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[ub] small fixes to examples #7890

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merged 2 commits into from
May 28, 2025
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[ub] small fixes to examples #7890

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7bf091d
[ub] small fixes to examples
notadragon May 23, 2025
a0b47c4
fixup: herb suggestion for variable name
notadragon May 24, 2025
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20 changes: 9 additions & 11 deletions source/ub.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -790,23 +790,20 @@

\pnum
\begin{example}
If \tcode{float} does not adhere to \IsoFloatUndated{}
and cannot represent positive infinty,
a sufficiently large \tcode{double} value will be
outside the (finite) range of \tcode{float}.
\begin{codeblock}
void f() {
double d = FLT_MAX * 16;
double d = FLT_MAX;
d *= 16;
float f = static_cast<float>(d); // undefined behavior.
}
\end{codeblock}
\end{example}


\pnum
\begin{example}
\begin{codeblock}

\end{codeblock}
\end{example}

\pnum
\ubxref{expr.static.cast.downcast.wrong.derived.type} \\
Down-casting to the wrong derived type is undefined behavior.
Expand Down Expand Up @@ -1347,7 +1344,8 @@
\begin{codeblock}
extern int &ir1;
int i2 = ir1; // undefined behavior, \tcode{ir1} not yet initialized
int ir1 = 17;
int i3 = 17;
int &ir1 = i3;
\end{codeblock}
\end{example}

Expand Down Expand Up @@ -1674,9 +1672,9 @@
}
void f()
{
X& px = &g();
X* px = &g();
px->~X();
int*p = px->i; // undefined behavior
int p = px->i; // undefined behavior
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Minor: Maybe change this to int j since the name p might connote a pointer.

}
\end{codeblock}
\end{example}
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