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Add missing default for vector types #1464

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May 6, 2022
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Add missing default for vector types #1464

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3 changes: 2 additions & 1 deletion document/core/exec/runtime.rst
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Expand Up @@ -51,11 +51,12 @@ or *external references* pointing to an uninterpreted form of :ref:`extern addre
.. _default-val:

Each :ref:`value type <syntax-valtype>` has an associated *default value*;
it is the respective value :math:`0` for :ref:`number types <syntax-numtype>` and null for :ref:`reference types <syntax-reftype>`.
it is the respective value :math:`0` for :ref:`number types <syntax-numtype>`, :math:`0` for :ref:`vector types <syntax-vectype>`, and null for :ref:`reference types <syntax-reftype>`.

.. math::
\begin{array}{lcl@{\qquad}l}
\default_t &=& t{.}\CONST~0 & (\iff t = \numtype) \\
\default_t &=& t{.}\CONST~0 & (\iff t = \vectype) \\
\default_t &=& \REFNULL~t & (\iff t = \reftype) \\
\end{array}

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