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clarify what "not valid" means

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Andrew Kelley 2020-04-11 16:43:19 -04:00 committed by GitHub
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doc/langref.html.in
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@ -8167,7 +8167,7 @@ test "vector @splat" {
{#header_open|@tagName#}
<pre>{#syntax#}@tagName(value: var) []const u8{#endsyntax#}</pre>
<p>
Converts an enum value or union value to a slice of bytes representing the name. Not valid for unamed fields in non-exhaustive enums.
Converts an enum value or union value to a slice of bytes representing the name.</p><p>If the enum is non-exhaustive and the tag value does not map to a name, it invokes safety-checked {#link|Undefined Behavior#}.
</p>
{#header_close#}