scala如何支持这种sbtDSL语法？
我正在查看sbt 手册，我看到您可以设置项目并从 val 的名称推断位置。
lazy val util = (project in file("util"))
相当于
lazy val util = project
这怎么可能？
回答
该宏
/**
* Creates a new Project. This is a macro that expects to be assigned directly to a val.
* The name of the val is used as the project ID and the name of the base directory of the project.
*/
def project: Project = macro Project.projectMacroImpl
扩大
lazy val util = project
到
Project.apply("util", new File("util"))
查看 sbt 宏扩展以创建project/build.sbt文件的内容
scalacOptions ++= Seq("-Ymacro-debug-lite")