问题
I need to read the fields of a case class and do different things depending on the field's type.
I thought I'd try with a macro, reading the ValDefs and pattern matching on the TypeTree of each, but that doesn't reveal what each TypeTree represents (e.g. Ints and Strings both appear as TypeTrees).
Is there an alternative to calling typeTree.toString and matching on the values of the Strings (e.g. "String" or "Int")?
回答1:
You can use TypeTree's tpe method to see the underlying type.
来源：https://stackoverflow.com/questions/23671379/proper-way-to-pattern-match-the-value-of-a-typetree-from-a-valdef-in-scala-macro