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clarify non-scalar indexed assignment #39788

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Feb 25, 2021
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clarify non-scalar indexed assignment #39788

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db3c5c8
clarify non-scalar indexed assignment
mbauman Feb 22, 2021
8bdf110
Update arrays.md
mbauman Feb 22, 2021
18c34b1
fixup error message too
BioTurboNick Feb 22, 2021
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2 changes: 1 addition & 1 deletion base/indices.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -259,7 +259,7 @@ function setindex_shape_check(X::AbstractArray{<:Any,2}, i::Integer, j::Integer)
end

setindex_shape_check(::Any...) =
throw(ArgumentError("indexed assignment with a single value to many locations is not supported; perhaps use broadcasting `.=` instead?"))
throw(ArgumentError("indexed assignment with a single value to possibly many locations is not supported; perhaps use broadcasting `.=` instead?"))

# convert to a supported index type (array or Int)
"""
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2 changes: 1 addition & 1 deletion doc/src/manual/arrays.md
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Expand Up @@ -470,7 +470,7 @@ overwritten with the value of `X`, [`convert`](@ref)ing to the
[`eltype`](@ref) of `A` if necessary.


If any index `I_k` selects more than one location, then the right hand side `X` must be an
If any index `I_k` is itself an array, then the right hand side `X` must also be an
array with the same shape as the result of indexing `A[I_1, I_2, ..., I_n]` or a vector with
the same number of elements. The value in location `I_1[i_1], I_2[i_2], ..., I_n[i_n]` of
`A` is overwritten with the value `X[I_1, I_2, ..., I_n]`, converting if necessary. The
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