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20 changes: 5 additions & 15 deletions src/sampler.jl
Original file line number Diff line number Diff line change
Expand Up @@ -67,19 +67,6 @@ function AbstractMCMC.step(
return vi, nothing
end

function default_varinfo(rng::Random.AbstractRNG, model::Model, sampler::AbstractSampler)
return default_varinfo(rng, model, sampler, DefaultContext())
end
function default_varinfo(
rng::Random.AbstractRNG,
model::Model,
sampler::AbstractSampler,
context::AbstractContext,
)
init_sampler = initialsampler(sampler)
return VarInfo(rng, model, init_sampler, context)
end

function AbstractMCMC.sample(
rng::Random.AbstractRNG,
model::Model,
Expand All @@ -95,12 +82,15 @@ function AbstractMCMC.sample(
)
end

# initial step: general interface for resuming and
# This function handles the initial step in the AbstractMCMC interface for all
# samplers (except SampleFromUniform and SampleFromPrior). The subsequent steps
# are implemented individually for each sampler as they depend on the sampler
# state.
function AbstractMCMC.step(
rng::Random.AbstractRNG, model::Model, spl::Sampler; initial_params=nothing, kwargs...
)
# Sample initial values.
vi = default_varinfo(rng, model, spl)
vi = VarInfo(rng, model, initialsampler(spl), DefaultContext())

# Update the parameters if provided.
if initial_params !== nothing
Expand Down