org.multijava.mjc
Class JShiftExpression

java.lang.Object
  org.multijava.util.Utils
      org.multijava.util.compiler.Phylum
          org.multijava.mjc.JPhylum
              org.multijava.mjc.JExpression
                  org.multijava.mjc.JBinaryExpression
                      org.multijava.mjc.JBinaryArithmeticExpression
                          org.multijava.mjc.JShiftExpression

All Implemented Interfaces:

Cloneable, Constants, Constants, PhylumType

public class JShiftExpression

extends JBinaryArithmeticExpression

This class represents the shift (left, right, boolean-right) binary expressions.

Field Summary
protected  int	oper

 

Fields inherited from class org.multijava.mjc.JBinaryExpression

left, right, type

 

Fields inherited from class org.multijava.mjc.JExpression

EMPTY

 

Fields inherited from class org.multijava.util.compiler.Phylum

 

Fields inherited from class org.multijava.util.Utils

DBG_LEVEL_HIGH, DBG_LEVEL_LOW, DBG_LEVEL_NO

 

Fields inherited from interface org.multijava.mjc.Constants

ACC_MODIFIER_FLAGS_MASK, ACC_NON_NULL, ACC_NON_NULL_BY_DEFAULT, ACC_NULLABLE, ACC_NULLABLE_BY_DEFAULT, ACC_PURE, ACCESS_FLAG_ARRAY, ACCESS_FLAG_NAMES, AMID_JAVA_MATH, AMID_MAX, AMID_SAFE_MATH, CMP_VERSION, IMPLICITLY_NON_NULL, JAV_ASSERTION_ERROR, JAV_CLASS, JAV_CLASSLOADER, JAV_CLASSNOTFOUND_EXCEPTION, JAV_CLONE, JAV_CLONEABLE, JAV_CONSTRUCTOR, JAV_ERROR, JAV_EXCEPTION, JAV_INIT, JAV_LENGTH, JAV_NAME_SEPARATOR, JAV_NOCLASSDEFFOUND_ERROR, JAV_OBJECT, JAV_OUTER_THIS, JAV_RMJ_RUNTIME_EXCEPTION, JAV_RUNTIME, JAV_RUNTIME_EXCEPTION, JAV_SERIALIZABLE, JAV_STATIC_INIT, JAV_STRING, JAV_STRINGBUFFER, JAV_SUPER, JAV_THIS, JAV_THROWABLE, MJ_ANCHOR, NULLITY_MODS, OPE_BAND, OPE_BNOT, OPE_BOR, OPE_BSR, OPE_BXOR, OPE_EQ, OPE_GE, OPE_GT, OPE_LAND, OPE_LE, OPE_LNOT, OPE_LOR, OPE_LT, OPE_MINUS, OPE_NE, OPE_PERCENT, OPE_PLUS, OPE_POSTDEC, OPE_POSTINC, OPE_PREDEC, OPE_PREINC, OPE_SIMPLE, OPE_SL, OPE_SLASH, OPE_SR, OPE_STAR, TID_ARRAY, TID_BOOLEAN, TID_BYTE, TID_CHAR, TID_CLASS, TID_DOUBLE, TID_FLOAT, TID_INT, TID_LONG, TID_MAX, TID_SHORT, TID_VOID, UNIV_ARRAY_TMP, UNIV_TMP

 

Fields inherited from interface org.multijava.util.classfile.Constants

ACC_ABSTRACT, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VOLATILE, ATT_ANCHOR, ATT_BRIDGE, ATT_CODE, ATT_CONSTANTVALUE, ATT_DEPRECATED, ATT_DISPATCHER, ATT_EXCEPTIONS, ATT_GENERIC, ATT_GENERIC_FUNCTIONS, ATT_INNERCLASSES, ATT_LINENUMBERTABLE, ATT_LOCALVARIABLETABLE, ATT_MM_BODY, ATT_REDIRECTOR, ATT_RMJ_GLUE, ATT_RMJ_SIGNATURE, ATT_RUNTIME_VISIBLE_ANNOTATIONS, ATT_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, ATT_SIGNATURE, ATT_SOURCEFILE, ATT_SYNTHETIC, ATT_UNIVERSE_FIELD, ATT_UNIVERSE_METHOD, ATT_UNIVERSE_VERSION, CST_CLASS, CST_DOUBLE, CST_FIELD, CST_FLOAT, CST_INTEGER, CST_INTERFACEMETHOD, CST_LONG, CST_METHOD, CST_NAMEANDTYPE, CST_STRING, CST_UTF8, ENV_DEBUG_MODE, ENV_USE_CACHE, JAVA_MAGIC, JAVA_MAJOR, JAVA_MINOR, MAX_CODE_PER_METHOD, opc_aaload, opc_aastore, opc_aconst_null, opc_aload, opc_aload_0, opc_aload_1, opc_aload_2, opc_aload_3, opc_anewarray, opc_areturn, opc_arraylength, opc_astore, opc_astore_0, opc_astore_1, opc_astore_2, opc_astore_3, opc_athrow, opc_baload, opc_bastore, opc_bipush, opc_caload, opc_castore, opc_checkcast, opc_d2f, opc_d2i, opc_d2l, opc_dadd, opc_daload, opc_dastore, opc_dcmpg, opc_dcmpl, opc_dconst_0, opc_dconst_1, opc_ddiv, opc_dload, opc_dload_0, opc_dload_1, opc_dload_2, opc_dload_3, opc_dmul, opc_dneg, opc_drem, opc_dreturn, opc_dstore, opc_dstore_0, opc_dstore_1, opc_dstore_2, opc_dstore_3, opc_dsub, opc_dup, opc_dup2, opc_dup2_x1, opc_dup2_x2, opc_dup_x1, opc_dup_x2, opc_f2d, opc_f2i, opc_f2l, opc_fadd, opc_faload, opc_fastore, opc_fcmpg, opc_fcmpl, opc_fconst_0, opc_fconst_1, opc_fconst_2, opc_fdiv, opc_fload, opc_fload_0, opc_fload_1, opc_fload_2, opc_fload_3, opc_fmul, opc_fneg, opc_frem, opc_freturn, opc_fstore, opc_fstore_0, opc_fstore_1, opc_fstore_2, opc_fstore_3, opc_fsub, opc_getfield, opc_getstatic, opc_goto, opc_goto_w, opc_i2b, opc_i2c, opc_i2d, opc_i2f, opc_i2l, opc_i2s, opc_iadd, opc_iaload, opc_iand, opc_iastore, opc_iconst_0, opc_iconst_1, opc_iconst_2, opc_iconst_3, opc_iconst_4, opc_iconst_5, opc_iconst_m1, opc_idiv, opc_if_acmpeq, opc_if_acmpne, opc_if_icmpeq, opc_if_icmpge, opc_if_icmpgt, opc_if_icmple, opc_if_icmplt, opc_if_icmpne, opc_ifeq, opc_ifge, opc_ifgt, opc_ifle, opc_iflt, opc_ifne, opc_ifnonnull, opc_ifnull, opc_iinc, opc_iload, opc_iload_0, opc_iload_1, opc_iload_2, opc_iload_3, opc_imul, opc_ineg, opc_instanceof, opc_invokeinterface, opc_invokespecial, opc_invokestatic, opc_invokevirtual, opc_ior, opc_irem, opc_ireturn, opc_ishl, opc_ishr, opc_istore, opc_istore_0, opc_istore_1, opc_istore_2, opc_istore_3, opc_isub, opc_iushr, opc_ixor, opc_jsr, opc_jsr_w, opc_l2d, opc_l2f, opc_l2i, opc_ladd, opc_laload, opc_land, opc_lastore, opc_lcmp, opc_lconst_0, opc_lconst_1, opc_ldc, opc_ldc2_w, opc_ldc_w, opc_ldiv, opc_lload, opc_lload_0, opc_lload_1, opc_lload_2, opc_lload_3, opc_lmul, opc_lneg, opc_lookupswitch, opc_lor, opc_lrem, opc_lreturn, opc_lshl, opc_lshr, opc_lstore, opc_lstore_0, opc_lstore_1, opc_lstore_2, opc_lstore_3, opc_lsub, opc_lushr, opc_lxor, opc_monitorenter, opc_monitorexit, opc_multianewarray, opc_new, opc_newarray, opc_nop, opc_pop, opc_pop2, opc_putfield, opc_putstatic, opc_ret, opc_return, opc_saload, opc_sastore, opc_sipush, opc_swap, opc_tableswitch, opc_wide, opc_xxxunusedxxx, POO_ASCII_CONSTANT, POO_CLASS_CONSTANT, POO_DOUBLE_CONSTANT, POO_FLOAT_CONSTANT, POO_INTEGER_CONSTANT, POO_LONG_CONSTANT, POO_NAT_CONSTANT, POO_REF_CONSTANT, POO_STRING_CONSTANT, TYP_ADDRESS, TYP_DOUBLE, TYP_FLOAT, TYP_INT, TYP_LONG, TYP_REFERENCE, TYP_VOID

 

Constructor Summary

JShiftExpression(TokenReference where, int oper, JExpression left, JExpression right)           Construct a node in the parsing tree This method is directly called by the parser

 

Method Summary
void	accept(MjcVisitor p)           Accepts the specified visitor
int	compute(int left, int right)           Computes the result of the operation at compile-time (JLS 15.27).
long	compute(long left, int right)           Computes the result of the operation at compile-time (JLS 15.27).
static CType	computeType(CType leftType, CType rightType)           compute the type of this expression according to operands
JExpression	constantFolding()           Converts two constant expressions into a single literal that is the result of applying this operation to the expressions.
void	genCode(CodeSequence code)           Generates a sequence of bytecodes
static int	getOpcode(int oper, CType type)
int	oper()
String	toString()
JExpression	typecheck(CExpressionContextType context)           Typechecks the expression and mutates the context to record information gathered during typechecking.
JExpression	typecheckBinaryArith(CExpressionContextType context)           Typechecks a binary arithmetic expression and handles simple optimizations like constant folding.

 

Methods inherited from class org.multijava.mjc.JBinaryExpression

genBooleanResultCode, genBranch, genBranch, getType, left, promote, right, setLeft, setRight, setType

 

Methods inherited from class org.multijava.mjc.JExpression

buildUniverseDynChecks, clone, convertType, dumpArray, fail, genUniverseDynCheckCode, getApparentType, getBooleanLiteral, getFANonNulls, getFANulls, getLiteral, getNumberLiteral, getOrdinalLiteral, getRealLiteral, getStringLiteral, isAssignableTo, isBooleanLiteral, isConstant, isDeclaredNonNull, isLiteral, isMaybeInitializable, isNonNull, isOrdinalLiteral, isRealLiteral, isStatementExpression, isStringLiteral, typecheck, unParenthesize

 

Methods inherited from class org.multijava.mjc.JPhylum

check, check, check, check, fail, fail, warn, warn, warn, warn

 

Methods inherited from class org.multijava.util.compiler.Phylum

getTokenReference, setTokenReference

 

Methods inherited from class org.multijava.util.Utils

assertTrue, assertTrue, combineArrays, escapeString, escapeString, fail, fail, getFilePath, hasFlag, hasOtherFlags, parsePathParts, relativePathTo, splitQualifiedName, splitQualifiedName, stripJavaModifiers, stripNonJavaModifiers, stripPrivateModifier, unescapeString, vectorToArray, vectorToIntArray

 

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

oper

protected int oper

JShiftExpression

public JShiftExpression(TokenReference where,
                        int oper,
                        JExpression left,
                        JExpression right)

Construct a node in the parsing tree This method is directly called by the parser

Parameters:

where - the line of this node in the source code

oper - the operator

left - the left operand

right - the right operand

toString

public String toString()

Overrides:

toString in class Object

typecheck

public JExpression typecheck(CExpressionContextType context)
                      throws PositionedError

Typechecks the expression and mutates the context to record information gathered during typechecking.

Overrides:

typecheck in class JBinaryArithmeticExpression

Parameters:

context - the context in which this expression appears

Returns:

a desugared Java expression (see JExpression.typecheck())

Throws:

PositionedError - if the check fails

typecheckBinaryArith

public JExpression typecheckBinaryArith(CExpressionContextType context)
                                 throws PositionedError

Typechecks a binary arithmetic expression and handles simple optimizations like constant folding.

Parameters:

context - the actual context of analysis

Returns:

a desugared Java expression (see JExpression.typecheck())

Throws:

PositionedError - if checks fail

computeType

public static CType computeType(CType leftType,
                                CType rightType)
                         throws UnpositionedError

compute the type of this expression according to operands

Parameters:

leftType - the type of left operand

rightType - the type of right operand

Returns:

the type computed for this binary operation

Throws:

UnpositionedError - this error will be positioned soon

constantFolding

public JExpression constantFolding()

Converts two constant expressions into a single literal that is the result of applying this operation to the expressions.

Returns:

a literal resulting from an operation over two literals

compute

public int compute(int left,
                   int right)

Computes the result of the operation at compile-time (JLS 15.27).

Parameters:

left - the first operand

right - the seconds operand

Returns:

the result of the operation

compute

public long compute(long left,
                    int right)

Computes the result of the operation at compile-time (JLS 15.27).

Parameters:

left - the first operand

right - the seconds operand

Returns:

the result of the operation

accept

public void accept(MjcVisitor p)

Accepts the specified visitor

Parameters:

p - the visitor

getOpcode

public static int getOpcode(int oper,
                            CType type)

Parameters:

type - the type of result

Returns:

the type of opcode for this operation

genCode

public void genCode(CodeSequence code)

Generates a sequence of bytecodes

Parameters:

code - the code list

oper

public int oper()