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Implement strided array traits #42

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Implement strided array traits #42

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11 changes: 9 additions & 2 deletions src/basic.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -67,9 +67,16 @@ Base.empty(::Type{<:MemoryView{E, M}}) where {E, M} = unsafe_new_memoryview(M, m
Base.pointer(x::MemoryView{T}) where {T} = Ptr{T}(pointer(x.ref))
Base.unsafe_convert(::Type{Ptr{T}}, v::MemoryView{T}) where {T} = pointer(v)
Base.cconvert(::Type{<:Ptr{T}}, v::MemoryView{T}) where {T} = v.ref
Base.elsize(::Type{<:MemoryView{T}}) where {T} = Base.elsize(Memory{T})
Base.sizeof(x::MemoryView) = Base.elsize(typeof(x)) * length(x)
Base.strides(@nospecialize(::MemoryView)) = (1,)
@static if isdefined(Base, :is_strided)
Base.is_contiguous(::Type{<:MemoryView}) = true
Base.is_ptr_loadable(::Type{<:MemoryView}) = true
Base.is_ptr_storable(::Type{<:MutableMemoryView}) = true
else
# Base fallbacks handle these two methods if is_contiguous = true
Base.elsize(::Type{<:MemoryView{T}}) where {T} = Base.elsize(Memory{T})
Base.strides(@nospecialize(::MemoryView)) = (1,)
end

# For two distinct element types, they can't alias
Base.mightalias(@nospecialize(::MemoryView), @nospecialize(::MemoryView)) = false
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