polyglot.ast

Class Unary_c

java.lang.Object

polyglot.ast.Node_c

polyglot.ast.Term_c

polyglot.ast.Expr_c

polyglot.ast.Unary_c

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Expr, ExprOps, Node, NodeOps, Prefix, Receiver, Term, TermOps, Typed, Unary, Copy<Node>

public class Unary_c
extends Expr_c
implements Unary

A Unary represents a Java unary expression, an immutable pair of an expression and an operator.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface polyglot.ast.Unary

Unary.Operator

Nested classes/interfaces inherited from interface polyglot.util.Copy

Copy.Util

Nested classes/interfaces inherited from interface polyglot.ast.Term

Term.Instance

Field Summary

Fields

Modifier and Type	Field and Description
protected Expr	expr
protected Unary.Operator	op

Fields inherited from class polyglot.ast.Expr_c

type

Fields inherited from class polyglot.ast.Term_c

exceptions, reachable

Fields inherited from class polyglot.ast.Node_c

del, error, ext, position

Fields inherited from interface polyglot.ast.Unary

BIT_NOT, NEG, NOT, POS, POST_DEC, POST_INC, PRE_DEC, PRE_INC

Fields inherited from interface polyglot.ast.Term

ENTRY, EXIT

Constructor Summary

Constructors

Constructor and Description
Unary_c(Position pos, Unary.Operator op, Expr expr)
Unary_c(Position pos, Unary.Operator op, Expr expr, Ext ext)

Method Summary

Methods

Modifier and Type	Method and Description
<T> java.util.List<T>	acceptCFG(CFGBuilder<?> v, java.util.List<T> succs) Visit this term in evaluation order, calling v.edge() for each successor in succs, if data flows on that edge.
Type	childExpectedType(Expr child, AscriptionVisitor av) Get the expected type of a child expression of this.
java.lang.Object	constantValue(Lang lang) Return the constant value of the expression, if any.
boolean	constantValueSet(Lang lang) Return true iff the compiler has determined whether this expression has a constant value.
Node	copy(NodeFactory nf) Produce a copy of this node using the given NodeFactory.
Expr	expr() The sub-expression on which to apply the operator.
Unary	expr(Expr expr) Set the sub-expression on which to apply the operator.
protected <N extends Unary_c> N	expr(N n, Expr expr)
Term	firstChild() Return the first direct subterm performed when evaluating this term.
boolean	isConstant(Lang lang) Return whether the expression evaluates to a constant.
Unary.Operator	operator() The operator to apply on the sub-expression.
protected <N extends Unary_c> N	operator(N n, Unary.Operator op)
Unary	operator(Unary.Operator op) Set the operator to apply on the sub-expression.
Precedence	precedence() Get the precedence of the expression.
void	prettyPrint(CodeWriter w, PrettyPrinter tr) Pretty-print the AST using the given CodeWriter.
protected <N extends Unary_c> N	reconstruct(N n, Expr expr) Reconstruct the expression.
java.lang.String	toString()
Node	typeCheck(TypeChecker tc) Type check the AST.
Node	visitChildren(NodeVisitor v) Visit the children of the node.

Methods inherited from class polyglot.ast.Expr_c

booleanValue, buildTypes, byteValue, charValue, constantValue, constantValueSet, doubleValue, dump, extRewrite, floatValue, intValue, isConstant, isTypeChecked, lastLang, longValue, printSubExpr, printSubExpr, shortValue, stringValue, type, type, type

Methods inherited from class polyglot.ast.Term_c

exceptionCheck, exceptions, exceptions, exceptions, listChild, reachable, reachable, reachable

Methods inherited from class polyglot.ast.Node_c

addDecls, buildTypesEnter, checkConstants, copy, copy, copyIfNeeded, del, del, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, dump, dump, enterChildScope, enterScope, error, error, error, exceptionCheckEnter, ext, ext, ext, ext, extRewriteEnter, isDisambiguated, lang, position, position, position, prettyPrint, prettyPrint, prettyPrint, prettyPrint, print, printBlock, printSubStmt, throwTypes, translate, typeCheckEnter, typeCheckOverride, visit, visitChild, visitEdge, visitList

Methods inherited from class java.lang.Object

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

Methods inherited from interface polyglot.ast.Expr

constantValue, constantValueSet, isConstant, printSubExpr, printSubExpr, type

Methods inherited from interface polyglot.ast.Node

del, del, dump, error, error, ext, ext, ext, ext, isDisambiguated, isTypeChecked, position, position, visit, visitEdge

Methods inherited from interface polyglot.ast.NodeOps

addDecls, buildTypes, buildTypesEnter, checkConstants, copy, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, dump, dump, enterChildScope, enterScope, exceptionCheck, exceptionCheckEnter, extRewrite, extRewriteEnter, lang, prettyPrint, prettyPrint, prettyPrint, prettyPrint, throwTypes, translate, typeCheckEnter, typeCheckOverride, visitChild, visitList

Methods inherited from interface polyglot.util.Copy

copy

Methods inherited from interface polyglot.ast.Typed

type

Methods inherited from interface polyglot.ast.Term

exceptions, exceptions, reachable, reachable

Field Detail

op

protected Unary.Operator op

expr

protected Expr expr

Constructor Detail

Unary_c

public Unary_c(Position pos,
       Unary.Operator op,
       Expr expr)

Unary_c

public Unary_c(Position pos,
       Unary.Operator op,
       Expr expr,
       Ext ext)

Method Detail

precedence

public Precedence precedence()

Description copied from interface: Expr

Get the precedence of the expression.

Specified by:

precedence in interface Expr

Overrides:

precedence in class Expr_c

expr

public Expr expr()

Description copied from interface: Unary

The sub-expression on which to apply the operator.

Specified by:

expr in interface Unary

expr

public Unary expr(Expr expr)

Description copied from interface: Unary

Set the sub-expression on which to apply the operator.

Specified by:

expr in interface Unary

expr

protected <N extends Unary_c> N expr(N n,
                         Expr expr)

operator

public Unary.Operator operator()

Description copied from interface: Unary

The operator to apply on the sub-expression.

Specified by:

operator in interface Unary

operator

public Unary operator(Unary.Operator op)

Description copied from interface: Unary

Set the operator to apply on the sub-expression.

Specified by:

operator in interface Unary

operator

protected <N extends Unary_c> N operator(N n,
                             Unary.Operator op)

reconstruct

protected <N extends Unary_c> N reconstruct(N n,
                                Expr expr)

Reconstruct the expression.

visitChildren

public Node visitChildren(NodeVisitor v)

Description copied from interface: NodeOps

Visit the children of the node.

Specified by:

visitChildren in interface NodeOps

Overrides:

visitChildren in class Node_c

Parameters:

v - The visitor that will traverse/rewrite the AST.

Returns:

A new AST if a change was made, or this.

typeCheck

public Node typeCheck(TypeChecker tc)
               throws SemanticException

Description copied from interface: NodeOps

Type check the AST. This method is called by the leave() method of the visitor. The method should perform work that should be done after visiting the children of the node. The method may return this or a new copy of the node which will be installed as a child of the node's parent.

Specified by:

typeCheck in interface NodeOps

Overrides:

typeCheck in class Node_c

Parameters:

tc - The type checking visitor.

Throws:

SemanticException

childExpectedType

public Type childExpectedType(Expr child,
                     AscriptionVisitor av)

Description copied from interface: NodeOps

Get the expected type of a child expression of this. The expected type is determined by the context in that the child occurs (e.g., for x = e, the expected type of e is the declared type of x. The expected type should impose the least constraints on the child's type that are allowed by the parent node.

Specified by:

childExpectedType in interface NodeOps

Overrides:

childExpectedType in class Node_c

Parameters:

child - A child expression of this node.

av - An ascription visitor.

Returns:

The expected type of child.

toString

public java.lang.String toString()

Overrides:

toString in class Node_c

prettyPrint

public void prettyPrint(CodeWriter w,
               PrettyPrinter tr)

Description copied from class: Node_c

Pretty-print the AST using the given CodeWriter.

Specified by:

prettyPrint in interface NodeOps

Overrides:

prettyPrint in class Node_c

Parameters:

w - The code writer to which to write.

tr - The pretty printer. This is not a visitor.

firstChild

public Term firstChild()

Description copied from interface: TermOps

Return the first direct subterm performed when evaluating this term. If this term has no subterms, this should return null. This method is similar to the deprecated entry(), but it should *not* recursively drill down to the innermost subterm. The direct child visited first in this term's dataflow should be returned.

Specified by:

firstChild in interface TermOps

Specified by:

firstChild in class Term_c

acceptCFG

public <T> java.util.List<T> acceptCFG(CFGBuilder<?> v,
                              java.util.List<T> succs)

Description copied from interface: TermOps

Visit this term in evaluation order, calling v.edge() for each successor in succs, if data flows on that edge.

Specified by:

acceptCFG in interface TermOps

Specified by:

acceptCFG in class Term_c

constantValueSet

public boolean constantValueSet(Lang lang)

Description copied from interface: ExprOps

Return true iff the compiler has determined whether this expression has a constant value. The value returned by isConstant() is valid only if constantValueSet() is true.

Specified by:

constantValueSet in interface ExprOps

Overrides:

constantValueSet in class Expr_c

isConstant

public boolean isConstant(Lang lang)

Description copied from interface: ExprOps

Return whether the expression evaluates to a constant. Requires that disambiguation has been done, and that constantValueSet() is true.

Specified by:

isConstant in interface ExprOps

Overrides:

isConstant in class Expr_c

constantValue

public java.lang.Object constantValue(Lang lang)

Description copied from interface: ExprOps

Return the constant value of the expression, if any. Requires that isConstant() is true.

Specified by:

constantValue in interface ExprOps

Overrides:

constantValue in class Expr_c

copy

public Node copy(NodeFactory nf)

Description copied from interface: NodeOps

Produce a copy of this node using the given NodeFactory.

Specified by:

copy in interface NodeOps

Overrides:

copy in class Node_c