org.omegahat.Environment.Parser.Parse
Class UpdateUnaryExpression

java.lang.Object
  |
  +--antlr.BaseAST
        |
        +--antlr.CommonAST
              |
              +--org.omegahat.Environment.Parser.Parse.BasicExpression
                    |
                    +--org.omegahat.Environment.Parser.Parse.NumberExpression
                          |
                          +--org.omegahat.Environment.Parser.Parse.UnaryExpression
                                |
                                +--org.omegahat.Environment.Parser.Parse.UpdateUnaryExpression

All Implemented Interfaces:

antlr.collections.AST, Evaluable, ExpressionInt, OmegaTokenTypes, java.lang.Runnable, java.io.Serializable, Subsettable, TreeNodeInt

public class UpdateUnaryExpression

extends UnaryExpression

This is the class that represents and performs the evaluation of increment and decrement operations, be they either prefix or postfix, such as

x++  
a.b--
++x[0]

See Also:

Serialized Form

Field Summary

protected boolean

prefix

Fields inherited from class org.omegahat.Environment.Parser.Parse.UnaryExpression

expression, operation

Fields inherited from class org.omegahat.Environment.Parser.Parse.BasicExpression

children, comments, isActive, parent, POST, PRE

Fields inherited from class antlr.BaseAST

down, right

Fields inherited from interface org.omegahat.Environment.Parser.AntlrParser.OmegaTokenTypes

ABSTRACT, ARG_LIST, ARRAY_DECLARATOR, ARRAY_INIT, ASSIGN, BAND, BAND_ASSIGN, BLOCK, BNOT, BOR, BOR_ASSIGN, BREAK, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN, CHAR_LITERAL, CLASS_DEF, COLON, COMMA, CONTINUE, CTOR_DEF, DEC, DIV, DIV_ASSIGN, DOT, DOTS, EAGER, ELEMENT_OP, EOF, EQUAL, ESC, EXPONENT, EXPONENT_OP, EXPR, EXTENDS_CLAUSE, FINAL, FLOAT_SUFFIX, FUNCTION, GE, GT, HEX_DIGIT, IDENT, IMPLEMENTS_CLAUSE, IMPORT, INC, INDEX_OP, INSTANCE_INIT, INSTANCEOF, INTERFACE_DEF, LABELED_STAT, LAND, LAZY, LBRACK, LCURLY, LE, LITERAL_abstract, LITERAL_boolean, LITERAL_break, LITERAL_byte, LITERAL_case, LITERAL_catch, LITERAL_char, LITERAL_class, LITERAL_const, LITERAL_continue, LITERAL_default, LITERAL_do, LITERAL_double, LITERAL_eager, LITERAL_else, LITERAL_extends, LITERAL_false, LITERAL_final, LITERAL_finally, LITERAL_float, LITERAL_for, LITERAL_function, LITERAL_global, LITERAL_if, LITERAL_implements, LITERAL_import, LITERAL_in, LITERAL_instanceof, LITERAL_int, LITERAL_interface, LITERAL_lazy, LITERAL_long, LITERAL_method, LITERAL_native, LITERAL_new, LITERAL_null, LITERAL_private, LITERAL_protected, LITERAL_public, LITERAL_return, LITERAL_short, LITERAL_static, LITERAL_super, LITERAL_switch, LITERAL_synchronized, LITERAL_this, LITERAL_threadsafe, LITERAL_throw, LITERAL_throws, LITERAL_transient, LITERAL_true, LITERAL_try, LITERAL_void, LITERAL_while, LNOT, LOR, LPAREN, LT, METHOD, METHOD_CALL, METHOD_DEF, MINUS, MINUS_ASSIGN, MISSING_ARG, ML_COMMENT, MOD, MOD_ASSIGN, MODIFIERS, NOT_EQUAL, NULL_TREE_LOOKAHEAD, NUM_FLOAT, NUM_INT, NUM_LONG, OBJBLOCK, PACKAGE_DEF, PARAMETER_DEF, PARAMETERS, PLUS, PLUS_ASSIGN, POST_DEC, POST_INC, QUESTION, RBRACK, RCURLY, RETURN, RPAREN, SEMI, SEQUENCE_OP, SL, SL_ASSIGN, SL_COMMENT, SLIST, SR, SR_ASSIGN, STAR, STAR_ASSIGN, STATIC_INIT, STRING_LITERAL, SYNCHRONIZED, THROW, TRANSIENT, TYPE, TYPECAST, UNARY_MINUS, UNARY_PLUS, VARIABLE_DEF, VOCAB, WS

Constructor Summary

UpdateUnaryExpression(java.lang.Object el, int op)

UpdateUnaryExpression(java.lang.Object el, int op, boolean pre)

Method Summary

java.lang.Object	eval(Evaluator evaluator)
boolean	isPrefix()
boolean	isPrefix(boolean val)
java.lang.Object	operate(java.lang.Object obj) Performs the action on the object.
static java.lang.Object	toNumber(double val, java.lang.Object src) See MathExpression also and consolidate.
java.lang.String	toString()

Methods inherited from class org.omegahat.Environment.Parser.Parse.UnaryExpression

asBoolean, expression, expression, getFirstChild, isReassignment, op, op, opString

Methods inherited from class org.omegahat.Environment.Parser.Parse.NumberExpression

asInt, asInteger, asNumber, isNumber, toInteger, toInteger, toNumber

Methods inherited from class org.omegahat.Environment.Parser.Parse.BasicExpression

addChild, addComment, apply, apply, apply, children, children, comment, comment, depth, error, eval, evalInit, evaluationFrame, evaluator, getReferencedVariables, getReferencedVariables, getReferencedVariables, isActive, isActive, parent, parent, postComment, postComment, preComment, preComment, render, replaceChild, resolve, run, setParent, setParent, setParent, setParent, showComments, showComments, subset, substitute, substitute

Methods inherited from class antlr.CommonAST

getText, getType, initialize, initialize, initialize, setText, setType

Methods inherited from class antlr.BaseAST

addChild, equals, equalsList, equalsListPartial, equalsTree, equalsTreePartial, findAll, findAllPartial, getNextSibling, removeChildren, setFirstChild, setNextSibling, setVerboseStringConversion, toStringList, toStringTree

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.omegahat.Environment.Parser.Parse.ExpressionInt

error, resolve, substitute

Methods inherited from interface org.omegahat.Environment.Parser.Parse.TreeNodeInt

addChild, children, depth, parent, parent, replaceChild

Methods inherited from interface org.omegahat.Environment.Language.Evaluable

eval

Field Detail

prefix

protected boolean prefix

Constructor Detail

UpdateUnaryExpression

public UpdateUnaryExpression(java.lang.Object el,
                             int op)

UpdateUnaryExpression

public UpdateUnaryExpression(java.lang.Object el,
                             int op,
                             boolean pre)

Method Detail

eval

public java.lang.Object eval(Evaluator evaluator)
                      throws java.lang.Throwable

Overrides:

eval in class UnaryExpression

operate

public java.lang.Object operate(java.lang.Object obj)

Description copied from class: UnaryExpression

Performs the action on the object.

Overrides:

operate in class UnaryExpression

isPrefix

public boolean isPrefix()

isPrefix

public boolean isPrefix(boolean val)

toNumber

public static java.lang.Object toNumber(double val,
                                        java.lang.Object src)

See MathExpression also and consolidate.

toString

public java.lang.String toString()

Overrides:

toString in class UnaryExpression