polyglot.ast

Interface Expr

All Superinterfaces:

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

All Known Subinterfaces:

AmbAssign, AmbExpr, ArrayAccess, ArrayAccessAssign, ArrayInit, Assign, Binary, BooleanLit, Call, Cast, CharLit, ClassLit, Conditional, EnumConstant, Field, FieldAssign, FloatLit, Instanceof, IntLit, Lit, Local, LocalAssign, NamedVariable, New, NewArray, NullLit, NumLit, Special, StringLit, Unary, Variable

All Known Implementing Classes:

AmbAssign_c, AmbExpr_c, ArrayAccess_c, ArrayAccessAssign_c, ArrayInit_c, Assign_c, Binary_c, BooleanLit_c, Call_c, Cast_c, CharLit_c, ClassLit_c, Conditional_c, EnumConstant_c, Expr_c, Field_c, FieldAssign_c, FloatLit_c, Instanceof_c, IntLit_c, Lit_c, Local_c, LocalAssign_c, New_c, NewArray_c, NullLit_c, NumLit_c, Special_c, StringLit_c, Unary_c

public interface Expr
extends Receiver, Term

An Expr represents some Java expression. All expressions must be subtypes of Expr.

Nested Class Summary

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 inherited from interface polyglot.ast.Term

ENTRY, EXIT

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	constantValue() Deprecated.
boolean	constantValueSet() Deprecated.
boolean	isConstant() Deprecated.
Precedence	precedence() Get the precedence of the expression.
void	printSubExpr(Expr expr, boolean associative, CodeWriter w, PrettyPrinter pp) Correctly parenthesize the subexpression expr based on its precedence and the precedence of this expression.
void	printSubExpr(Expr expr, CodeWriter w, PrettyPrinter pp) Correctly parenthesize the subexpression expr based on its precedence and the precedence of this expression.
Expr	type(Type type) Return an equivalent expression, but with the type 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, childExpectedType, copy, copy, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, dump, dump, enterChildScope, enterScope, exceptionCheck, exceptionCheckEnter, extRewrite, extRewriteEnter, lang, prettyPrint, prettyPrint, prettyPrint, prettyPrint, prettyPrint, throwTypes, translate, typeCheck, typeCheckEnter, typeCheckOverride, visitChild, visitChildren, 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

Method Detail

type

Expr type(Type type)

Return an equivalent expression, but with the type type.

precedence

Precedence precedence()

Get the precedence of the expression.

constantValueSet

@Deprecated
boolean constantValueSet()

Deprecated.

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.

isConstant

@Deprecated
boolean isConstant()

Deprecated.

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

constantValue

@Deprecated
java.lang.Object constantValue()

Deprecated.

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

printSubExpr

void printSubExpr(Expr expr,
                boolean associative,
                CodeWriter w,
                PrettyPrinter pp)

Correctly parenthesize the subexpression expr based on its precedence and the precedence of this expression. If the sub-expression has the same precedence as this expression, we parenthesize if the sub-expression does not associate. For example, we parenthesize the right subexpression of a left-associative operator.

Parameters:

expr - The subexpression.

associative - Whether expr is the left (right) child of a left- (right-) associative operator.

w - The output writer.

pp - The pretty printer.

printSubExpr

void printSubExpr(Expr expr,
                CodeWriter w,
                PrettyPrinter pp)

Correctly parenthesize the subexpression expr based on its precedence and the precedence of this expression. If the sub-expression has the same precedence as this expression we do not parenthesize. This is equivalent to printSubexpr(expr, true, w, pp)

Parameters:

expr - The subexpression.

w - The output writer.

pp - The pretty printer.