Some clean up of contexts

src/context_implementations.jl

@@ -77,44 +77,6 @@
     return tilde_assume(rng, childcontext(context), args...)
 end
 
-function tilde_assume(context::PriorContext{<:NamedTuple}, right, vn, vi)
-    if haskey(context.vars, getsym(vn))
-        vi = setindex!!(vi, tovec(get(context.vars, vn)), vn)
-        settrans!!(vi, false, vn)
-    end
-    return tilde_assume(PriorContext(), right, vn, vi)
-end
-function tilde_assume(
-    rng::Random.AbstractRNG, context::PriorContext{<:NamedTuple}, sampler, right, vn, vi
-)
-    if haskey(context.vars, getsym(vn))
-        vi = setindex!!(vi, tovec(get(context.vars, vn)), vn)
-        settrans!!(vi, false, vn)
-    end
-    return tilde_assume(rng, PriorContext(), sampler, right, vn, vi)
-end
-
-function tilde_assume(context::LikelihoodContext{<:NamedTuple}, right, vn, vi)
-    if haskey(context.vars, getsym(vn))
-        vi = setindex!!(vi, tovec(get(context.vars, vn)), vn)
-        settrans!!(vi, false, vn)
-    end
-    return tilde_assume(LikelihoodContext(), right, vn, vi)
-end
-function tilde_assume(
-    rng::Random.AbstractRNG,
-    context::LikelihoodContext{<:NamedTuple},
-    sampler,
-    right,
-    vn,
-    vi,
-)
-    if haskey(context.vars, getsym(vn))
-        vi = setindex!!(vi, tovec(get(context.vars, vn)), vn)
-        settrans!!(vi, false, vn)
-    end
-    return tilde_assume(rng, LikelihoodContext(), sampler, right, vn, vi)
-end
 function tilde_assume(::LikelihoodContext, right, vn, vi)
     return assume(NoDist(right), vn, vi)
 end
@@ -328,37 +290,6 @@
 end
 
 # `LikelihoodContext`
-function dot_tilde_assume(context::LikelihoodContext{<:NamedTuple}, right, left, vn, vi)
-    return if haskey(context.vars, getsym(vn))
-        var = get(context.vars, vn)
-        _right, _left, _vns = unwrap_right_left_vns(right, var, vn)
-        set_val!(vi, _vns, _right, _left)
-        settrans!!.((vi,), false, _vns)
-        dot_tilde_assume(LikelihoodContext(), _right, _left, _vns, vi)
-    else
-        dot_tilde_assume(LikelihoodContext(), right, left, vn, vi)
-    end
-end
-function dot_tilde_assume(
-    rng::Random.AbstractRNG,
-    context::LikelihoodContext{<:NamedTuple},
-    sampler,
-    right,
-    left,
-    vn,
-    vi,
-)
-    return if haskey(context.vars, getsym(vn))
-        var = get(context.vars, vn)
-        _right, _left, _vns = unwrap_right_left_vns(right, var, vn)
-        set_val!(vi, _vns, _right, _left)
-        settrans!!.((vi,), false, _vns)
-        dot_tilde_assume(rng, LikelihoodContext(), sampler, _right, _left, _vns, vi)
-    else
-        dot_tilde_assume(rng, LikelihoodContext(), sampler, right, left, vn, vi)
-    end
-end
-
 function dot_tilde_assume(context::LikelihoodContext, right, left, vn, vi)
     return dot_assume(nodist(right), left, vn, vi)
 end
@@ -368,46 +299,14 @@
     return dot_assume(rng, sampler, nodist(right), vn, left, vi)
 end
 
-# `PriorContext`
-function dot_tilde_assume(context::PriorContext{<:NamedTuple}, right, left, vn, vi)
-    return if haskey(context.vars, getsym(vn))
-        var = get(context.vars, vn)
-        _right, _left, _vns = unwrap_right_left_vns(right, var, vn)
-        set_val!(vi, _vns, _right, _left)
-        settrans!!.((vi,), false, _vns)
-        dot_tilde_assume(PriorContext(), _right, _left, _vns, vi)
-    else
-        dot_tilde_assume(PriorContext(), right, left, vn, vi)
-    end
-end
-function dot_tilde_assume(
-    rng::Random.AbstractRNG,
-    context::PriorContext{<:NamedTuple},
-    sampler,
-    right,
-    left,
-    vn,
-    vi,
-)
-    return if haskey(context.vars, getsym(vn))
-        var = get(context.vars, vn)
-        _right, _left, _vns = unwrap_right_left_vns(right, var, vn)
-        set_val!(vi, _vns, _right, _left)
-        settrans!!.((vi,), false, _vns)
-        dot_tilde_assume(rng, PriorContext(), sampler, _right, _left, _vns, vi)
-    else
-        dot_tilde_assume(rng, PriorContext(), sampler, right, left, vn, vi)
-    end
-end
-
 # `PrefixContext`
 function dot_tilde_assume(context::PrefixContext, right, left, vn, vi)
-    return dot_tilde_assume(context.context, right, prefix.(Ref(context), vn), vi)
+    return dot_tilde_assume(context.context, right, left, prefix.(Ref(context), vn), vi)
 end
 
 function dot_tilde_assume(rng, context::PrefixContext, sampler, right, left, vn, vi)
     return dot_tilde_assume(
-        rng, context.context, sampler, right, prefix.(Ref(context), vn), vi
+        rng, context.context, sampler, right, left, prefix.(Ref(context), vn), vi
     )
 end
 

src/contexts.jl

@@ -53,7 +53,7 @@ DefaultContext()
 julia> ctx_prior = DynamicPPL.setchildcontext(ctx, PriorContext()); # only compute the logprior
 
 julia> DynamicPPL.childcontext(ctx_prior)
-PriorContext{Nothing}(nothing)
+PriorContext()
 ```
 """
 setchildcontext
@@ -97,7 +97,7 @@ ParentContext(ParentContext(DefaultContext()))
 
 julia> # Replace the leaf context with another leaf.
        leafcontext(setleafcontext(ctx, PriorContext()))
-PriorContext{Nothing}(nothing)
+PriorContext()
 
 julia> # Append another parent context.
        setleafcontext(ctx, ParentContext(DefaultContext()))
@@ -195,32 +195,19 @@ struct DefaultContext <: AbstractContext end
 NodeTrait(context::DefaultContext) = IsLeaf()
 
 """
-    struct PriorContext{Tvars} <: AbstractContext
-        vars::Tvars
-    end
+    PriorContext <: AbstractContext
 
-The `PriorContext` enables the computation of the log prior of the parameters `vars` when
-running the model.
+A leaf context resulting in the exclusion of likelihood terms when running the model.
 """
-struct PriorContext{Tvars} <: AbstractContext
-    vars::Tvars
-end
-PriorContext() = PriorContext(nothing)
+struct PriorContext <: AbstractContext end
 NodeTrait(context::PriorContext) = IsLeaf()
 
 """
-    struct LikelihoodContext{Tvars} <: AbstractContext
-        vars::Tvars
-    end
+    LikelihoodContext <: AbstractContext
 
-The `LikelihoodContext` enables the computation of the log likelihood of the parameters when
-running the model. `vars` can be used to evaluate the log likelihood for specific values
-of the model's parameters. If `vars` is `nothing`, the parameter values inside the `VarInfo` will be used by default.
+A leaf context resulting in the exclusion of prior terms when running the model.
 """
-struct LikelihoodContext{Tvars} <: AbstractContext
-    vars::Tvars
-end
-LikelihoodContext() = LikelihoodContext(nothing)
+struct LikelihoodContext <: AbstractContext end
 NodeTrait(context::LikelihoodContext) = IsLeaf()
 
 """