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fixes #18550 (#18553)

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* fixes #18550

* update the manual to reflect reality
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Andreas Rumpf 2021-07-21 16:55:50 +02:00 • committed by GitHub
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7
doc/manual.rst
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@ -1380,10 +1380,9 @@ variadic proc, it is implicitly converted to `cstring` too:
Even though the conversion is implicit, it is not *safe*: The garbage collector
does not consider a `cstring` to be a root and may collect the underlying
memory. However, in practice, this almost never happens as the GC considers
stack roots conservatively. One can use the builtin procs `GC_ref` and
`GC_unref` to keep the string data alive for the rare cases where it does
not work.
memory. For this reason, the implicit conversion will be removed in future
releases of the Nim compiler. Certain idioms like conversion of a `const` string
to `cstring` are safe and will remain to be allowed.
A `$` proc is defined for cstrings that returns a string. Thus to get a nim
string from a cstring: