PHPCompiler\Backend\PHP7\PHP::compileExpr PHP Метод

    protected function compileExpr(Op\Expr $op, $indent)
    {
        $phi = '';
        $result = '';
        switch ($op->getType()) {
            case 'Expr_ArrayDimFetch':
                $result = $this->getVarName($op->var) . "[" . $this->getVarName($op->dim) . "]";
                break;
            case 'Expr_Assign':
                $result = $this->getVarName($op->var) . ' = ' . $this->getVarName($op->expr);
                foreach ($op->var->usages as $usage) {
                    if ($usage instanceof Op\Phi) {
                        $phi .= $indent . $this->getVarName($usage->result) . " = " . $this->getVarName($op->var) . ";\n";
                    }
                }
                break;
            case 'Expr_BinaryOp_BitwiseAnd':
                $result = $this->getVarName($op->left) . " & " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_BitwiseOr':
                $result = $this->getVarName($op->left) . " | " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_BitwiseXor':
                $result = $this->getVarName($op->left) . " ^ " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Coalesce':
                $result = $this->getVarName($op->left) . " ?? " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Concat':
                $result = $this->getVarName($op->left) . " . " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Div':
                $result = $this->getVarName($op->left) . " / " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Equal':
                $result = $this->getVarName($op->left) . " == " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Greater':
                $result = $this->getVarName($op->left) . " > " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_GreaterOrEqual':
                $result = $this->getVarName($op->left) . " >= " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Identical':
                $result = $this->getVarName($op->left) . " === " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_LogicalXor':
                $result = $this->getVarName($op->left) . " XOR " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Minus':
                $result = $this->getVarName($op->left) . " - " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Mod':
                $result = $this->getVarName($op->left) . " % " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Mul':
                $result = $this->getVarName($op->left) . " * " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_NotEqual':
                $result = $this->getVarName($op->left) . " != " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_NotIdentical':
                $result = $this->getVarName($op->left) . " !== " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Plus':
                $result = $this->getVarName($op->left) . " + " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Pow':
                $result = $this->getVarName($op->left) . " ** " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_ShiftLeft':
                $result = $this->getVarName($op->left) . " << " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_ShiftRight':
                $result = $this->getVarName($op->left) . " >> " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Smaller':
                $result = $this->getVarName($op->left) . " < " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_SmallerOrEqual':
                $result = $this->getVarName($op->left) . " <= " . $this->getVarName($op->right);
                break;
            case 'Expr_BinaryOp_Spaceship':
                $result = $this->getVarName($op->left) . " <=> " . $this->getVarName($op->right);
                break;
            case 'Expr_Cast_Array':
                $result = "(array) " . $this->getVarName($op->expr);
                break;
            case 'Expr_Cast_Bool':
                $result = "(bool) " . $this->getVarName($op->expr);
                break;
            case 'Expr_Cast_Double':
                $result = "(float) " . $this->getVarName($op->expr);
                break;
            case 'Expr_Cast_Int':
                $result = "(int) " . $this->getVarName($op->expr);
                break;
            case 'Expr_Cast_Object':
                $result = "(object) " . $this->getVarName($op->expr);
                break;
            case 'Expr_Cast_String':
                $result = "(string) " . $this->getVarName($op->expr);
                break;
            case 'Expr_Cast_Unset':
                $result = "(unset) " . $this->getVarName($op->expr);
                break;
            default:
                throw new \RuntimeException("Unknown expression found: " . $op->getType());
        }
        foreach ($op->result->usages as $usage) {
            if ($usage instanceof Op\Phi) {
                $phi .= $indent . $this->getVarName($usage->result) . " = " . $this->getVarName($op->result) . ";\n";
            }
        }
        if (count($op->result->usages) === 0) {
            return $indent . $result . ";\n" . $phi;
        }
        return $indent . $this->getVarName($op->result) . " = " . $result . ";\n" . $phi;
    }