Helper utilities

SkipIndexIterator

A special type of iterator that simply iterates over internal iterator, but skips index skip.

Arguments

• iterator: internal iterator
• skip: index to skip (integer)

See also: skipindex

skipindex(iterator, skip)

Creation operator for SkipIndexIterator.

julia> s = ReactiveMP.skipindex(1:3, 2)
2-element ReactiveMP.SkipIndexIterator{Int64, UnitRange{Int64}}:
 1
 3

julia> collect(s)
2-element Vector{Int64}:
 1
 3

See also: SkipIndexIterator

proxy_type(proxy, type)

Returns a type wrapped with a proxy type in a form of ProxyType{ <: Type }.

Arguments

• proxy: Proxy type used to wrap type
• type: Type to be wrapped

ensure_symbol(input)

This function ensures that the given argument has a Symbol type

@proxy_methods(proxy_type, proxy_getter, proxy_methods)

Generates proxy methods for a specified proxy_type using proxy_getter. For example:

@proxy_methods Message getdata [ 
    Distributions.mean, 
    Distributions.var 
]

generates:

Distributions.mean(proxy::Message) = Distributions.mean(getdata(proxy))
Distributions.var(proxy::Message)  = Distributions.mean(getdata(proxy))

upper_type(type)

This function returns Type{ <: T } expression for the following input expressions:

1. typeof(T)
2. Type{ <: T }
3. Type{ T }
4. T

Arguments

• type: Type expression to be extended

bottom_type(type)

This function returns T expression for the following input expressions:

1. typeof(T)
2. Type{ <: T }
3. Type{ T }
4. T

Arguments

• type: Type expression to be lowered