/* NSC -- new Scala compiler * Copyright 2005-2009 LAMP/EPFL * @author Martin Odersky */ // $Id: ScalaPrimitives.scala 18552 2009-08-23 14:58:30Z extempore $ package scala.tools.nsc package backend import scala.tools.nsc.backend.icode._ import scala.collection.mutable.{Map, HashMap} /** * 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:</p> * <ul> * <li> * <code>"=="</code> checks for null, and if non-null, calls * <code>java.lang.Object.equals</code><br/> * <code>(class: Any; modifier: final)</code>. Primitive: EQ * </li> * <li> * <code>"eq"</code> usual reference comparison<br/> * <code>(class: AnyRef; modifier: final)</code>. Primitive: ID * </li> * <li> * <code>"equals"</code> user-defined equality (Java semantics)<br/> * <code>(class: Object; modifier: none)</code>. 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 ISERASED = 85 // x.is$erased[y] final val ASERASED = 86 // x.as$erased[y] // 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 var primitives: Map[Symbol, Int] = _ /** Initialize the primitive map */ def init { primitives = new HashMap() // scala.Any addPrimitive(Any_==, EQ) addPrimitive(Any_!=, NE) addPrimitive(Any_isInstanceOf, IS) addPrimitive(Any_asInstanceOf, AS) // 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) /** 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 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 givem symbol. */ def getPrimitive(sym: Symbol): Int = { assert(isPrimitive(sym), "Unkown 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) var elem: Type = null tpe match { case TypeRef(_, sym, _elem :: Nil) if (sym == ArrayClass) => elem = _elem case _ => () } code match { case APPLY => toTypeKind(elem) 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: " + elem) } case UPDATE => toTypeKind(elem) 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: " + elem) } case LENGTH => assert(elem != null) toTypeKind(elem) 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: " + elem) } case _ => code } } }