如何使用准引号来获取值的类型?
How does one use quasiquotes to obtain the type of a value?
我正在尝试编写以下内容:
val value: Int = 3
val tpe = typeOf(value) // This is pseudocode. What should
// actually go on this line?
q"""
type U = $tpe
val v: U = $value
"""
本质上,我需要捕获tpe
中value
(Int
)的类型,并赋值给U
。如何做到这一点?
尝试
import scala.reflect.runtime.universe._
def getType[A: TypeTag](a: A): Type = typeOf[A]
val value: Int = 3
val tpe = getType(value) // Int
相关问题:
我正在尝试编写以下内容:
val value: Int = 3
val tpe = typeOf(value) // This is pseudocode. What should
// actually go on this line?
q"""
type U = $tpe
val v: U = $value
"""
本质上,我需要捕获tpe
中value
(Int
)的类型,并赋值给U
。如何做到这一点?
尝试
import scala.reflect.runtime.universe._
def getType[A: TypeTag](a: A): Type = typeOf[A]
val value: Int = 3
val tpe = getType(value) // Int
相关问题: