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<h4 class="subsection">10.10.6 C++ Expressions</h4>
<p>This section describes expressions specific to the C and C++ front
ends.
<dl>
<dt><code>TYPEID_EXPR</code><dd>
Used to represent a <code>typeid</code> expression.
<br><dt><code>NEW_EXPR</code><dt><code>VEC_NEW_EXPR</code><dd>
Used to represent a call to <code>new</code> and <code>new[]</code> respectively.
<br><dt><code>DELETE_EXPR</code><dt><code>VEC_DELETE_EXPR</code><dd>
Used to represent a call to <code>delete</code> and <code>delete[]</code> respectively.
<br><dt><code>MEMBER_REF</code><dd>
Represents a reference to a member of a class.
<br><dt><code>THROW_EXPR</code><dd>
Represents an instance of <code>throw</code> in the program. Operand 0,
which is the expression to throw, may be <code>NULL_TREE</code>.
<br><dt><code>AGGR_INIT_EXPR</code><dd>An <code>AGGR_INIT_EXPR</code> represents the initialization as the return
value of a function call, or as the result of a constructor. An
<code>AGGR_INIT_EXPR</code> will only appear as a full-expression, or as the
second operand of a <code>TARGET_EXPR</code>. <code>AGGR_INIT_EXPR</code>s have
a representation similar to that of <code>CALL_EXPR</code>s. You can use
the <code>AGGR_INIT_EXPR_FN</code> and <code>AGGR_INIT_EXPR_ARG</code> macros to access
the function to call and the arguments to pass.
<p>If <code>AGGR_INIT_VIA_CTOR_P</code> holds of the <code>AGGR_INIT_EXPR</code>, then
the initialization is via a constructor call. The address of the
<code>AGGR_INIT_EXPR_SLOT</code> operand, which is always a <code>VAR_DECL</code>,
is taken, and this value replaces the first argument in the argument
list.
<p>In either case, the expression is void.
</dl>
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