Fixed expression

Syntax

<?fixed={x}?>

FixedExpression :
<?fixed={ ListExpression^allowIn } ?>

Semantics

Deactivates lookup of dynamic properties (implemented through a meta-method such as meta::get(k) where k includes string or QName) in the enclosed expression.

Note: This is necessary in rare cases where, for example, a dynamic class needs to access internal data. In such cases, instance data are not accessible unless the user uses the fixed expression <?fixed={x}?>. In the case of lexical name resolution with a this receiver, the fixed expression is not necessary as in-scope lookup skips dynamic names.

The fixed name lookup effect is propagated:

• From parenthesized expressions to the inner expression
• From dot operator to base expression
• From brackets operator to base expression