diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/NameOps.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/NameOps.scala | 432 |
1 files changed, 0 insertions, 432 deletions
diff --git a/src/dotty/tools/dotc/core/NameOps.scala b/src/dotty/tools/dotc/core/NameOps.scala deleted file mode 100644 index 4c7f5b0a9..000000000 --- a/src/dotty/tools/dotc/core/NameOps.scala +++ /dev/null @@ -1,432 +0,0 @@ -package dotty.tools.dotc -package core - -import java.security.MessageDigest -import scala.annotation.switch -import scala.io.Codec -import Names._, StdNames._, Contexts._, Symbols._, Flags._ -import Decorators.StringDecorator -import util.{Chars, NameTransformer} -import Chars.isOperatorPart - -object NameOps { - - final object compactify { - lazy val md5 = MessageDigest.getInstance("MD5") - - /** COMPACTIFY - * - * The hashed name has the form (prefix + marker + md5 + marker + suffix), where - * - prefix/suffix.length = MaxNameLength / 4 - * - md5.length = 32 - * - * We obtain the formula: - * - * FileNameLength = 2*(MaxNameLength / 4) + 2.marker.length + 32 + 6 - * - * (+6 for ".class"). MaxNameLength can therefore be computed as follows: - */ - def apply(s: String)(implicit ctx: Context): String = { - val marker = "$$$$" - val limit: Int = ctx.settings.maxClassfileName.value - val MaxNameLength = (limit - 6) min 2 * (limit - 6 - 2 * marker.length - 32) - - def toMD5(s: String, edge: Int): String = { - val prefix = s take edge - val suffix = s takeRight edge - - val cs = s.toArray - val bytes = Codec toUTF8 cs - md5 update bytes - val md5chars = (md5.digest() map (b => (b & 0xFF).toHexString)).mkString - - prefix + marker + md5chars + marker + suffix - } - - if (s.length <= MaxNameLength) s else toMD5(s, MaxNameLength / 4) - } - } - - class PrefixNameExtractor(pre: TermName) { - def apply(name: TermName): TermName = pre ++ name - def unapply(name: TermName): Option[TermName] = - if (name startsWith pre) Some(name.drop(pre.length).asTermName) else None - } - - object SuperAccessorName extends PrefixNameExtractor(nme.SUPER_PREFIX) - object InitializerName extends PrefixNameExtractor(nme.INITIALIZER_PREFIX) - - implicit class NameDecorator[N <: Name](val name: N) extends AnyVal { - import nme._ - - def likeTyped(n: PreName): N = - (if (name.isTermName) n.toTermName else n.toTypeName).asInstanceOf[N] - - def isConstructorName = name == CONSTRUCTOR || name == TRAIT_CONSTRUCTOR - def isStaticConstructorName = name == STATIC_CONSTRUCTOR - def isExceptionResultName = name startsWith EXCEPTION_RESULT_PREFIX - def isImplClassName = name endsWith IMPL_CLASS_SUFFIX - def isLocalDummyName = name startsWith LOCALDUMMY_PREFIX - def isLoopHeaderLabel = (name startsWith WHILE_PREFIX) || (name startsWith DO_WHILE_PREFIX) - def isProtectedAccessorName = name startsWith PROTECTED_PREFIX - def isReplWrapperName = name containsSlice INTERPRETER_IMPORT_WRAPPER - def isTraitSetterName = name containsSlice TRAIT_SETTER_SEPARATOR - def isSetterName = name endsWith SETTER_SUFFIX - def isSingletonName = name endsWith SINGLETON_SUFFIX - def isModuleClassName = name endsWith MODULE_SUFFIX - def isAvoidClashName = name endsWith AVOID_CLASH_SUFFIX - def isImportName = name startsWith IMPORT - def isFieldName = name endsWith LOCAL_SUFFIX - def isShadowedName = name.length > 0 && name.head == '(' && name.startsWith(nme.SHADOWED) - def isDefaultGetterName = name.isTermName && name.asTermName.defaultGetterIndex >= 0 - def isScala2LocalSuffix = name.endsWith(" ") - def isModuleVarName(name: Name): Boolean = - name.stripAnonNumberSuffix endsWith MODULE_VAR_SUFFIX - def isSelectorName = name.startsWith(" ") && name.tail.forall(_.isDigit) - def isLazyLocal = name.endsWith(nme.LAZY_LOCAL) - def isOuterSelect = name.endsWith(nme.OUTER_SELECT) - def isInlineAccessor = name.startsWith(nme.INLINE_ACCESSOR_PREFIX) - - /** Is name a variable name? */ - def isVariableName: Boolean = name.length > 0 && { - val first = name.head - (((first.isLower && first.isLetter) || first == '_') - && (name != false_) - && (name != true_) - && (name != null_)) - } - - def isOpAssignmentName: Boolean = name match { - case raw.NE | raw.LE | raw.GE | EMPTY => - false - case _ => - name.length > 0 && name.last == '=' && name.head != '=' && isOperatorPart(name.head) - } - - /** If the name ends with $nn where nn are - * all digits, strip the $ and the digits. - * Otherwise return the argument. - */ - def stripAnonNumberSuffix: Name = { - var pos = name.length - while (pos > 0 && name(pos - 1).isDigit) - pos -= 1 - - if (pos > 0 && pos < name.length && name(pos - 1) == '$') - name take (pos - 1) - else - name - } - - /** Convert this module name to corresponding module class name */ - def moduleClassName: TypeName = (name ++ tpnme.MODULE_SUFFIX).toTypeName - - /** Convert this module class name to corresponding source module name */ - def sourceModuleName: TermName = stripModuleClassSuffix.toTermName - - /** If name ends in module class suffix, drop it */ - def stripModuleClassSuffix: Name = - if (isModuleClassName) name dropRight MODULE_SUFFIX.length else name - - /** Append a suffix so that this name does not clash with another name in the same scope */ - def avoidClashName: TermName = (name ++ AVOID_CLASH_SUFFIX).toTermName - - /** If name ends in "avoid clash" suffix, drop it */ - def stripAvoidClashSuffix: Name = - if (isAvoidClashName) name dropRight AVOID_CLASH_SUFFIX.length else name - - /** If flags is a ModuleClass but not a Package, add module class suffix */ - def adjustIfModuleClass(flags: Flags.FlagSet): N = { - if (flags is (ModuleClass, butNot = Package)) name.asTypeName.moduleClassName - else stripAvoidClashSuffix - }.asInstanceOf[N] - - /** The superaccessor for method with given name */ - def superName: TermName = (nme.SUPER_PREFIX ++ name).toTermName - - /** The expanded name of `name` relative to given class `base`. - */ - def expandedName(base: Symbol, separator: Name)(implicit ctx: Context): N = - expandedName(if (base is Flags.ExpandedName) base.name else base.fullNameSeparated("$"), separator) - - def expandedName(base: Symbol)(implicit ctx: Context): N = expandedName(base, nme.EXPAND_SEPARATOR) - - /** The expanded name of `name` relative to `basename` with given `separator` - */ - def expandedName(prefix: Name, separator: Name = nme.EXPAND_SEPARATOR): N = - name.fromName(prefix ++ separator ++ name).asInstanceOf[N] - - def expandedName(prefix: Name): N = expandedName(prefix, nme.EXPAND_SEPARATOR) - - /** Revert the expanded name. Note: This currently gives incorrect results - * if the normal name contains `nme.EXPAND_SEPARATOR`, i.e. two consecutive '$' - * signs. This can happen for instance if a super accessor is paired with - * an encoded name, e.g. super$$plus$eq. See #765. - */ - def unexpandedName: N = { - var idx = name.lastIndexOfSlice(nme.EXPAND_SEPARATOR) - - // Hack to make super accessors from traits work. They would otherwise fail because of #765 - // TODO: drop this once we have more robust name handling - if (idx > FalseSuperLength && name.slice(idx - FalseSuperLength, idx) == FalseSuper) - idx -= FalseSuper.length - - if (idx < 0) name else (name drop (idx + nme.EXPAND_SEPARATOR.length)).asInstanceOf[N] - } - - def expandedPrefix: N = { - val idx = name.lastIndexOfSlice(nme.EXPAND_SEPARATOR) - assert(idx >= 0) - name.take(idx).asInstanceOf[N] - } - - def shadowedName: N = likeTyped(nme.SHADOWED ++ name) - - def revertShadowed: N = likeTyped(name.drop(nme.SHADOWED.length)) - - def implClassName: N = likeTyped(name ++ tpnme.IMPL_CLASS_SUFFIX) - - def errorName: N = likeTyped(name ++ nme.ERROR) - - def freshened(implicit ctx: Context): N = - likeTyped( - if (name.isModuleClassName) name.stripModuleClassSuffix.freshened.moduleClassName - else likeTyped(ctx.freshName(name ++ NameTransformer.NAME_JOIN_STRING))) - - /** Translate a name into a list of simple TypeNames and TermNames. - * In all segments before the last, type/term is determined by whether - * the following separator char is '.' or '#'. The last segment - * is of the same type as the original name. - * - * Examples: - * - * package foo { - * object Lorax { object Wog ; class Wog } - * class Lorax { object Zax ; class Zax } - * } - * - * f("foo.Lorax".toTermName) == List("foo": Term, "Lorax": Term) // object Lorax - * f("foo.Lorax".toTypeName) == List("foo": Term, "Lorax": Type) // class Lorax - * f("Lorax.Wog".toTermName) == List("Lorax": Term, "Wog": Term) // object Wog - * f("Lorax.Wog".toTypeName) == List("Lorax": Term, "Wog": Type) // class Wog - * f("Lorax#Zax".toTermName) == List("Lorax": Type, "Zax": Term) // object Zax - * f("Lorax#Zax".toTypeName) == List("Lorax": Type, "Zax": Type) // class Zax - * - * Note that in actual scala syntax you cannot refer to object Zax without an - * instance of Lorax, so Lorax#Zax could only mean the type. One might think - * that Lorax#Zax.type would work, but this is not accepted by the parser. - * For the purposes of referencing that object, the syntax is allowed. - */ - def segments: List[Name] = { - def mkName(name: Name, follow: Char): Name = - if (follow == '.') name.toTermName else name.toTypeName - - name.indexWhere(ch => ch == '.' || ch == '#') match { - case -1 => - if (name.isEmpty) scala.Nil else name :: scala.Nil - case idx => - mkName(name take idx, name(idx)) :: (name drop (idx + 1)).segments - } - } - - /** The name of the generic runtime operation corresponding to an array operation */ - def genericArrayOp: TermName = name match { - case nme.apply => nme.array_apply - case nme.length => nme.array_length - case nme.update => nme.array_update - case nme.clone_ => nme.array_clone - } - - /** The name of the primitive runtime operation corresponding to an array operation */ - def primitiveArrayOp: TermName = name match { - case nme.apply => nme.primitive.arrayApply - case nme.length => nme.primitive.arrayLength - case nme.update => nme.primitive.arrayUpdate - case nme.clone_ => nme.clone_ - } - - def specializedFor(classTargs: List[Types.Type], classTargsNames: List[Name], methodTargs: List[Types.Type], methodTarsNames: List[Name])(implicit ctx: Context): name.ThisName = { - - def typeToTag(tp: Types.Type): Name = { - tp.classSymbol match { - case t if t eq defn.IntClass => nme.specializedTypeNames.Int - case t if t eq defn.BooleanClass => nme.specializedTypeNames.Boolean - case t if t eq defn.ByteClass => nme.specializedTypeNames.Byte - case t if t eq defn.LongClass => nme.specializedTypeNames.Long - case t if t eq defn.ShortClass => nme.specializedTypeNames.Short - case t if t eq defn.FloatClass => nme.specializedTypeNames.Float - case t if t eq defn.UnitClass => nme.specializedTypeNames.Void - case t if t eq defn.DoubleClass => nme.specializedTypeNames.Double - case t if t eq defn.CharClass => nme.specializedTypeNames.Char - case _ => nme.specializedTypeNames.Object - } - } - - val methodTags: Seq[Name] = (methodTargs zip methodTarsNames).sortBy(_._2).map(x => typeToTag(x._1)) - val classTags: Seq[Name] = (classTargs zip classTargsNames).sortBy(_._2).map(x => typeToTag(x._1)) - - name.fromName(name ++ nme.specializedTypeNames.prefix ++ - methodTags.fold(nme.EMPTY)(_ ++ _) ++ nme.specializedTypeNames.separator ++ - classTags.fold(nme.EMPTY)(_ ++ _) ++ nme.specializedTypeNames.suffix) - } - - /** If name length exceeds allowable limit, replace part of it by hash */ - def compactified(implicit ctx: Context): TermName = termName(compactify(name.toString)) - } - - // needed??? - private val Boxed = Map[TypeName, TypeName]( - tpnme.Boolean -> jtpnme.BoxedBoolean, - tpnme.Byte -> jtpnme.BoxedByte, - tpnme.Char -> jtpnme.BoxedCharacter, - tpnme.Short -> jtpnme.BoxedShort, - tpnme.Int -> jtpnme.BoxedInteger, - tpnme.Long -> jtpnme.BoxedLong, - tpnme.Float -> jtpnme.BoxedFloat, - tpnme.Double -> jtpnme.BoxedDouble) - - implicit class TermNameDecorator(val name: TermName) extends AnyVal { - import nme._ - - def setterName: TermName = - if (name.isFieldName) name.fieldToGetter.setterName - else name ++ SETTER_SUFFIX - - def getterName: TermName = - if (name.isFieldName) fieldToGetter - else setterToGetter - - def fieldName: TermName = - if (name.isSetterName) { - if (name.isTraitSetterName) { - // has form <$-separated-trait-name>$_setter_$ `name`_$eq - val start = name.indexOfSlice(TRAIT_SETTER_SEPARATOR) + TRAIT_SETTER_SEPARATOR.length - val end = name.indexOfSlice(SETTER_SUFFIX) - name.slice(start, end) ++ LOCAL_SUFFIX - } else getterName.fieldName - } - else name ++ LOCAL_SUFFIX - - private def setterToGetter: TermName = { - assert(name.endsWith(SETTER_SUFFIX), name + " is referenced as a setter but has wrong name format") - name.take(name.length - SETTER_SUFFIX.length).asTermName - } - - def fieldToGetter: TermName = { - assert(name.isFieldName) - name.take(name.length - LOCAL_SUFFIX.length).asTermName - } - - /** Nominally, name$default$N, encoded for <init> - * @param Post the parameters position. - * @note Default getter name suffixes start at 1, so `pos` has to be adjusted by +1 - */ - def defaultGetterName(pos: Int): TermName = { - val prefix = if (name.isConstructorName) DEFAULT_GETTER_INIT else name - prefix ++ DEFAULT_GETTER ++ (pos + 1).toString - } - - /** Nominally, name from name$default$N, CONSTRUCTOR for <init> */ - def defaultGetterToMethod: TermName = { - val p = name.indexOfSlice(DEFAULT_GETTER) - if (p >= 0) { - val q = name.take(p).asTermName - // i.e., if (q.decoded == CONSTRUCTOR.toString) CONSTRUCTOR else q - if (q == DEFAULT_GETTER_INIT) CONSTRUCTOR else q - } else name - } - - /** If this is a default getter, its index (starting from 0), else -1 */ - def defaultGetterIndex: Int = { - var i = name.length - while (i > 0 && name(i - 1).isDigit) i -= 1 - if (i > 0 && i < name.length && name.take(i).endsWith(DEFAULT_GETTER)) - name.drop(i).toString.toInt - 1 - else - -1 - } - - def stripScala2LocalSuffix: TermName = - if (name.isScala2LocalSuffix) name.init.asTermName else name - - /** The name of an accessor for protected symbols. */ - def protectedAccessorName: TermName = - PROTECTED_PREFIX ++ name.unexpandedName - - /** The name of a setter for protected symbols. Used for inherited Java fields. */ - def protectedSetterName: TermName = - PROTECTED_SET_PREFIX ++ name.unexpandedName - - def moduleVarName: TermName = - name ++ MODULE_VAR_SUFFIX - - /** The name unary_x for a prefix operator x */ - def toUnaryName: TermName = name match { - case raw.MINUS => UNARY_- - case raw.PLUS => UNARY_+ - case raw.TILDE => UNARY_~ - case raw.BANG => UNARY_! - case _ => name - } - - /** The name of a method which stands in for a primitive operation - * during structural type dispatch. - */ - def primitiveInfixMethodName: TermName = name match { - case OR => takeOr - case XOR => takeXor - case AND => takeAnd - case EQ => testEqual - case NE => testNotEqual - case ADD => add - case SUB => subtract - case MUL => multiply - case DIV => divide - case MOD => takeModulo - case LSL => shiftSignedLeft - case LSR => shiftLogicalRight - case ASR => shiftSignedRight - case LT => testLessThan - case LE => testLessOrEqualThan - case GE => testGreaterOrEqualThan - case GT => testGreaterThan - case ZOR => takeConditionalOr - case ZAND => takeConditionalAnd - case _ => NO_NAME - } - - /** Postfix/prefix, really. - */ - def primitivePostfixMethodName: TermName = name match { - case UNARY_! => takeNot - case UNARY_+ => positive - case UNARY_- => negate - case UNARY_~ => complement - case `toByte` => toByte - case `toShort` => toShort - case `toChar` => toCharacter - case `toInt` => toInteger - case `toLong` => toLong - case `toFloat` => toFloat - case `toDouble` => toDouble - case _ => NO_NAME - } - - def primitiveMethodName: TermName = - primitiveInfixMethodName match { - case NO_NAME => primitivePostfixMethodName - case name => name - } - - def lazyLocalName = name ++ nme.LAZY_LOCAL - def nonLazyName = { - assert(name.isLazyLocal) - name.dropRight(nme.LAZY_LOCAL.length) - } - - def inlineAccessorName = nme.INLINE_ACCESSOR_PREFIX ++ name ++ "$" - } - - private final val FalseSuper = "$$super".toTermName - private val FalseSuperLength = FalseSuper.length -} |