Cost Estimation interface (#14)

See issue #13

Reviewed-on: Rubydragon/MetagraphOptimization.jl#14
Co-authored-by: Anton Reinhard <anton.reinhard@proton.me>
Co-committed-by: Anton Reinhard <anton.reinhard@proton.me>

src/MetagraphOptimization.jl

@@ -5,6 +5,7 @@ A module containing tools to work on DAGs.
 """
 module MetagraphOptimization
 
+# graph types
 export DAG
 export Node
 export Edge
@@ -18,6 +19,7 @@ export FusedComputeTask
 export PossibleOperations
 export GraphProperties
 
+# graph functions
 export make_node
 export make_edge
 export insert_node
@@ -27,10 +29,13 @@ export is_exit_node
 export parents
 export children
 export compute
+export data
+export compute_effort
 export get_properties
 export get_exit_node
 export is_valid, is_scheduled
 
+# graph operation related
 export Operation
 export AppliedOperation
 export NodeFusion
@@ -42,6 +47,10 @@ export can_pop
 export reset_graph!
 export get_operations
 
+# ABC model
+export ParticleValue
+export ParticleA, ParticleB, ParticleC
+export ABCProcessDescription, ABCProcessInput, ABCModel
 export ComputeTaskP
 export ComputeTaskS1
 export ComputeTaskS2
@@ -49,14 +58,17 @@ export ComputeTaskV
 export ComputeTaskU
 export ComputeTaskSum
 
+# code generation related
 export execute
 export parse_dag, parse_process
 export gen_process_input
 export get_compute_function
-export ParticleValue
-export ParticleA, ParticleB, ParticleC
-export ABCProcessDescription, ABCProcessInput, ABCModel
 
+# estimator
+export cost_type, graph_cost, operation_effect
+export GlobalMetricEstimator, CDCost
+
+# machine info
 export Machine
 export get_machine_info
 
@@ -121,6 +133,9 @@ include("task/compute.jl")
 include("task/print.jl")
 include("task/properties.jl")
 
+include("estimator/interface.jl")
+include("estimator/global_metric.jl")
+
 include("models/interface.jl")
 include("models/print.jl")