paramsp()->exprp()) {
	    pushDeletep(nodep->paramsp()->unlinkFrBackWithNext());
	}
	// Convert .* to list of pins
	bool pinStar = false;
	for (AstPin* nextp, *pinp = nodep->pinsp(); pinp; pinp=nextp) {
	    nextp = pinp->nextp()->castPin();
	    if (pinp->dotStar()) {
		if (pinStar) pinp->v3error("Duplicate .* in a cell");
		pinStar = true;
		// Done with this fake pin
		pinp->unlinkFrBack()->deleteTree(); pinp=NULL;
	    }
	}
	// Convert unnamed pins to pin number based assignments
	for (AstPin* pinp = nodep->pinsp(); pinp; pinp=pinp->nextp()->castPin()) {
	    if (pinp->name()=="") pinp->name("__pinNumber"+cvtToStr(pinp->pinNum()));
	}
	for (AstPin* pinp = nodep->paramsp(); pinp; pinp=pinp->nextp()->castPin()) {
	    if (pinp->name()=="") pinp->name("__paramNumber"+cvtToStr(pinp->pinNum()));
	}
	if (nodep->modp()) {
	    // Note what pins exist
	    set<string> ports;	// Symbol table of all connected port names
	    for (AstPin* pinp = nodep->pinsp(); pinp; pinp=pinp->nextp()->castPin()) {
		if (pinp->name()=="") pinp->v3error("Connect by position is illegal in .* connected cells");
		if (!pinp->exprp()) pinp->v3warn(PINNOCONNECT,"Cell pin is not connected: "<<pinp->prettyName());
		if (ports.find(pinp->name()) == ports.end()) {
		    ports.insert(pinp->name());
		}
	    }
	    // We search ports, rather than in/out declarations as they aren't resolved yet,
	    // and it's easier to do it now than in V3LinkDot when we'd need to repeat steps.
	    for (AstNode* portnodep = nodep->modp()->stmtsp(); portnodep; portnodep=portnodep->nextp()) {
		if (AstPort* portp = portnodep->castPort()) {
		    if (ports.find(portp->name()) == ports.end()
			&& ports.find("__pinNumber"+cvtToStr(portp->pinNum())) == ports.end()) {
			if (pinStar) {
			    UINFO(9,"    need .* PORT  "<<portp<<endl);
			    // Create any not already connected
			    AstPin* newp = new AstPin(nodep->fileline(),0,portp->name(),
						      new AstVarRef(nodep->fileline(),portp->name(),false));
			    newp->svImplicit(true);
			    nodep->addPinsp(newp);
			} else {  // warn on the CELL that needs it, not the port
			    nodep->v3warn(PINMISSING, "Cell has missing pin: "<<portp->prettyName());
			    AstPin* newp = new AstPin(nodep->fileline(),0,portp->name(),NULL);
			    nodep->addPinsp(newp);
			}
		    }
		}
	    }
	}
	if (nodep->modp()->castIface()) {
	    // Cell really is the parent's instantiation of an interface, not a normal module
	    // Make sure we have a variable to refer to this cell, so can <ifacename>.<innermember>
	    // in the same way that a child does.  Rename though to avoid conflict with cell.
	    // This is quite similar to how classes work; when unpacked classes are better supported
	    // may remap interfaces to be more like a class.
	    if (!nodep->hasIfaceVar()) {
		string varName = nodep->name()+"__Viftop";  // V3LinkDot looks for this naming
		AstIfaceRefDType* idtypep = new AstIfaceRefDType(nodep->fileline(), nodep->name(), nodep->modp()->name());
		idtypep->cellp(nodep);  // Only set when real parent cell known
		idtypep->ifacep(NULL);  // cellp overrides
		AstVar* varp = new AstVar(nodep->fileline(), AstVarType::IFACEREF, varName, VFlagChildDType(), idtypep);
		varp->isIfaceParent(true);
		nodep->addNextHere(varp);
		nodep->hasIfaceVar(true);
	    }
	}
	if (nodep->modp()) {
	    nodep->iterateChildren(*this);
	}
	UINFO(4," Link Cell done: "<<nodep<<endl);
    }