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Groups.jl
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optionally coerce to G when called G(a::Vector)

This commit is contained in:
kalmar 2017-07-21 13:25:34 +02:00
parent ae97c20e62
commit ba4400efbb
1 changed files with 9 additions and 9 deletions
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18
src/DirectProducts.jl
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@ -72,16 +72,16 @@ end
(G::DirectProductGroup)(g::DirectProductGroupElem) = G(g.elts)
doc"""
(G::DirectProductGroup)(a::Vector; checked=true)
> Constructs element of the direct product group `G` by coercing each element
> of vector `a` to the corresponding factor of `G`. If `checked` flag is set to
> `false` no checks on the correctness are performed.
(G::DirectProductGroup)(a::Vector, check::Bool=true)
> Constructs element of the $n$-fold direct product group `G` by coercing each
> element of vector `a` to `G.group`. If `check` flag is set to `false` no
> checks on the correctness are performed.
"""
function (G::DirectProductGroup){T<:GroupElem}(a::Vector{T})
length(a) == length(G.factors) || throw("Cannot coerce $a to $G: they have
different number of factors")
@assert elem_type(first(G.factors)) == T
function (G::DirectProductGroup)(a::Vector, check::Bool=true)
if check
G.n == length(a) || throw("Can not coerce to DirectProductGroup: lengths differ")
a = G.group.(a)
end
return DirectProductGroupElem(a)
end