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/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools.nsc
package symtab
trait TypeDebugging {
self: SymbolTable =>
import definitions._
// @M toString that is safe during debugging (does not normalize, ...)
object TypeDebugStrings {
object str {
def parentheses(xs: List[_]): String = xs.mkString("(", ", ", ")")
def brackets(xs: List[_]): String = if (xs.isEmpty) "" else xs.mkString("[", ", ", "]")
def tparams(tparams: List[Type]): String = brackets(tparams map debug)
def parents(ps: List[Type]): String = (ps map debug).mkString(" with ")
def refine(defs: Scope): String = defs.toList.mkString("{", " ;\n ", "}")
}
def dump(tp: Type): Unit = {
println("** " + tp + " / " + tp.getClass + " **")
import tp._
println("typeSymbol = " + typeSymbol)
println("termSymbol = " + termSymbol)
println("widen = " + widen)
println("deconst = " + deconst)
println("typeOfThis = " + typeOfThis)
println("bounds = " + bounds)
println("parents = " + parents)
println("prefixChain = " + prefixChain)
println("typeConstructor = " + typeConstructor)
println(" .. typeConstructor.typeParams = " + typeConstructor.typeParams)
println(" .. _.variance = " + (typeConstructor.typeParams map (_.variance)))
println("typeArgs = " + typeArgs)
println("resultType = " + resultType)
println("finalResultType = " + finalResultType)
println("paramss = " + paramss)
println("paramTypes = " + paramTypes)
println("typeParams = " + typeParams)
println("boundSyms = " + boundSyms)
println("baseTypeSeq = " + baseTypeSeq)
println("baseClasses = " + baseClasses)
println("toLongString = " + toLongString)
}
private def debug(tp: Type): String = tp match {
case TypeRef(pre, sym, args) => debug(pre) + "." + sym.nameString + str.tparams(args)
case ThisType(sym) => sym.nameString + ".this"
case SingleType(pre, sym) => debug(pre) +"."+ sym.nameString +".type"
case RefinedType(parents, defs) => str.parents(parents) + str.refine(defs)
case ClassInfoType(parents, defs, clazz) => "class "+ clazz.nameString + str.parents(parents) + str.refine(defs)
case PolyType(tparams, result) => str.brackets(tparams) + " " + debug(result)
case TypeBounds(lo, hi) => ">: "+ debug(lo) +" <: "+ debug(hi)
case tv @ TypeVar(_, _) => tv.toString
case ExistentialType(tparams, qtpe) => "forSome "+ str.brackets(tparams) + " " + debug(qtpe)
case _ => tp.toString
}
def debugString(tp: Type) = debug(tp)
}
private def TDS = TypeDebugStrings
def paramString(tp: Type) = TDS.str parentheses (tp.params map (_.defString))
def typeParamsString(tp: Type) = TDS.str brackets (tp.typeParams map (_.defString))
def typeArgsString(tp: Type) = TDS.str brackets (tp.typeArgs map (_.safeToString))
def debugString(tp: Type) = TDS debugString tp
}
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