forked from scala/scala
/
TastyFormat.scala
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/
TastyFormat.scala
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/*
* Scala (https://www.scala-lang.org)
*
* Copyright EPFL and Lightbend, Inc.
*
* Licensed under Apache License 2.0
* (http://www.apache.org/licenses/LICENSE-2.0).
*
* See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*/
package scala.tools.tasty
object TastyFormat {
final val header: Array[Int] = Array(0x5C, 0xA1, 0xAB, 0x1F)
val MajorVersion: Int = 26
val MinorVersion: Int = 1
final val ASTsSection = "ASTs"
final val PositionsSection = "Positions"
final val CommentsSection = "Comments"
/** Tags used to serialize names */
class NameTags {
final val UTF8 = 1 // A simple name in UTF8 encoding.
final val QUALIFIED = 2 // A fully qualified name `<prefix>.<suffix>`.
final val EXPANDED = 3 // An expanded name `<prefix>$$<suffix>`,
// used by Scala-2 for private names.
final val EXPANDPREFIX = 4 // An expansion prefix `<prefix>$<suffix>`,
// used by Scala-2 for private names.
final val UNIQUE = 10 // A unique name `<name>$<num>` where `<num>`
// is used only once for each `<name>`.
final val DEFAULTGETTER = 11 // The name `<meth-name>$default$<param-num>`
// of a default getter that returns a default argument.
final val SUPERACCESSOR = 20 // The name of a super accessor `super$name` created by SuperAccesors.
final val INLINEACCESSOR = 21 // The name of an inline accessor `inline$name`
final val BODYRETAINER = 22 // The name of a synthetic method that retains the runtime
// body of an inline method
final val OBJECTCLASS = 23 // The name of an object class (or: module class) `<name>$`.
final val TARGETSIGNED = 62 // A triple of a name, a targetname and a signature, used to identify
// possibly overloaded methods that carry a @targetName annotation.
final val SIGNED = 63 // A pair of a name and a signature, used to identify
// possibly overloaded methods.
}
object NameTags extends NameTags
// Position header
final val SOURCE = 4
// AST tags
// Cat. 1: tag
final val firstSimpleTreeTag = UNITconst
final val UNITconst = 2
final val FALSEconst = 3
final val TRUEconst = 4
final val NULLconst = 5
final val PRIVATE = 6
final val INTERNAL = 7
final val PROTECTED = 8
final val ABSTRACT = 9
final val FINAL = 10
final val SEALED = 11
final val CASE = 12
final val IMPLICIT = 13
final val LAZY = 14
final val OVERRIDE = 15
final val INLINEPROXY = 16
final val INLINE = 17
final val STATIC = 18
final val OBJECT = 19
final val TRAIT = 20
final val ENUM = 21
final val LOCAL = 22
final val SYNTHETIC = 23
final val ARTIFACT = 24
final val MUTABLE = 25
final val FIELDaccessor = 26
final val CASEaccessor = 27
final val COVARIANT = 28
final val CONTRAVARIANT = 29
final val HASDEFAULT = 31
final val STABLE = 32
final val MACRO = 33
final val ERASED = 34
final val OPAQUE = 35
final val EXTENSION = 36
final val GIVEN = 37
final val PARAMsetter = 38
final val EXPORTED = 39
final val OPEN = 40
final val PARAMEND = 41
final val PARAMalias = 42
final val TRANSPARENT = 43
final val INFIX = 44
// Cat. 2: tag Nat
final val SHAREDterm = 50
final val SHAREDtype = 51
final val TERMREFdirect = 52
final val TYPEREFdirect = 53
final val TERMREFpkg = 54
final val TYPEREFpkg = 55
final val RECthis = 56
final val BYTEconst = 57
final val SHORTconst = 58
final val CHARconst = 59
final val INTconst = 60
final val LONGconst = 61
final val FLOATconst = 62
final val DOUBLEconst = 63
final val STRINGconst = 64
final val IMPORTED = 65
final val RENAMED = 66
// Cat. 3: tag AST
final val THIS = 80
final val QUALTHIS = 81
final val CLASSconst = 82
final val BYNAMEtype = 83
final val BYNAMEtpt = 84
final val NEW = 85
final val THROW = 86
final val IMPLICITarg = 87
final val PRIVATEqualified = 88
final val PROTECTEDqualified = 89
final val RECtype = 90
final val SINGLETONtpt = 91
final val BOUNDED = 92
// Cat. 4: tag Nat AST
final val IDENT = 110
final val IDENTtpt = 111
final val SELECT = 112
final val SELECTtpt = 113
final val TERMREFsymbol = 114
final val TERMREF = 115
final val TYPEREFsymbol = 116
final val TYPEREF = 117
final val SELFDEF = 118
final val NAMEDARG = 119
// Cat. 5: tag Length ...
final val PACKAGE = 128
final val VALDEF = 129
final val DEFDEF = 130
final val TYPEDEF = 131
final val IMPORT = 132
final val TYPEPARAM = 133
final val PARAM = 134
final val APPLY = 136
final val TYPEAPPLY = 137
final val TYPED = 138
final val ASSIGN = 139
final val BLOCK = 140
final val IF = 141
final val LAMBDA = 142
final val MATCH = 143
final val RETURN = 144
final val WHILE = 145
final val TRY = 146
final val INLINED = 147
final val SELECTouter = 148
final val REPEATED = 149
final val BIND = 150
final val ALTERNATIVE = 151
final val UNAPPLY = 152
final val ANNOTATEDtype = 153
final val ANNOTATEDtpt = 154
final val CASEDEF = 155
final val TEMPLATE = 156
final val SUPER = 157
final val SUPERtype = 158
final val REFINEDtype = 159
final val REFINEDtpt = 160
final val APPLIEDtype = 161
final val APPLIEDtpt = 162
final val TYPEBOUNDS = 163
final val TYPEBOUNDStpt = 164
final val ANDtype = 165
final val ORtype = 167
final val POLYtype = 169
final val TYPELAMBDAtype = 170
final val LAMBDAtpt = 171
final val PARAMtype = 172
final val ANNOTATION = 173
final val TERMREFin = 174
final val TYPEREFin = 175
final val SELECTin = 176
final val EXPORT = 177
final val METHODtype = 180
final val MATCHtype = 190
final val MATCHtpt = 191
final val MATCHCASEtype = 192
final val HOLE = 255
final val firstNatTreeTag = SHAREDterm
final val firstASTTreeTag = THIS
final val firstNatASTTreeTag = IDENT
final val firstLengthTreeTag = PACKAGE
/** Useful for debugging */
def isLegalTag(tag: Int): Boolean =
firstSimpleTreeTag <= tag && tag <= INFIX ||
firstNatTreeTag <= tag && tag <= RENAMED ||
firstASTTreeTag <= tag && tag <= BOUNDED ||
firstNatASTTreeTag <= tag && tag <= NAMEDARG ||
firstLengthTreeTag <= tag && tag <= MATCHtpt ||
tag == HOLE
def isParamTag(tag: Int): Boolean = tag == PARAM || tag == TYPEPARAM
def isModifierTag(tag: Int): Boolean = tag match {
case PRIVATE
| INTERNAL
| PROTECTED
| ABSTRACT
| FINAL
| SEALED
| CASE
| IMPLICIT
| GIVEN
| ERASED
| LAZY
| OVERRIDE
| INLINE
| INLINEPROXY
| MACRO
| OPAQUE
| STATIC
| OBJECT
| TRAIT
| TRANSPARENT
| INFIX
| ENUM
| LOCAL
| SYNTHETIC
| ARTIFACT
| MUTABLE
| FIELDaccessor
| CASEaccessor
| COVARIANT
| CONTRAVARIANT
| HASDEFAULT
| STABLE
| EXTENSION
| PARAMsetter
| PARAMalias
| EXPORTED
| OPEN
| ANNOTATION
| PRIVATEqualified
| PROTECTEDqualified => true
case _ => false
}
def isTypeTreeTag(tag: Int): Boolean = tag match {
case IDENTtpt
| SELECTtpt
| SINGLETONtpt
| REFINEDtpt
| APPLIEDtpt
| LAMBDAtpt
| TYPEBOUNDStpt
| ANNOTATEDtpt
| BYNAMEtpt
| MATCHtpt
| BIND => true
case _ => false
}
def astTagToString(tag: Int): String = tag match {
case UNITconst => "UNITconst"
case FALSEconst => "FALSEconst"
case TRUEconst => "TRUEconst"
case NULLconst => "NULLconst"
case PRIVATE => "PRIVATE"
case INTERNAL => "INTERNAL"
case PROTECTED => "PROTECTED"
case ABSTRACT => "ABSTRACT"
case FINAL => "FINAL"
case SEALED => "SEALED"
case CASE => "CASE"
case IMPLICIT => "IMPLICIT"
case ERASED => "ERASED"
case LAZY => "LAZY"
case OVERRIDE => "OVERRIDE"
case INLINE => "INLINE"
case INLINEPROXY => "INLINEPROXY"
case MACRO => "MACRO"
case OPAQUE => "OPAQUE"
case STATIC => "STATIC"
case OBJECT => "OBJECT"
case TRAIT => "TRAIT"
case ENUM => "ENUM"
case TRANSPARENT => "TRANSPARENT"
case INFIX => "INFIX"
case LOCAL => "LOCAL"
case SYNTHETIC => "SYNTHETIC"
case ARTIFACT => "ARTIFACT"
case MUTABLE => "MUTABLE"
case FIELDaccessor => "FIELDaccessor"
case CASEaccessor => "CASEaccessor"
case COVARIANT => "COVARIANT"
case CONTRAVARIANT => "CONTRAVARIANT"
case HASDEFAULT => "HASDEFAULT"
case STABLE => "STABLE"
case EXTENSION => "EXTENSION"
case GIVEN => "GIVEN"
case PARAMsetter => "PARAMsetter"
case EXPORTED => "EXPORTED"
case OPEN => "OPEN"
case PARAMEND => "PARAMEND"
case PARAMalias => "PARAMalias"
case SHAREDterm => "SHAREDterm"
case SHAREDtype => "SHAREDtype"
case TERMREFdirect => "TERMREFdirect"
case TYPEREFdirect => "TYPEREFdirect"
case TERMREFpkg => "TERMREFpkg"
case TYPEREFpkg => "TYPEREFpkg"
case RECthis => "RECthis"
case BYTEconst => "BYTEconst"
case SHORTconst => "SHORTconst"
case CHARconst => "CHARconst"
case INTconst => "INTconst"
case LONGconst => "LONGconst"
case FLOATconst => "FLOATconst"
case DOUBLEconst => "DOUBLEconst"
case STRINGconst => "STRINGconst"
case RECtype => "RECtype"
case IDENT => "IDENT"
case IDENTtpt => "IDENTtpt"
case SELECT => "SELECT"
case SELECTtpt => "SELECTtpt"
case TERMREFsymbol => "TERMREFsymbol"
case TERMREF => "TERMREF"
case TYPEREFsymbol => "TYPEREFsymbol"
case TYPEREF => "TYPEREF"
case PACKAGE => "PACKAGE"
case VALDEF => "VALDEF"
case DEFDEF => "DEFDEF"
case TYPEDEF => "TYPEDEF"
case IMPORT => "IMPORT"
case TYPEPARAM => "TYPEPARAM"
case PARAM => "PARAM"
case IMPORTED => "IMPORTED"
case RENAMED => "RENAMED"
case BOUNDED => "BOUNDED"
case APPLY => "APPLY"
case TYPEAPPLY => "TYPEAPPLY"
case NEW => "NEW"
case THROW => "THROW"
case TYPED => "TYPED"
case NAMEDARG => "NAMEDARG"
case ASSIGN => "ASSIGN"
case BLOCK => "BLOCK"
case IF => "IF"
case LAMBDA => "LAMBDA"
case MATCH => "MATCH"
case RETURN => "RETURN"
case WHILE => "WHILE"
case INLINED => "INLINED"
case SELECTouter => "SELECTouter"
case TRY => "TRY"
case REPEATED => "REPEATED"
case BIND => "BIND"
case ALTERNATIVE => "ALTERNATIVE"
case UNAPPLY => "UNAPPLY"
case ANNOTATEDtype => "ANNOTATEDtype"
case ANNOTATEDtpt => "ANNOTATEDtpt"
case CASEDEF => "CASEDEF"
case IMPLICITarg => "IMPLICITarg"
case TEMPLATE => "TEMPLATE"
case SELFDEF => "SELFDEF"
case THIS => "THIS"
case QUALTHIS => "QUALTHIS"
case SUPER => "SUPER"
case CLASSconst => "CLASSconst"
case SINGLETONtpt => "SINGLETONtpt"
case SUPERtype => "SUPERtype"
case TERMREFin => "TERMREFin"
case TYPEREFin => "TYPEREFin"
case SELECTin => "SELECTin"
case EXPORT => "EXPORT"
case REFINEDtype => "REFINEDtype"
case REFINEDtpt => "REFINEDtpt"
case APPLIEDtype => "APPLIEDtype"
case APPLIEDtpt => "APPLIEDtpt"
case TYPEBOUNDS => "TYPEBOUNDS"
case TYPEBOUNDStpt => "TYPEBOUNDStpt"
case ANDtype => "ANDtype"
case ORtype => "ORtype"
case BYNAMEtype => "BYNAMEtype"
case BYNAMEtpt => "BYNAMEtpt"
case POLYtype => "POLYtype"
case METHODtype => "METHODtype"
case TYPELAMBDAtype => "TYPELAMBDAtype"
case LAMBDAtpt => "LAMBDAtpt"
case MATCHtype => "MATCHtype"
case MATCHCASEtype => "MATCHCASEtype"
case MATCHtpt => "MATCHtpt"
case PARAMtype => "PARAMtype"
case ANNOTATION => "ANNOTATION"
case PRIVATEqualified => "PRIVATEqualified"
case PROTECTEDqualified => "PROTECTEDqualified"
case HOLE => "HOLE"
}
/** @return If non-negative, the number of leading references (represented as nats) of a length/trees entry.
* If negative, minus the number of leading non-reference trees.
*/
def numRefs(tag: Int): Int = tag match {
case VALDEF | DEFDEF | TYPEDEF | TYPEPARAM | PARAM | NAMEDARG | RETURN | BIND |
SELFDEF | REFINEDtype | TERMREFin | TYPEREFin | SELECTin | HOLE => 1
case RENAMED | PARAMtype => 2
case POLYtype | TYPELAMBDAtype | METHODtype => -1
case _ => 0
}
}