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RFC: Deprecate findfirst on I/O buffers #26600

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merged 1 commit into from
Mar 26, 2018
Merged

RFC: Deprecate findfirst on I/O buffers #26600

merged 1 commit into from
Mar 26, 2018

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nalimilan
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These two methods are exceptions in the API as we generally do not support find* for non-indexable collections. occursin and readuntil are replacements for most typical cases (but not all).

Possible counter-arguments to this change:

  • IOBuffer is special since even if it's not indexable, it supports position: it could make sense to look for the position of delim
  • the deprecation does not cover the case where you really want to know the position of delim

These two methods are exceptions in the API as we generally do not support find* for non-indexable collections.
occursin and readuntil are replacements for most typical cases (but not all).
@nalimilan nalimilan added domain:io Involving the I/O subsystem: libuv, read, write, etc. domain:search & find The find* family of functions kind:deprecation This change introduces or involves a deprecation labels Mar 23, 2018
@@ -1565,6 +1562,14 @@ end
@deprecate ucfirst uppercasefirst
@deprecate lcfirst lowercasefirst

function search(buf::IOBuffer, delim::UInt8)
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This should be for GenericIOBuffer.

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...with the more generic implementation of course. Otherwise it seems we're missing a deprecation for search(::GenericIOBuffer, ...

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GenericIOBuffer isn't exported, so is it really worth having a deprecation?

@JeffBezanson
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Another problem with these findfirst methods is that they didn't check whether the buffer is seekable; yet another reason to make this change.

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