Specialised substring equality for annotated strs #54302
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tecosaur
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The fact that only a string without annotations is equal to a non-annotated string (in order to preserve the transitivity of equality), makes the generic fallback methods for string comparison insufficient. As such, ==(::AnnoatedString, ::AbstractString) is implemented in annotated.jl, but this issue re-appears when dealing with substrings. The obvious solution is to just implement a specialised method for substrings. This does seem potentially a bit whack-a-mole, but I'm worried that cleverer solutions might come with subtle issues of their own. For now, let's try the simple and obvious solution, and improve it later if we can work out a nicer way of handling this issue in general.
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This was referenced Apr 30, 2024
fingolfin
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May 2, 2024
KristofferC
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May 6, 2024
The least-bad idea I've had so far for fixing #53042. I figure this fixes the bug raised there, and we can always switch to a clearly-better solution if one appears. The fact that only a string without annotations is equal to a non-annotated string (in order to preserve the transitivity of equality), makes the generic fallback methods for string comparison insufficient. As such, ==(::AnnoatedString, ::AbstractString) is implemented in annotated.jl, but this issue re-appears when dealing with substrings. The obvious solution is to just implement a specialised method for substrings. This does seem potentially a bit whack-a-mole, but I'm worried that cleverer solutions might come with subtle issues of their own. For now, let's try the simple and obvious solution, and improve it later if we can work out a nicer way of handling this issue in general. (cherry picked from commit 185f058)
KristofferC
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Backported PRs: - [x] #53665 <!-- use afoldl instead of tail recursion for tuples --> - [x] #53976 <!-- LinearAlgebra: LazyString in interpolated error messages --> - [x] #54005 <!-- make `view(::Memory, ::Colon)` produce a Vector --> - [x] #54010 <!-- Overload `Base.literal_pow` for `AbstractQ` --> - [x] #54069 <!-- Allow PrecompileTools to see MI's inferred by foreign abstract interpreters --> - [x] #53750 <!-- inference correctness: fields and globals can revert to undef --> - [x] #53984 <!-- Profile: fix heap snapshot is valid char check --> - [x] #54102 <!-- Explicitly compute stride in unaliascopy for SubArray --> - [x] #54070 <!-- Fix integer overflow in `skip(s::IOBuffer, typemax(Int64))` --> - [x] #54013 <!-- Support case-changes to Annotated{String,Char}s --> - [x] #53941 <!-- Fix writing of AnnotatedChars to AnnotatedIOBuffer --> - [x] #54137 <!-- Fix typo in docs for `partialsortperm` --> - [x] #54129 <!-- use correct size when creating output data from an IOBuffer --> - [x] #54153 <!-- Fixup IdSet docstring --> - [x] #54143 <!-- Fix `make install` from tarballs --> - [x] #54151 <!-- LinearAlgebra: Correct zero element in `_generic_matvecmul!` for block adj/trans --> - [x] #54213 <!-- Add `public` statement to `Base.GC` --> - [x] #54222 <!-- Utilize correct tbaa when emitting stores of unions. --> - [x] #54233 <!-- set MAX_OS_WRITE on unix --> - [x] #54255 <!-- fix `_checked_mul_dims` in the presence of 0s and overflow. --> - [x] #54259 <!-- Fix typo in `readuntil` --> - [x] #54251 <!-- fix typo in gc_mark_memory8 when chunking a large array --> - [x] #54276 <!-- Fix solve for complex `Hermitian` with non-vanishing imaginary part on diagonal --> - [x] #54248 <!-- ensure package callbacks are invoked when no valid precompile file exists for an "auto loaded" stdlib --> - [x] #54308 <!-- Implement eval-able AnnotatedString 2-arg show --> - [x] #54302 <!-- Specialised substring equality for annotated strs --> - [x] #54243 <!-- prevent `package_callbacks` to run multiple time for a single package --> - [x] #54350 <!-- add a precompile signature to Artifacts code that is used by JLLs --> - [x] #54331 <!-- correctly track freed bytes in jl_genericmemory_to_string --> - [x] #53509 <!-- revert moving "creating packages" from Pkg.jl --> - [x] #54335 <!-- When accessing the data pointer for an array, first decay it to a Derived Pointer --> - [x] #54239 <!-- Make sure `fieldcount` constant-folds for `Tuple{...}` --> - [x] #54288 - [x] #54067 - [x] #53715 <!-- Add read/write specialisation for IOContext{AnnIO} --> - [x] #54289 <!-- Rework annotation ordering/optimisations --> - [x] #53815 <!-- create phantom task for GC threads --> - [x] #54130 <!-- inference: handle `LimitedAccuracy` in `handle_global_assignment!` --> - [x] #54428 <!-- Move ConsoleLogging.jl into Base --> - [x] #54332 <!-- Revert "add unsetindex support to more copyto methods (#51760)" --> - [x] #53826 <!-- Make all command-line options documented in all related files --> - [x] #54465 <!-- typeintersect: conservative typevar subtitution during `finish_unionall` --> - [x] #54514 <!-- typeintersect: followup cleanup for the nothrow path of type instantiation --> - [x] #54499 <!-- make `@doc x` work without REPL loaded --> - [x] #54210 <!-- attach finalizer in `mmap` to the correct object --> - [x] #54359 <!-- Pkg REPL: cache `pkg_mode` lookup --> Non-merged PRs with backport label: - [ ] #54471 <!-- Actually setup jit targets when compiling packageimages instead of targeting only one --> - [ ] #54457 <!-- Make `String(::Memory)` copy --> - [ ] #54323 <!-- inference: fix too conservative effects for recursive cycles --> - [ ] #54322 <!-- effects: add new `@consistent_overlay` macro --> - [ ] #54191 <!-- make `AbstractPipe` public --> - [ ] #53957 <!-- tweak how filtering is done for what packages should be precompiled --> - [ ] #53882 <!-- Warn about cycles in extension precompilation --> - [ ] #53707 <!-- Make ScopedValue public --> - [ ] #53452 <!-- RFC: allow Tuple{Union{}}, returning Union{} --> - [ ] #53402 <!-- Add `jl_getaffinity` and `jl_setaffinity` --> - [ ] #53286 <!-- Raise an error when using `include_dependency` with non-existent file or directory --> - [ ] #52694 <!-- Reinstate similar for AbstractQ for backward compatibility --> - [ ] #51479 <!-- prevent code loading from lookin in the versioned environment when building Julia -->
KristofferC
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lazarusA
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Jul 12, 2024
The least-bad idea I've had so far for fixing JuliaLang#53042. I figure this fixes the bug raised there, and we can always switch to a clearly-better solution if one appears. The fact that only a string without annotations is equal to a non-annotated string (in order to preserve the transitivity of equality), makes the generic fallback methods for string comparison insufficient. As such, ==(::AnnoatedString, ::AbstractString) is implemented in annotated.jl, but this issue re-appears when dealing with substrings. The obvious solution is to just implement a specialised method for substrings. This does seem potentially a bit whack-a-mole, but I'm worried that cleverer solutions might come with subtle issues of their own. For now, let's try the simple and obvious solution, and improve it later if we can work out a nicer way of handling this issue in general.
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The least-bad idea I've had so far for fixing #53042.
I figure this fixes the bug raised there, and we can always switch to a clearly-better solution if one appears.
See the commit message for details.