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return string_views from forceString*

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once a string has been forced we already have dynamic storage allocated for it,
so we can easily reuse that storage instead of copying.
This commit is contained in:
pennae 2022-01-21 14:44:00 +01:00
parent 0d7fae6a57
commit 41d70a2fc8
19 changed files with 94 additions and 87 deletions
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src/libstore/derivations.hh
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@ -236,7 +236,7 @@ void writeDerivation(Sink & out, const Store & store, const BasicDerivation & dr
It is used as a placeholder to allow derivations to refer to their
own outputs without needing to use the hash of a derivation in
itself, making the hash near-impossible to calculate. */
std::string hashPlaceholder(const std::string & outputName);
std::string hashPlaceholder(const std::string_view outputName);
/* This creates an opaque and almost certainly unique string
deterministically from a derivation path and output name.