Add basic execution function

src/code_gen/main.jl

@@ -9,7 +9,10 @@ function gen_code(graph::DAG)
 
     for node in get_entry_nodes(graph)
         enqueue!(nodeQueue, node => 1)
-        push!(inputSyms, Symbol("data_$(replace(string(node.id), "-"=>"_"))_in"))
+        push!(
+            inputSyms,
+            Symbol("data_$(replace(string(node.id), "-"=>"_"))_in"),
+        )
     end
 
     node = nothing
@@ -27,6 +30,33 @@ function gen_code(graph::DAG)
 
     # node is now the last node we looked at -> the output node
     outSym = Symbol("data_$(replace(string(node.id), "-"=>"_"))")
-    
-    return (code = Expr(:block, code...), inputSymbols = inputSyms, outputSymbol = outSym)
+
+    return (
+        code = Expr(:block, code...),
+        inputSymbols = inputSyms,
+        outputSymbol = outSym,
+    )
+end
+
+function execute(graph::DAG, input::Vector{Particle})
+    (code, inputSymbols, outputSymbol) = gen_code(graph)
+
+    @assert length(input) == length(inputSymbols)
+
+    assignInputs = Vector{Expr}()
+    for i in 1:length(input)
+        push!(
+            assignInputs,
+            Meta.parse(
+                "$(inputSymbols[i]) = ParticleValue(Particle($(input[i]).P0, $(input[i]).P1, $(input[i]).P2, $(input[i]).P3, $(input[i]).m), 1.0)",
+            ),
+        )
+    end
+
+    assignInputs = Expr(:block, assignInputs...)
+    eval(assignInputs)
+    eval(code)
+
+    eval(Meta.parse("result = $outputSymbol"))
+    return result
 end