PackMathOperandsOp

package main

import (
	"context"
	"encoding/json"
	"log"
	"os"
	"time"

	"github.com/akennis/sparsi-go/library"
	_ "github.com/akennis/dagor/operator/builtin"

	"github.com/panjf2000/ants/v2"
	"github.com/akennis/dagor"
	"github.com/akennis/dagor/graph"
)

func main() {
	a, b := 48.0, 6.0
	library.RegisterConst("dividend", a)
	library.RegisterConst("divisor", b)

	g, err := graph.NewBuilder("pack_demo").
		Vertex("src_a").Op("dividend").Output("Result", "wire_a").
		Vertex("src_b").Op("divisor").Output("Result", "wire_b").
		Vertex("pack").Op("PackMathOperandsOp").
		Input("A", "wire_a").Input("B", "wire_b").
		Output("Result", "operands").
		Vertex("compute").Op("AIComputeMathOperandsToFloat64Op").
		Input("Input", "operands").
		Output("Result", "answer").
		Build()
	if err != nil {
		log.Fatalf("build: %v", err)
	}

	pool, err := ants.NewPool(4)
	if err != nil {
		log.Fatalf("pool: %v", err)
	}
	defer pool.Release()

	eng, err := dagor.NewEngine(g, pool)
	if err != nil {
		log.Fatalf("engine: %v", err)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
	defer cancel()

	if err := eng.Run(ctx); err != nil {
		log.Fatalf("run: %v", err)
	}

	out := map[string]any{"a": a, "b": b}
	if raw, ok := eng.GetOutput("answer"); ok {
		out["result"] = *raw.(*float64)
	}
	enc := json.NewEncoder(os.Stdout)
	enc.SetIndent("", "  ")
	enc.Encode(out)
}