I wrote a func:

func replace_val_with_js_eval(prompt string, js_vm *otto.Otto) string {
	re := regexp.MustCompile(`\$\{([^\}]+)\}`)
	// 使用FindAllStringSubmatch查找所有匹配项
	matches1 := re.FindAllStringSubmatch(prompt, -1)
	// 遍历匹配结果，提取变量名
	for _, match := range matches1 {
		if len(match) > 1 {
			//fmt.Println("找到变量:", match[1])
			result, err := js_vm.Run(match[1])
			if err == nil {
				if result.IsUndefined() {
					continue
				}
				if result.IsString() {
					val_s, _ := result.ToString()
					prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", val_s)
				} else if result.IsNumber() {
					val_n, _ := result.ToFloat()
					prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", g.Ftos(val_n))
				} else if result.IsBoolean() {
					val_b, _ := result.ToBoolean()
					if val_b {
						prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", "true")
					} else {
						prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", "false")
					}
				} else if result.IsNull() {
					prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", "null")
				} else if result.IsNaN() {
					prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", "NaN")
				} else if result.IsObject() {
					json, err := result.MarshalJSON()
					if err == nil {
						prompt = s.ReplaceAll(prompt, "${"+match[1]+"}", string(json))
					}

				}
			}
		}
	}
	return prompt
}

There is no adaptation for a=${test} #521

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There is no adaptation for a=`${test}` #521