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Scala example source code file (ScalaPrimitives.scala)
This example Scala source code file (ScalaPrimitives.scala) is included in the DevDaily.com
"Java Source Code
Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.
The Scala ScalaPrimitives.scala source code
/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package backend
import scala.tools.nsc.backend.icode._
import scala.collection.{ mutable, immutable }
/**
* Scala primitive operations are represented as methods in Any and
* AnyVal subclasses. Here we demultiplex them by providing a mapping
* from their symbols to integers. Different methods exist for
* different value types, but with the same meaning (like plus, minus,
* etc.). They will all be mapped to the same int.
*
* <p>Note: The three equal methods have the following semantics:
* <ul>
* <li>
* <code>"==" checks for null, and if non-null, calls
* <code>java.lang.Object.equals
* <code>(class: Any; modifier: final). Primitive: EQ
* </li>
* <li>
* <code>"eq" usual reference comparison
* <code>(class: AnyRef; modifier: final). Primitive: ID
* </li>
* <li>
* <code>"equals" user-defined equality (Java semantics)
* <code>(class: Object; modifier: none). Primitive: EQUALS
* </li>
* </ul>
*
* Inspired from the scalac compiler.
*/
abstract class ScalaPrimitives {
val global: Global
import global._
import definitions._
import global.icodes._
// Arithmetic unary operations
final val POS = 1 // +x
final val NEG = 2 // -x
final val NOT = 3 // ~x
// Arithmetic binary operations
final val ADD = 10 // x + y
final val SUB = 11 // x - y
final val MUL = 12 // x * y
final val DIV = 13 // x / y
final val MOD = 14 // x % y
// Bitwise operations
final val OR = 20 // x | y
final val XOR = 21 // x ^ y
final val AND = 22 // x & y
// Shift operations
final val LSL = 30 // x << y
final val LSR = 31 // x >>> y
final val ASR = 32 // x >> y
// Comparison operations
final val ID = 40 // x eq y
final val NI = 41 // x ne y
final val EQ = 42 // x == y
final val NE = 43 // x != y
final val LT = 44 // x < y
final val LE = 45 // x <= y
final val GE = 46 // x > y
final val GT = 47 // x >= y
// Boolean unary operations
final val ZNOT = 50 // !x
// Boolean binary operations
final val ZOR = 60 // x || y
final val ZAND = 61 // x && y
// Array operations
final val LENGTH = 70 // x.length
final val APPLY = 71 // x(y)
final val UPDATE = 72 // x(y) = z
// Any operations
final val IS = 80 // x.is[y]
final val AS = 81 // x.as[y]
final val HASH = 87 // x.##
// AnyRef operations
final val SYNCHRONIZED = 90 // x.synchronized(y)
// String operations
final val CONCAT = 100 // String.valueOf(x)+String.valueOf(y)
// coercions
final val COERCE = 101
// RunTime operations
final val BOX = 110 // RunTime.box_<X>(x)
final val UNBOX = 111 // RunTime.unbox_<X>(x)
final val NEW_ZARRAY = 112 // RunTime.zarray(x)
final val NEW_BARRAY = 113 // RunTime.barray(x)
final val NEW_SARRAY = 114 // RunTime.sarray(x)
final val NEW_CARRAY = 115 // RunTime.carray(x)
final val NEW_IARRAY = 116 // RunTime.iarray(x)
final val NEW_LARRAY = 117 // RunTime.larray(x)
final val NEW_FARRAY = 118 // RunTime.farray(x)
final val NEW_DARRAY = 119 // RunTime.darray(x)
final val NEW_OARRAY = 120 // RunTime.oarray(x)
final val ZARRAY_LENGTH = 131 // RunTime.zarray_length(x)
final val BARRAY_LENGTH = 132 // RunTime.barray_length(x)
final val SARRAY_LENGTH = 133 // RunTime.sarray_length(x)
final val CARRAY_LENGTH = 134 // RunTime.carray_length(x)
final val IARRAY_LENGTH = 135 // RunTime.iarray_length(x)
final val LARRAY_LENGTH = 136 // RunTime.larray_length(x)
final val FARRAY_LENGTH = 137 // RunTime.farray_length(x)
final val DARRAY_LENGTH = 138 // RunTime.darray_length(x)
final val OARRAY_LENGTH = 139 // RunTime.oarray_length(x)
final val ZARRAY_GET = 140 // RunTime.zarray_get(x,y)
final val BARRAY_GET = 141 // RunTime.barray_get(x,y)
final val SARRAY_GET = 142 // RunTime.sarray_get(x,y)
final val CARRAY_GET = 143 // RunTime.carray_get(x,y)
final val IARRAY_GET = 144 // RunTime.iarray_get(x,y)
final val LARRAY_GET = 145 // RunTime.larray_get(x,y)
final val FARRAY_GET = 146 // RunTime.farray_get(x,y)
final val DARRAY_GET = 147 // RunTime.darray_get(x,y)
final val OARRAY_GET = 148 // RunTime.oarray_get(x,y)
final val ZARRAY_SET = 150 // RunTime.zarray(x,y,z)
final val BARRAY_SET = 151 // RunTime.barray(x,y,z)
final val SARRAY_SET = 152 // RunTime.sarray(x,y,z)
final val CARRAY_SET = 153 // RunTime.carray(x,y,z)
final val IARRAY_SET = 154 // RunTime.iarray(x,y,z)
final val LARRAY_SET = 155 // RunTime.larray(x,y,z)
final val FARRAY_SET = 156 // RunTime.farray(x,y,z)
final val DARRAY_SET = 157 // RunTime.darray(x,y,z)
final val OARRAY_SET = 158 // RunTime.oarray(x,y,z)
final val B2B = 200 // RunTime.b2b(x)
final val B2S = 201 // RunTime.b2s(x)
final val B2C = 202 // RunTime.b2c(x)
final val B2I = 203 // RunTime.b2i(x)
final val B2L = 204 // RunTime.b2l(x)
final val B2F = 205 // RunTime.b2f(x)
final val B2D = 206 // RunTime.b2d(x)
final val S2B = 210 // RunTime.s2b(x)
final val S2S = 211 // RunTime.s2s(x)
final val S2C = 212 // RunTime.s2c(x)
final val S2I = 213 // RunTime.s2i(x)
final val S2L = 214 // RunTime.s2l(x)
final val S2F = 215 // RunTime.s2f(x)
final val S2D = 216 // RunTime.s2d(x)
final val C2B = 220 // RunTime.c2b(x)
final val C2S = 221 // RunTime.c2s(x)
final val C2C = 222 // RunTime.c2c(x)
final val C2I = 223 // RunTime.c2i(x)
final val C2L = 224 // RunTime.c2l(x)
final val C2F = 225 // RunTime.c2f(x)
final val C2D = 226 // RunTime.c2d(x)
final val I2B = 230 // RunTime.i2b(x)
final val I2S = 231 // RunTime.i2s(x)
final val I2C = 232 // RunTime.i2c(x)
final val I2I = 233 // RunTime.i2i(x)
final val I2L = 234 // RunTime.i2l(x)
final val I2F = 235 // RunTime.i2f(x)
final val I2D = 236 // RunTime.i2d(x)
final val L2B = 240 // RunTime.l2b(x)
final val L2S = 241 // RunTime.l2s(x)
final val L2C = 242 // RunTime.l2c(x)
final val L2I = 243 // RunTime.l2i(x)
final val L2L = 244 // RunTime.l2l(x)
final val L2F = 245 // RunTime.l2f(x)
final val L2D = 246 // RunTime.l2d(x)
final val F2B = 250 // RunTime.f2b(x)
final val F2S = 251 // RunTime.f2s(x)
final val F2C = 252 // RunTime.f2c(x)
final val F2I = 253 // RunTime.f2i(x)
final val F2L = 254 // RunTime.f2l(x)
final val F2F = 255 // RunTime.f2f(x)
final val F2D = 256 // RunTime.f2d(x)
final val D2B = 260 // RunTime.d2b(x)
final val D2S = 261 // RunTime.d2s(x)
final val D2C = 262 // RunTime.d2c(x)
final val D2I = 263 // RunTime.d2i(x)
final val D2L = 264 // RunTime.d2l(x)
final val D2F = 265 // RunTime.d2f(x)
final val D2D = 266 // RunTime.d2d(x)
private val primitives: mutable.Map[Symbol, Int] = new mutable.HashMap()
/** Initialize the primitive map */
def init() {
primitives.clear()
// scala.Any
addPrimitive(Any_==, EQ)
addPrimitive(Any_!=, NE)
addPrimitive(Any_isInstanceOf, IS)
addPrimitive(Any_asInstanceOf, AS)
addPrimitive(Any_##, HASH)
// java.lang.Object
addPrimitive(Object_eq, ID)
addPrimitive(Object_ne, NI)
addPrimitive(Object_==, EQ)
addPrimitive(Object_!=, NE)
addPrimitive(Object_synchronized, SYNCHRONIZED)
addPrimitive(Object_isInstanceOf, IS)
addPrimitive(Object_asInstanceOf, AS)
// java.lang.String
addPrimitive(String_+, CONCAT)
// scala.Array
addPrimitives(ArrayClass, nme.length, LENGTH)
addPrimitives(ArrayClass, nme.apply, APPLY)
addPrimitives(ArrayClass, nme.update, UPDATE)
// scala.Boolean
addPrimitives(BooleanClass, nme.EQ, EQ)
addPrimitives(BooleanClass, nme.NE, NE)
addPrimitives(BooleanClass, nme.UNARY_!, ZNOT)
addPrimitives(BooleanClass, nme.ZOR, ZOR)
addPrimitives(BooleanClass, nme.ZAND, ZAND)
addPrimitives(BooleanClass, nme.OR, OR)
addPrimitives(BooleanClass, nme.AND, AND)
addPrimitives(BooleanClass, nme.XOR, XOR)
// scala.Byte
addPrimitives(ByteClass, nme.EQ, EQ)
addPrimitives(ByteClass, nme.NE, NE)
addPrimitives(ByteClass, nme.ADD, ADD)
addPrimitives(ByteClass, nme.SUB, SUB)
addPrimitives(ByteClass, nme.MUL, MUL)
addPrimitives(ByteClass, nme.DIV, DIV)
addPrimitives(ByteClass, nme.MOD, MOD)
addPrimitives(ByteClass, nme.LT, LT)
addPrimitives(ByteClass, nme.LE, LE)
addPrimitives(ByteClass, nme.GT, GT)
addPrimitives(ByteClass, nme.GE, GE)
addPrimitives(ByteClass, nme.XOR, XOR)
addPrimitives(ByteClass, nme.OR, OR)
addPrimitives(ByteClass, nme.AND, AND)
addPrimitives(ByteClass, nme.LSL, LSL)
addPrimitives(ByteClass, nme.LSR, LSR)
addPrimitives(ByteClass, nme.ASR, ASR)
// conversions
addPrimitives(ByteClass, nme.toByte, B2B)
addPrimitives(ByteClass, nme.toShort, B2S)
addPrimitives(ByteClass, nme.toChar, B2C)
addPrimitives(ByteClass, nme.toInt, B2I)
addPrimitives(ByteClass, nme.toLong, B2L)
// unary methods
addPrimitives(ByteClass, nme.UNARY_+, POS)
addPrimitives(ByteClass, nme.UNARY_-, NEG)
addPrimitives(ByteClass, nme.UNARY_~, NOT)
addPrimitives(ByteClass, nme.toFloat, B2F)
addPrimitives(ByteClass, nme.toDouble, B2D)
// scala.Short
addPrimitives(ShortClass, nme.EQ, EQ)
addPrimitives(ShortClass, nme.NE, NE)
addPrimitives(ShortClass, nme.ADD, ADD)
addPrimitives(ShortClass, nme.SUB, SUB)
addPrimitives(ShortClass, nme.MUL, MUL)
addPrimitives(ShortClass, nme.DIV, DIV)
addPrimitives(ShortClass, nme.MOD, MOD)
addPrimitives(ShortClass, nme.LT, LT)
addPrimitives(ShortClass, nme.LE, LE)
addPrimitives(ShortClass, nme.GT, GT)
addPrimitives(ShortClass, nme.GE, GE)
addPrimitives(ShortClass, nme.XOR, XOR)
addPrimitives(ShortClass, nme.OR, OR)
addPrimitives(ShortClass, nme.AND, AND)
addPrimitives(ShortClass, nme.LSL, LSL)
addPrimitives(ShortClass, nme.LSR, LSR)
addPrimitives(ShortClass, nme.ASR, ASR)
// conversions
addPrimitives(ShortClass, nme.toByte, S2B)
addPrimitives(ShortClass, nme.toShort, S2S)
addPrimitives(ShortClass, nme.toChar, S2C)
addPrimitives(ShortClass, nme.toInt, S2I)
addPrimitives(ShortClass, nme.toLong, S2L)
// unary methods
addPrimitives(ShortClass, nme.UNARY_+, POS)
addPrimitives(ShortClass, nme.UNARY_-, NEG)
addPrimitives(ShortClass, nme.UNARY_~, NOT)
addPrimitives(ShortClass, nme.toFloat, S2F)
addPrimitives(ShortClass, nme.toDouble, S2D)
// scala.Char
addPrimitives(CharClass, nme.EQ, EQ)
addPrimitives(CharClass, nme.NE, NE)
addPrimitives(CharClass, nme.ADD, ADD)
addPrimitives(CharClass, nme.SUB, SUB)
addPrimitives(CharClass, nme.MUL, MUL)
addPrimitives(CharClass, nme.DIV, DIV)
addPrimitives(CharClass, nme.MOD, MOD)
addPrimitives(CharClass, nme.LT, LT)
addPrimitives(CharClass, nme.LE, LE)
addPrimitives(CharClass, nme.GT, GT)
addPrimitives(CharClass, nme.GE, GE)
addPrimitives(CharClass, nme.XOR, XOR)
addPrimitives(CharClass, nme.OR, OR)
addPrimitives(CharClass, nme.AND, AND)
addPrimitives(CharClass, nme.LSL, LSL)
addPrimitives(CharClass, nme.LSR, LSR)
addPrimitives(CharClass, nme.ASR, ASR)
// conversions
addPrimitives(CharClass, nme.toByte, C2B)
addPrimitives(CharClass, nme.toShort, C2S)
addPrimitives(CharClass, nme.toChar, C2C)
addPrimitives(CharClass, nme.toInt, C2I)
addPrimitives(CharClass, nme.toLong, C2L)
// unary methods
addPrimitives(CharClass, nme.UNARY_+, POS)
addPrimitives(CharClass, nme.UNARY_-, NEG)
addPrimitives(CharClass, nme.UNARY_~, NOT)
addPrimitives(CharClass, nme.toFloat, C2F)
addPrimitives(CharClass, nme.toDouble, C2D)
// scala.Int
addPrimitives(IntClass, nme.EQ, EQ)
addPrimitives(IntClass, nme.NE, NE)
addPrimitives(IntClass, nme.ADD, ADD)
addPrimitives(IntClass, nme.SUB, SUB)
addPrimitives(IntClass, nme.MUL, MUL)
addPrimitives(IntClass, nme.DIV, DIV)
addPrimitives(IntClass, nme.MOD, MOD)
addPrimitives(IntClass, nme.LT, LT)
addPrimitives(IntClass, nme.LE, LE)
addPrimitives(IntClass, nme.GT, GT)
addPrimitives(IntClass, nme.GE, GE)
addPrimitives(IntClass, nme.XOR, XOR)
addPrimitives(IntClass, nme.OR, OR)
addPrimitives(IntClass, nme.AND, AND)
addPrimitives(IntClass, nme.LSL, LSL)
addPrimitives(IntClass, nme.LSR, LSR)
addPrimitives(IntClass, nme.ASR, ASR)
// conversions
addPrimitives(IntClass, nme.toByte, I2B)
addPrimitives(IntClass, nme.toShort, I2S)
addPrimitives(IntClass, nme.toChar, I2C)
addPrimitives(IntClass, nme.toInt, I2I)
addPrimitives(IntClass, nme.toLong, I2L)
// unary methods
addPrimitives(IntClass, nme.UNARY_+, POS)
addPrimitives(IntClass, nme.UNARY_-, NEG)
addPrimitives(IntClass, nme.UNARY_~, NOT)
addPrimitives(IntClass, nme.toFloat, I2F)
addPrimitives(IntClass, nme.toDouble, I2D)
// scala.Long
addPrimitives(LongClass, nme.EQ, EQ)
addPrimitives(LongClass, nme.NE, NE)
addPrimitives(LongClass, nme.ADD, ADD)
addPrimitives(LongClass, nme.SUB, SUB)
addPrimitives(LongClass, nme.MUL, MUL)
addPrimitives(LongClass, nme.DIV, DIV)
addPrimitives(LongClass, nme.MOD, MOD)
addPrimitives(LongClass, nme.LT, LT)
addPrimitives(LongClass, nme.LE, LE)
addPrimitives(LongClass, nme.GT, GT)
addPrimitives(LongClass, nme.GE, GE)
addPrimitives(LongClass, nme.XOR, XOR)
addPrimitives(LongClass, nme.OR, OR)
addPrimitives(LongClass, nme.AND, AND)
addPrimitives(LongClass, nme.LSL, LSL)
addPrimitives(LongClass, nme.LSR, LSR)
addPrimitives(LongClass, nme.ASR, ASR)
// conversions
addPrimitives(LongClass, nme.toByte, L2B)
addPrimitives(LongClass, nme.toShort, L2S)
addPrimitives(LongClass, nme.toChar, L2C)
addPrimitives(LongClass, nme.toInt, L2I)
addPrimitives(LongClass, nme.toLong, L2L)
// unary methods
addPrimitives(LongClass, nme.UNARY_+, POS)
addPrimitives(LongClass, nme.UNARY_-, NEG)
addPrimitives(LongClass, nme.UNARY_~, NOT)
addPrimitives(LongClass, nme.toFloat, L2F)
addPrimitives(LongClass, nme.toDouble, L2D)
// scala.Float
addPrimitives(FloatClass, nme.EQ, EQ)
addPrimitives(FloatClass, nme.NE, NE)
addPrimitives(FloatClass, nme.ADD, ADD)
addPrimitives(FloatClass, nme.SUB, SUB)
addPrimitives(FloatClass, nme.MUL, MUL)
addPrimitives(FloatClass, nme.DIV, DIV)
addPrimitives(FloatClass, nme.MOD, MOD)
addPrimitives(FloatClass, nme.LT, LT)
addPrimitives(FloatClass, nme.LE, LE)
addPrimitives(FloatClass, nme.GT, GT)
addPrimitives(FloatClass, nme.GE, GE)
// conversions
addPrimitives(FloatClass, nme.toByte, F2B)
addPrimitives(FloatClass, nme.toShort, F2S)
addPrimitives(FloatClass, nme.toChar, F2C)
addPrimitives(FloatClass, nme.toInt, F2I)
addPrimitives(FloatClass, nme.toLong, F2L)
addPrimitives(FloatClass, nme.toFloat, F2F)
addPrimitives(FloatClass, nme.toDouble, F2D)
// unary methods
addPrimitives(FloatClass, nme.UNARY_+, POS)
addPrimitives(FloatClass, nme.UNARY_-, NEG)
// scala.Double
addPrimitives(DoubleClass, nme.EQ, EQ)
addPrimitives(DoubleClass, nme.NE, NE)
addPrimitives(DoubleClass, nme.ADD, ADD)
addPrimitives(DoubleClass, nme.SUB, SUB)
addPrimitives(DoubleClass, nme.MUL, MUL)
addPrimitives(DoubleClass, nme.DIV, DIV)
addPrimitives(DoubleClass, nme.MOD, MOD)
addPrimitives(DoubleClass, nme.LT, LT)
addPrimitives(DoubleClass, nme.LE, LE)
addPrimitives(DoubleClass, nme.GT, GT)
addPrimitives(DoubleClass, nme.GE, GE)
// conversions
addPrimitives(DoubleClass, nme.toByte, D2B)
addPrimitives(DoubleClass, nme.toShort, D2S)
addPrimitives(DoubleClass, nme.toChar, D2C)
addPrimitives(DoubleClass, nme.toInt, D2I)
addPrimitives(DoubleClass, nme.toLong, D2L)
addPrimitives(DoubleClass, nme.toFloat, D2F)
addPrimitives(DoubleClass, nme.toDouble, D2D)
// unary methods
addPrimitives(DoubleClass, nme.UNARY_+, POS)
addPrimitives(DoubleClass, nme.UNARY_-, NEG)
}
/** Add a primitive operation to the map */
def addPrimitive(s: Symbol, code: Int) {
assert(!(primitives contains s), "Duplicate primitive " + s)
primitives(s) = code
}
def addPrimitives(cls: Symbol, method: Name, code: Int) {
val tpe = cls.info
val sym = tpe.member(method)
if (sym == NoSymbol)
inform("Unknown primitive method " + cls + "." + method)
for (s <- sym.alternatives)
addPrimitive(
s,
if (code == ADD && s.info.paramTypes.head == definitions.StringClass.tpe) CONCAT
else code)
}
def isCoercion(code: Int): Boolean = (code >= B2B) && (code <= D2D)
final val typeOfArrayOp: Map[Int, TypeKind] = Map(
(List(ZARRAY_LENGTH, ZARRAY_GET, ZARRAY_SET) map (_ -> BOOL)) ++
(List(BARRAY_LENGTH, BARRAY_GET, BARRAY_SET) map (_ -> BYTE)) ++
(List(SARRAY_LENGTH, SARRAY_GET, SARRAY_SET) map (_ -> SHORT)) ++
(List(CARRAY_LENGTH, CARRAY_GET, CARRAY_SET) map (_ -> CHAR)) ++
(List(IARRAY_LENGTH, IARRAY_GET, IARRAY_SET) map (_ -> INT)) ++
(List(LARRAY_LENGTH, LARRAY_GET, LARRAY_SET) map (_ -> LONG)) ++
(List(FARRAY_LENGTH, FARRAY_GET, FARRAY_SET) map (_ -> FLOAT)) ++
(List(DARRAY_LENGTH, DARRAY_GET, DARRAY_SET) map (_ -> DOUBLE)) ++
(List(OARRAY_LENGTH, OARRAY_GET, OARRAY_SET) map (_ -> REFERENCE(AnyRefClass))) : _*
)
/** Check whether the given operation code is an array operation. */
def isArrayOp(code: Int): Boolean =
isArrayNew(code) | isArrayLength(code) | isArrayGet(code) | isArraySet(code)
def isArrayNew(code: Int): Boolean = code match {
case NEW_ZARRAY | NEW_BARRAY | NEW_SARRAY | NEW_CARRAY |
NEW_IARRAY | NEW_LARRAY | NEW_FARRAY | NEW_DARRAY |
NEW_OARRAY => true
case _ => false
}
def isArrayLength(code: Int): Boolean = code match {
case ZARRAY_LENGTH | BARRAY_LENGTH | SARRAY_LENGTH | CARRAY_LENGTH |
IARRAY_LENGTH | LARRAY_LENGTH | FARRAY_LENGTH | DARRAY_LENGTH |
OARRAY_LENGTH | LENGTH => true
case _ => false
}
def isArrayGet(code: Int): Boolean = code match {
case ZARRAY_GET | BARRAY_GET | SARRAY_GET | CARRAY_GET |
IARRAY_GET | LARRAY_GET | FARRAY_GET | DARRAY_GET |
OARRAY_GET | APPLY => true
case _ => false
}
def isArraySet(code: Int): Boolean = code match {
case ZARRAY_SET | BARRAY_SET | SARRAY_SET | CARRAY_SET |
IARRAY_SET | LARRAY_SET | FARRAY_SET | DARRAY_SET |
OARRAY_SET | UPDATE => true;
case _ => false;
}
/** Check whether the given code is a comparison operator */
def isComparisonOp(code: Int): Boolean = code match {
case ID | NI | EQ | NE |
LT | LE | GT | GE => true
case _ => false
}
def isUniversalEqualityOp(code: Int): Boolean = (code == EQ) || (code == NE)
def isReferenceEqualityOp(code: Int): Boolean = (code == ID) || (code == NI)
def isArithmeticOp(code: Int): Boolean = code match {
case POS | NEG | NOT => true; // unary
case ADD | SUB | MUL |
DIV | MOD => true; // binary
case OR | XOR | AND |
LSL | LSR | ASR => true; // bitwise
case _ => false;
}
def isLogicalOp(code: Int): Boolean = code match {
case ZNOT | ZAND | ZOR => true
case _ => false
}
def isShiftOp(code: Int): Boolean = code match {
case LSL | LSR | ASR => true
case _ => false
}
def isBitwiseOp(code: Int): Boolean = code match {
case OR | XOR | AND => true
case _ => false
}
/** If code is a coercion primitive, the result type */
def generatedKind(code: Int): TypeKind = code match {
case B2B | C2B | S2B | I2B | L2B | F2B | D2B => BYTE
case B2C | C2C | S2C | I2C | L2C | F2C | D2C => CHAR
case B2S | C2S | S2S | I2S | L2S | F2S | D2S => SHORT
case B2I | C2I | S2I | I2I | L2I | F2I | D2I => INT
case B2L | C2L | S2L | I2L | L2L | F2L | D2L => LONG
case B2F | C2F | S2F | I2F | L2F | F2F | D2F => FLOAT
case B2D | C2D | S2D | I2D | L2D | F2D | D2D => DOUBLE
}
def isPrimitive(sym: Symbol): Boolean = primitives contains sym
/** Return the code for the given symbol. */
def getPrimitive(sym: Symbol): Int = {
assert(isPrimitive(sym), "Unknown primitive " + sym)
primitives(sym)
}
/**
* Return the primitive code of the given operation. If the
* operation is an array get/set, we inspect the type of the receiver
* to demux the operation.
*
* @param fun The method symbol
* @param tpe The type of the receiver object. It is used only for array
* operations
*/
def getPrimitive(fun: Symbol, tpe: Type): Int = {
import definitions._
val code = getPrimitive(fun)
def elementType = atPhase(currentRun.typerPhase) {
val arrayParent = tpe :: tpe.parents collectFirst {
case TypeRef(_, ArrayClass, elem :: Nil) => elem
}
arrayParent getOrElse sys.error(fun.fullName + " : " + (tpe :: tpe.baseTypeSeq.toList).mkString(", "))
}
code match {
case APPLY =>
toTypeKind(elementType) match {
case BOOL => ZARRAY_GET
case BYTE => BARRAY_GET
case SHORT => SARRAY_GET
case CHAR => CARRAY_GET
case INT => IARRAY_GET
case LONG => LARRAY_GET
case FLOAT => FARRAY_GET
case DOUBLE => DARRAY_GET
case REFERENCE(_) | ARRAY(_) => OARRAY_GET
case _ =>
abort("Unexpected array element type: " + elementType)
}
case UPDATE =>
toTypeKind(elementType) match {
case BOOL => ZARRAY_SET
case BYTE => BARRAY_SET
case SHORT => SARRAY_SET
case CHAR => CARRAY_SET
case INT => IARRAY_SET
case LONG => LARRAY_SET
case FLOAT => FARRAY_SET
case DOUBLE => DARRAY_SET
case REFERENCE(_) | ARRAY(_) => OARRAY_SET
case _ =>
abort("Unexpected array element type: " + elementType)
}
case LENGTH =>
toTypeKind(elementType) match {
case BOOL => ZARRAY_LENGTH
case BYTE => BARRAY_LENGTH
case SHORT => SARRAY_LENGTH
case CHAR => CARRAY_LENGTH
case INT => IARRAY_LENGTH
case LONG => LARRAY_LENGTH
case FLOAT => FARRAY_LENGTH
case DOUBLE => DARRAY_LENGTH
case REFERENCE(_) | ARRAY(_) => OARRAY_LENGTH
case _ =>
abort("Unexpected array element type: " + elementType)
}
case _ =>
code
}
}
}
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