PHPCfg\Parser::parseStmt_Switch PHP Метод

    protected function parseStmt_Switch(Stmt\Switch_ $node)
    {
        if ($this->switchCanUseJumptable($node)) {
            $this->compileJumptableSwitch($node);
            return;
        }
        // Desugar switch into compare-and-jump sequence
        $cond = $this->parseExprNode($node->cond);
        $endBlock = new Block();
        $defaultBlock = $endBlock;
        /** @var Block|null $prevBlock */
        $prevBlock = null;
        foreach ($node->cases as $case) {
            $ifBlock = new Block();
            if ($prevBlock && !$prevBlock->dead) {
                $prevBlock->children[] = new Jump($ifBlock);
                $ifBlock->addParent($prevBlock);
            }
            if ($case->cond) {
                $caseExpr = $this->parseExprNode($case->cond);
                $this->block->children[] = $cmp = new Op\Expr\BinaryOp\Equal($this->readVariable($cond), $this->readVariable($caseExpr), $this->mapAttributes($case));
                $elseBlock = new Block();
                $this->block->children[] = new JumpIf($cmp->result, $ifBlock, $elseBlock);
                $ifBlock->addParent($this->block);
                $elseBlock->addParent($this->block);
                $this->block = $elseBlock;
            } else {
                $defaultBlock = $ifBlock;
            }
            $prevBlock = $this->parseNodes($case->stmts, $ifBlock);
        }
        if ($prevBlock && !$prevBlock->dead) {
            $prevBlock->children[] = new Jump($endBlock);
            $endBlock->addParent($prevBlock);
        }
        $this->block->children[] = new Jump($defaultBlock);
        $defaultBlock->addParent($this->block);
        $this->block = $endBlock;
    }