go-cql

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log"

	"github.com/gofhir/cql"
)

func main() {
	engine := cql.NewEngine(
		cql.WithTimeout(30 * time.Second),
	)

	cqlSource := `
		library Example version '1.0'
		using FHIR version '4.0.1'
		context Patient
		define IsAdult: AgeInYears() >= 18
	`

	patient := json.RawMessage(`{"resourceType": "Patient", "birthDate": "1990-01-01"}`)

	results, err := engine.EvaluateLibrary(context.Background(), cqlSource, patient, nil)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println("IsAdult:", results["IsAdult"])
}

// Create engine with options
engine := cql.NewEngine(
    cql.WithDataProvider(dp),
    cql.WithTerminologyProvider(tp),
    cql.WithTimeout(30 * time.Second),
    cql.WithMaxDepth(100),
)

// Evaluate all definitions in a CQL library
results, err := engine.EvaluateLibrary(ctx, cqlSource, resource, params)

// Evaluate a single named expression
value, err := engine.EvaluateExpression(ctx, cqlSource, "ExpressionName", resource, params)

// Validate CQL syntax without evaluation
err := engine.Compile(cqlSource)