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add doc and parent namefield to GWord

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kalmar 2017-05-11 17:59:37 +02:00
parent a7c91bf858
commit cf4529dce6
1 changed files with 16 additions and 0 deletions
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src/Groups.jl
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@ -21,11 +21,27 @@ doc"""
"""
abstract GSymbol
doc"""
W::GWord{T<:GSymbol} <:GroupElem
> Basic representation of element of a finitely presented group. `W.symbols`
> fieldname contains particular group symbols which multiplied constitute a
> group element, i.e. a word in generators.
> As reduction (inside group) of such word may be time consuming we provide
> `savedhash` and `modified` fields as well:
> hash (used e.g. in the `unique` function) is calculated by reducing the word,
> setting `modified` flag to `false` and computing the hash which is stored in
> `savedhash` field.
> whenever word `W` is changed `W.modified` is set to `false`;
> Future comparisons don't perform reduction (and use `savedhash`) as long as
> `modified` flag remains `false`.
"""
type GWord{T<:GSymbol} <: GroupElem
symbols::Vector{T}
savedhash::UInt
modified::Bool
parent::Group
function GWord(symbols::Vector{T})
return new(symbols, hash(symbols), true)