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Remove unnecessary mut
from make_fn_return_ref
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1 changed files with 1 additions and 1 deletions
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@ -740,7 +740,7 @@ fn specify_fn(
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/// Given a function def tagged with `#[return_ref]`, modifies `fn_sig` so that
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/// it returns an `&Value` instead of `Value`. May introduce a name for the
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/// database lifetime if required.
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fn make_fn_return_ref(mut fn_sig: &mut syn::Signature) -> syn::Result<()> {
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fn make_fn_return_ref(fn_sig: &mut syn::Signature) -> syn::Result<()> {
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// An input should be a `&dyn Db`.
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// We need to ensure it has a named lifetime parameter.
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let (db_lifetime, _) = db_lifetime_and_ty(fn_sig)?;
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