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java.lang.Objectast.ASTNode
ast.Expr
ast.UnaryExpr
public abstract class UnaryExpr
The abstract UnaryExpr class represents unary expressions whose operand is an expression (i.e., this does not include new constructions). It can be either a negation expression ('-'), a complement expression ('!'), an increment expression ('++'), or a decrement expression ('--'). It contains an expression. Subclasses of this class can be handled similarly within the compiler, so most functionality can be implemented in the visitor method for this class.
ASTNode
,
Expr
Field Summary | |
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protected Expr |
expr
The expression |
Fields inherited from class ast.ASTNode |
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charNum, lineNum, lineStr |
Constructor Summary | |
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UnaryExpr(int lineNum,
Expr expr)
UnaryExpr constructor |
Method Summary | |
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abstract java.lang.Object |
accept(visitor.Visitor v,
java.lang.Object o)
Visitor method |
Expr |
getExpr()
Get the expression |
abstract java.lang.String |
getOperandType()
Get the operand type (e.g., "boolean") (must be defined by each subclass) |
abstract java.lang.String |
getOpName()
Get the operation name (e.g., "!") (must be defined by each subclass) |
abstract java.lang.String |
getOpType()
Get the operation type (e.g., "boolean") (must be defined by each subclass) |
abstract boolean |
isPostfix()
Is this a postfix operator (as opposed to prefix)? |
Methods inherited from class ast.Expr |
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getExprType, setExprType |
Methods inherited from class ast.ASTNode |
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getLineNum |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected Expr expr
Constructor Detail |
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public UnaryExpr(int lineNum, Expr expr)
lineNum
- source line number corresponding to this AST nodeexpr
- expressionMethod Detail |
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public Expr getExpr()
public abstract java.lang.String getOpName()
public abstract java.lang.String getOpType()
public abstract java.lang.String getOperandType()
public abstract boolean isPostfix()
public abstract java.lang.Object accept(visitor.Visitor v, java.lang.Object o)
accept
in class Expr
v
- visitor objecto
- object to pass down
Visitor
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