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Add basetype to strip type parameters from type #46213

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Add basetype to strip type parameters from type #46213

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17 changes: 17 additions & 0 deletions base/essentials.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -402,6 +402,23 @@ function typename(a::Union)
end
typename(union::UnionAll) = typename(union.body)

"""
basetype(x::Type)
Strips the type parameter from given type x.
# Examples
```jldoctest
julia> basetype(Array{Int64, 3})
Array

julia> basetype(Vector{Vector{ComplexF32}})
Array

julia> basetype(Int)
Int64
```
"""
basetype(::Type{T}) where T = T.name.wrapper

_tuple_error(T::Type, x) = (@noinline; throw(MethodError(convert, (T, x))))

convert(::Type{T}, x::T) where {T<:Tuple} = x
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