, bu desteklenmeyenler. Önek (friends.head
), doğru türü belirlemek için aslında tip denetleyiciden geçmez.
Bununla oynamak isterseniz, Scala'nın en son sürümünü kullanmalı ve neler olduğunu görmek için -Dscala.repl.debug
ile birlikte çalışmalısınız.
scala> ps.head.
complete(ps.head., 8) last = (, -1), verbosity: 0
List[$read$$iw$$iw$Person] completions ==> List(removeDuplicates, toStream, stringPrefix, reverse, span, dropWhile, takeWhile, splitAt, takeRight, slice, drop, take, toList, +:, ++, mapConserve, reverse_:::, :::, ::, companion, lastIndexWhere, indexWhere, segmentLength, isDefinedAt, lengthCompare, sameElements, dropRight, last, reduceRight, reduceLeft, foldRight, foldLeft, find, count, exists, forall, foreach, apply, length, productPrefix, productIterator, seq, corresponds, iterator, toSeq, toString, view, indices, sorted, sortBy, sortWith, padTo, :+, updated, patch, distinct, intersect, diff, union, contains, containsSlice, lastIndexOfSlice, indexOfSlice, endsWith, startsWith, reverseIterator, reverseMap, combinations, permutations, size, lastIndexOf, indexOf, prefixLength, lift, andThen, orElseFast, orElse, compose, canEqual, zipWithIndex, zipAll, zip, copyToArray, sliding, grouped, head, toIterator, toIterable, isEmpty, transpose, flatten, unzip3, unzip, genericBuilder, withFilter, toTraversable, inits, tails, init, lastOption, tail, headOption, scanRight, scanLeft, scan, groupBy, partition, collect, filterNot, filter, flatMap, map, ++:, hasDefiniteSize, repr, isTraversableAgain, par, addString, mkString, toMap, toSet, toBuffer, toIndexedSeq, toArray, copyToBuffer, minBy, maxBy, max, min, product, sum, aggregate, fold, reduceOption, reduce, reduceRightOption, reduceLeftOption, :\, /:, collectFirst, nonEmpty, /:\, asInstanceOf, isInstanceOf, productArity, productElement)
List[$read$$iw$$iw$Person] -> 'head' ==> Some(()Object (31 members))
()Object completions ==> List(toString, asInstanceOf, isInstanceOf)
package <root> completions ==> List(target, project, lib_managed, quicktime, ch, scala, apple, java, com, sunw, javax, sun, org, asInstanceOf, isInstanceOf, toString)
package <root> -> 'ps' ==> None
object Predef -> 'ps' ==> None
package scala -> 'ps' ==> None
package java.lang -> 'ps' ==> None
tryCompletion(Parsed(ps.head./8), _) lastBuf = ps.head., lastCursor = 8, p.position = 8
asInstanceOf isInstanceOf toString
Muhtemelen REPL yazarı Paul Phillips'in tavsiyelerini almalısınız. Eminim ki (zaten uygulanmadıysa) bu zaten kabul edilir ve zorlukları herkesten daha iyi bilir. -Dscala.repl.debug` için
+1. Muhtemelen replinin içinden de ayarlanabilir, değil mi? –